ORBITAL MECHANICS

Go to https://NordVPN.com/SPACE to get 75% off a 3 year plan and use code SPACE to get an additional month for free. No planet’s trip around a star is exactly like the one before it, because solar systems aren't as static as they first appear. Even small nudges can add up to disaster, but some objects find safe orbits with the help of a partner or two. Hosted by: Reid Reimers SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at https://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Bill & Katie Scholl, Adam Brainard, Greg, Alex Hackman, Andrew Finley Brenan, Sam Lutfi, D.A. Noe, الخليفي سلطان, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: Sarah Millholland (https://campuspress.yale.edu/smillholland/publications/) Rick Pogge (https://astronomy.osu.edu/people/pogge.1) https://iopscience.iop.org/article/10.1088/0004-6256/150/3/73/pdf https://www.scientificamerican.com/article/orbital-forensics-hint-at-suns-long-lost-planet/ https://arxiv.org/pdf/1109.2949.pdf https://www.scientificamerican.com/article/jupiter-destroyer-of-worlds-may-have-paved-the-way-for-earth/ https://arxiv.org/pdf/1503.06945.pdf https://history.nasa.gov/SP-345/ch8.htm http://www2.ess.ucla.edu/~jewitt/kb/migrate.html http://www.openexoplanetcatalogue.com/systems/?fields=radiusEarth&fields=namelink&fields=numberofstars&fields=numberofplanets&fields=massEarth&fields=mass&fields=radius&filters=multiplanet http://adsbit.harvard.edu/cgi-bin/nph-iarticle_query?1994A%26A...287L...9L&defaultprint=YES&filetype=.pdf https://www.universetoday.com/118421/how-do-planets-go-rogue/ https://www.lpl.arizona.edu/~renu/malhotra_preprints/1999-sciam.pdf http://www.astro.caltech.edu/~george/ay20/Ay20-Lec14x.pdf http://www.mpia.de/homes/mordasini/slidesws1123/L14migration.pdf https://www.nsf.gov/news/mmg/mmg_disp.jsp?med_id=72264&from= https://arxiv.org/pdf/1410.2478.pdf https://www.teachastronomy.com/textbook/The-Giant-Planets-and-Their-Moons/Resonance-and-Harmonics/ https://arxiv.org/pdf/1702.02494.pdf http://hosting.astro.cornell.edu/academics/courses/astro6570/orbital_resonances.pdf https://www.space.com/37176-trappist-1-planets-resonance-musical-harmony-video.html Images: https://commons.wikimedia.org/wiki/File:A_Distant_Planetary_System.jpg https://commons.wikimedia.org/wiki/File:Galilean_moon_Laplace_resonance_animation_2.gif https://commons.wikimedia.org/wiki/File:Jupiter_and_the_Galilean_Satellites.jpg https://photojournal.jpl.nasa.gov/catalog/PIA14943 https://photojournal.jpl.nasa.gov/catalog/PIA06939 https://www.asteroidmission.org/bennu-rotation_20181102/

In this week's QA, I answer if Opportunity could ever phone home, are there stars between galaxies, and who, exactly, is Chad? Featuring a special guest answer from Dr. Becky. Check out Dr. Becky's channel at: https://www.youtube.com/channel/UCYNbYGl89UUowy8oXkipC-Q 01:45 What if Opportunity phoned home? 03:11 Stars between galaxies? 04:39 Who is Chad? 05:28 Why can't we calculate the size of the Universe? 08:28 Least toxic comment section 09:15 Where does the Solar System rotation come from? 11:00 Did Panspermia happen multiple times? 12:55 Could a black hole form from molecule collisions? 15:24 What would it take to repair Opportunity? 17:26 Why can't we accelerate for 1G? Reference: https://www.quora.com/What-is-the-maximum-speed-a-chemical-rocket-can-achieve 19:28 Is Oumuamua a Von Neumann probe? 21:18 Is there anything that doesn't orbit anything? Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - [email protected]

Johannes Kepler was born on December 27, 1571, in Weil der Stadt, Württemberg, in the Holy Roman Empire of German Nationality. Kepler moved to Prague to work with the renowned Danish astronomer, Tycho Brahe. He inherited Tycho's post as Imperial Mathematician when Tycho died in 1601. Using the precise data that Tycho had collected, Kepler discovered that the orbit of Mars was an ellipse. In 1609 he published Astronomia Nova, delineating his discoveries, which are now called Kepler's first two laws of planetary motion. Kepler noticed that an imaginary line drawn from a planet to the Sun swept out an equal area of space in equal times, regardless of where the planet was in its orbit. If you draw a triangle out from the Sun to a planet’s position at one point in time and its position at a fixed time later, the area of that triangle is always the same, anywhere in the orbit. For all these triangles to have the same area, the planet must move more quickly when it is near the Sun, but more slowly when it is farthest from the Sun. This discovery (which became Kepler’s second law of orbital motion) led to the realization of what became Kepler’s first law: that the planets move in an ellipse (a squashed circle) with the Sun at one focus point, offset from the center. In 1619 he published Harmonices Mundi, in which he describes his "third law." Kepler’s third law shows that there is a precise mathematical relationship between a planet’s distance from the Sun and the amount of time it takes revolve around the Sun. Kepler’s laws of planetary motion can also be used to describe the motion of satellites in orbit around Earth. This visualization introduces Kepler’s three laws of planetary motion using satellites in orbit around Earth. Several satellite orbits of varying characteristics are examined to see how Kepler’s laws apply. This version includes titles and labels. Visualizers: Kel Elkins (lead), Horace Mitchell For more information or to download this public domain video, go to https://svs.gsfc.nasa.gov/4642#25417

Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-far-would-you-have-to-go-to-escape-gravity-rene-laufer Every star, black hole, human being, smartphone and atom are all constantly pulling on each other due to one force: gravity. So why don’t we feel pulled in billions of different directions? And is there anywhere in the universe where we'd be free of its pull? Rene Laufer details the inescapability of gravity. Lesson by Rene Laufer, directed by TED-Ed. Thank you so much to our patrons for your support! Without you this video would not be possible! rakesh Katragadda, Sergi Páez, Jørgen Østerpart, Cindy O., Nicu Boanda, Reagen O'Connor, Sabrina Gonzalez, Dino , Hadi Salahshour, Clement , Nick Debenedictis, Abdullah Altuwaijri, Jessie McGuire, Divina Grace Dar Santos, Brian Richards, Farah Abdelwahab, Mikhail Shkirev, Malcolm Callis, David Matthew Ezroj, Ever Granada, fatima kried, Begum Tutuncu, Lala Arguelles, Mehmet Sencer KARADAYI, Christian Kurch, SungGyeong Bae, Luis Felipe Ruiz Langenscheidt, Joe Huang, Rohan Gupta, Senjo Limbu, Martin Lau, Robson Martinho, Cailin Ramsey, Aaron Henson, John Saveland, Nicolle Fieldsend-Roxborough, ReuniteKorea, Venkat Venkatakrishnan, QIUJING L BU, Yoga Trapeze Wanderlust, Jaron Blackburn, Alejandro Cachoua, Thomas Mungavan, Edla Paniguel, Anna-Pitschna Kunz, Tim Armstrong, Erika Blanquez, Ricki Daniel Marbun, zjweele13 and Judith Benavides.

I break down the nature of Lagrange Points, and their applications in Sci-Fi. THE SOJOURN - AN ORIGINAL SCI-FI DRAMA: https://www.youtube.com/watch?v=I7CFTOzxsK4 SUPPORT SPACEDOCK: https://www.patreon.com/officialspacedock?ty=h FACEBOOK: https://www.facebook.com/officialspacedock/?pnref=lhc TWITTER: https://twitter.com/SpacedockHQ TWITCH: https://www.twitch.tv/spacedockhq REDDIT: https://www.reddit.com/r/officialspacedock/ SPACEDOCK MERCHANDISE: http://www.redbubble.com/people/spacedock/shop?asc=u Do not contact regarding network proposals. Battlezone II Music by Carey Chico Sci-Tech Intro Features Animated Elements by SKIBBZ. Spacedock does not hold ownership of the copyrighted materiel (Footage, Stills etc) taken from the various works of fiction covered in this series, and uses them within the boundaries of Fair Use for the purpose of Analysis, Discussion and Review.

How do you design the trajectory of a mission to the touch the sun? Johns Hopkins APL's Yanping Guo, mission design and navigation manager, explains how the alignment of the planets led to the creation of the best route for NASA's Parker Solar Probe. Learn more: https://www.nasa.gov/content/goddard/parker-solar-probe http://parkersolarprobe.jhuapl.edu/

Jen Krupp, ULA flight design engineer for the InSight mission to Mars, talks about working on the first interplanetary mission to launch from the West Coast of the U.S.

https://brilliant.org/curiousdroid/ How do spacecraft navigate in space over billions of kilometers and with split second timing during missions that last for years or decades. Here we look at how its done and the underlying principles that make it all possible. Sponsored by Brilliant.org Presented by Paul Shillito Written and Researched by Paul Shillito Images and Footage NASA, ESA, MIT, SolarSystemVideos Music by Response Data by P C III is licensed under a Attribution License. Based on a work at www.pipechoir.com source : http://freemusicarchive.org/music/P_C_III/Response_Data_1945/Response_Data

In orbital mechanics and aerospace engineering, a gravitational slingshot, gravity assist maneuver, or swing-by is the use of the relative movement and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant, time, and expense. Gravity assistance can be used to accelerate a spacecraft, that is, to increase or decrease its speed or redirect its path. Credit: CSA Follow Us: Facebook: https://goo.gl/QapZAe Twitter: https://goo.gl/RoQSmJ

2017-09-21 - Did you know that a spacecraft can use a planet’s gravity to change its orbit? For example, on September 22, 2017, the OSIRIS-REx spacecraft will use Earth’s gravity to change its orbit and help put it on course to asteroid Bennu, its target destination. With the help of this gravity assist, OSIRIS-REx is due to arrive at the asteroid in August 2018. Learn more about the OSIRIS-REx asteroid-sample return mission: http://asc-csa.gc.ca/eng/satellites/osiris-rex. (Credit: Canadian Space Agency) Useful Links The OSIRIS-REx asteroid sample-return mission: http://www.asc-csa.gc.ca/eng/satellites/osiris-rex/ Find out more about this video: http://www.asc-csa.gc.ca/eng/search/video/watch.asp?v=1_eoxgd0cn

A short animation showcasing how a circular orbit is projected as a wave on a flat map. I used a less polished version of this video in my recent kNews Space episode (https://www.youtube.com/watch?v=Y0yC1TtNXdo) and I also posted it on Reddit, where many came up with some really constructive feedback to make it better.

NASA's Cassini spacecraft, in orbit around Saturn for nearly 13 years, is beginning its Grand Finale — and it's thanks to some Crazy Engineering! A team of engineers called astrodynamicists used math and physics to plot a course for the hardy spacecraft that would send it on a series of dives through the gap between Saturn and its famous rings. And as always, the efforts of these engineers are helping to enable some truly thrilling exploration and scientific discovery. More information about Cassini's Grand Finale is available at https://saturn.jpl.nasa.gov/grandfinale

This animation shows the proposed trajectory of ESA’s Jupiter Icy Moons Explore (Juice) mission to Jupiter. Based on a launch in June 2022, the spacecraft will make a series of gravity-assist flybys at Earth (May 2023, September 2024 and November 2026), Venus (October 2023) and Mars (February 2025) before arriving in the Jupiter system in October 2029. The animation ends at the Jupiter orbit insertion point, but the planned 3.5 year mission will see Juice not only orbit Jupiter, but also make dedicated flybys of the moons Europa, Callisto and Ganymede, before orbiting the largest moon, Ganymede. More about Juice: http://sci.esa.int/juice/

Video captured in game using Universe Sandbox 2 Game website http://universesandbox.com/ Steam http://store.steampowered.com/app/230290/ WHAT IF OUR MOON HAD A MOON || universe sandbox² •• become a patron https://www.patreon.com/IrishTrekkie --- https://twitter.com/IDShenanigames 2nd channel --- https://www.youtube.com/IrishTrekkie intro - outro 8-Bit March by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://www.twinmusicom.org

The space station masses over 400 tons, so can an astronaut orbit this? And what does this question have to do with supernova? We can use Universe Sandbox 2 to simulate how the forces of gravity work down to small scales, but also how they interact in more complcated ways than most people imagine. http://universesandbox.com/

Follow me on Twitter: https://twitter.com/HellstormDe There hasn't been an update for a long time - but now there is it. This time I'm using the Bullet Plugin for dynamics simulation. Because neither Maya's nParticles nor the Bullet Plugin itself support real gravity I had to write my own per-frame-script to simulate gravity. The script calculates the gravitational force between each rigid body and then adds this force to the acceleration vector of the rigid body. The initial asteroid belt is also created by a self-written script. It creates instances from a set of predefined shapes and gives them a random initial speed, rotation, mass and size. This time I've did the simulation with 4000 rigid body. The simulation ran at a speed of ~ 0.2 frames per second on an Intel Xeon E3-1231. The length of the simulation was 400 frames and afterwards I stretched it to 1200 frames. For the final test I want to do a simulation with 10.000 rigid bodies. The background is a 32000x16000 texture showing the calculated sky/milky way from the Tycho 2 star catalogue. I've created it also using a self-written program which parses the catalog data and adds the real color temperature to each star.

Visit http://julialang.org/ to download Julia.

Want weekly Vintage Space? Don't forget to subscribe! https://www.youtube.com/vintagespace?disable_polymer=true ***There's more on this story over on my blog, Vintage Space, at Popular Science! http://www.popsci.com/why-does-rocket-need-to-roll-going-into-orbit ***There's loads of other olde timey space to dig into on Vintage Space, too! http://www.popsci.com/blog-network/vi... Breaking the Chains of Gravity, is available now in the UK, US, Canada, Australia, and India! You can order your copy on Amazon: http://www.amazon.com/Breaking-Chains... I'm also selling signed hardcover editions of my book on my website! Get your copy here: http://amyshirateitel.com/store - IT'S BACK ONLINE! 🙂 I've got a PATREON PAGE! Want to listen to a Vintage Space Podcast!? Consider becoming a patron! I've set up a Patreon account so I can raise money to buy the gear I'll need to make an awesome podcast!! https://www.patreon.com/amyshirateitel Connect on Facebook: https://www.facebook.com/amyshirateitel/ Google+: https://plus.google.com/u/0/+AmyShiraTeitel/posts Instagram: https://www.instagram.com/astvintagespace/ Twitter: https://twitter.com/astVintageSpace

I would like to have the image of the rocket refresh about the data point's position and orientation for every frame.

It’s here! Science stuff, mind-blowing stuff, Vsauce stuff, oh my!! THE CURIOSITY BOX: https://www.thecuriositybox.com/ Jake’s video about The Curiosity Box: https://www.youtube.com/watch?v=p91-GhjgeEU Minute Physics on why December days are the longest: https://www.youtube.com/watch?v=nZMMuv0Ltyo StandUpMaths on calendars and leap days: https://www.youtube.com/watch?v=qkt_wmRKYNQ Tom Scott on the Equation of Time: https://www.youtube.com/watch?v=d9Qnobvx_kM My video on what would happen if the Earth stopped spinning: https://www.youtube.com/watch?v=K0-GxoJ_Pcg GREAT visuals showing how Earth moves around the sun: https://www.youtube.com/watch?v=82p-DYgGFjI http://www.timeanddate.com/ George Washington’s birthday: https://www.archives.gov/legislative/features/washington/ real-time sub solar point location: http://rl.se/sub-solar-point Lahaina noon images from the Oahu Astrophotography club: https://www.facebook.com/OahuAstrophotoClub analemma: https://en.wikipedia.org/wiki/Analemma great solargraph and analemma images: http://analemma.pl/english-version interactive seasons and ecliptic simulator: http://astro.unl.edu/classaction/animations/coordsmotion/eclipticsimulator.html Nasa video of seasonal movement of Earth: https://svs.gsfc.nasa.gov/20063 Tropical year: https://en.wikipedia.org/wiki/Tropical_year Earth rotation specifics: https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=20196 How Earth moves through the universe: https://astrosociety.org/edu/publications/tnl/71/howfast.html http://www.slate.com/blogs/bad_astronomy/2013/03/04/vortex_motion_viral_video_showing_sun_s_motion_through_galaxy_is_wrong.html http://space.gizmodo.com/racing-while-standing-still-1558642922/1559622011 https://www.reddit.com/r/askscience/comments/1rhu7r/i_always_see_representations_of_the_solar_system minute physics on cab: https://www.youtube.com/watch?v=_mZQ-5-KYHw PBS spacetime on the cosmic microwave background: https://www.youtube.com/watch?v=3tCMd1ytvWg https://www.youtube.com/watch?v=wcBjibuHxEk CMB rest frame: http://physics.stackexchange.com/questions/25928/is-the-cmb-rest-frame-special-where-does-it-come-from https://www.reddit.com/r/AskPhysics/comments/2va4t6/does_no_absolute_reference_frame_contradict_the/ Wikipedia: https://en.wikipedia.org/wiki/Day https://en.wikipedia.org/wiki/Solar_time https://en.wikipedia.org/wiki/Sidereal_time https://en.wikipedia.org/wiki/Calendar https://en.wikipedia.org/wiki/Gregorian_calendar https://en.wikipedia.org/wiki/Calendar_reform https://en.wikipedia.org/wiki/Day_length_fluctuations https://en.wikipedia.org/wiki/Cosmic_microwave_background wikicommons images: https://en.wikipedia.org/wiki/Sundial#/media/File:Kew_Gardens_0502.JPG https://en.wikipedia.org/wiki/File:CathedralofLearningLawinWinter.jpg https://en.wikipedia.org/wiki/Miami_Beach,_Florida#/media/File:South_Beach_20080315.jpg To explore space, I highly recommend these: http://www.shatters.net/celestia/ http://en.spaceengine.org/ music by http://www.youtube.com/jakechudnow and http://www.audionetwork.com Awesome 3D graphics by Eric Langlay: https://www.youtube.com/user/ericdraven30 Lame 2D stuff by me.

Bill describes the Alignment Optical Telescope used in the Lunar Module on the Apollo missions to the moon. This telescope took star sightings which were used to align the Module's guidance system. Bill shows how the telescope used an Archimedes spiral inscribed on its eyepiece to replace the heavy motors, worm gears, and rigid tracks used in a traditional sextant -- this shaved weight from the Lunar Module and allowed it to carry more fuel. You can bundle watch Bill's videos using this playlist: https://www.youtube.com/playlist?list=PL0INsTTU1k2UO-2-AwomFmAs4nuZU9ht3 If you are interested in mechanical computers you'll likely enjoy his series on Albert Michelson's Harmonic Analyzer -- a 19th century machine that calculates Fourier transforms: https://www.youtube.com/playlist?list=PL0INsTTU1k2UYO9Mck-i5HNqGNW5AeEwq

Explaining the spinning bicycle wheel demonstration without angular momentum vectors. Physics Girl -- https://www.youtube.com/watch?v=1Tx7FgZuV3U Veritasium -- https://www.youtube.com/watch?v=ty9QSiVC2g0

Of all the possible shapes, why do all planets orbit stars in ellipses? This is known as Kepler's 1st Law of Planetary Motion, but why is it true? Using Newton's laws of gravity and motion, Ryan MacDonald - a Theoretical Astrophysicist based at Cambridge University - proves from first principles Kepler's laws of planetary motion (Part 1 of 2)

Almost 20,000 pieces of space debris are currently orbiting the Earth. This visualisation, created by Dr Stuart Grey, lecturer at University College London and part of the Space Geodesy and Navigation Laboratory, shows how the amount of space debris increased from 1957 to 2015, using data on the precise location of each piece of junk ( from https://www.space-track.org ). To see the full story, visit the Royal Institution advent calendar at: http://rigb.org/christmas-lectures/how-to-survive-in-space/a-place-called-space/7-space-debris-visualisation Find out more at http://www.stugrey.com or http://www.twitter.com/stugrey

http://www.enterprisemission.com/_articles/05-14-2004/Interplanetary_1.htm - The entire solar system - not just our one small planet -- is currently undergoing profound, never-before-seen physical changes. This paper will address and scientifically document a wide variety of significant examples, drawing from a host of published mainstream sources. We will also outline a new scientific model that, for the first time, coherently explains these simultaneous interplanetary changes via a fundamental "new Physics" - a Physics that predicts "even greater anomalies to come"...

Intermediate demonstration of virtual testbed for autonomous cubesats.

See more space related talks by Brian Troutwine from EEF17 https://www.youtube.com/watch?time_continue=1&v=pwoaJvrJE_U Slides and more info: http://www.codemesh.io/codemesh2015/brian-troutwine The Apollo Project was the first flight system to deploy with a digital, general-purpose computer at its core; the Apollo Guidance Computer (AGC). It was a complete research project: no digital computer had run consecutively for more than a few hours, sophisticated programming techniques were unknown and the human/computer interface had to be constructed to appeal to astronauts constitutionally opposed to machine interference in flight operations. In this talk I'll give the historical context for the AGC, discuss its initial design and the evolution of this design as the Apollo Project progressed. We'll do a deep-dive on the machine architecture and note how tight integration with a special-purpose vehicle admitted incredibly sophisticated behaviour from a primitive machine. We'll further discuss the human/computer interface for the AGC, how the astronaut's flight roles dictated the computer's role and vice versa. Motivating examples from select Apollo flights will be used. Throughout, we'll keep an eye on lessons to be gleaned from the experience of engineering the AGC and how we can adapt these lessons to modern computer systems in mission-critical deployments. Talk objectives: The intention of this talk is to describe the means and ways of what we now call embedded real-time software engineering in an engaging, historical context. Many of the techniques that are now dryly elaborated in textbooks were invented on the fly by engineers working on the Apollo Guidance Computer in the service of safely landing and retrieving men from the Moon. The audience is intended to learn: * systematic exploration of critical problem domains * embedded programming techniques for tiny computers * historical approaches to computing machines * the long-tail research that went into successful spaceflight to the moon Target audience: - General software engineers, people interested in spaceflight and critical systems engineers ought to enjoy the talk very much if all goes according to plan. About Brian Brian L. Troutwine is a software engineer with a focus on fault tolerance and real-time critical systems. He works extensively in Erlang and is a senior engineer with AdRoll on the real-time bidding project. Brian is likes things that go boom on failure.

This is a visualization of the trajectory designed by the ACT-ISAS team that won 1st place in the GTOC8. The theme chosen by NASA / JPL for the 8th edition of the GTOC was “high-resolution mapping of radio sources in the universe using space-based Very-Long-Baseline Interferometry (VLBI)”. Three spacecraft had to depart from the Earth and needed to perform several interferometric measurements of one of 420 radio sources. An interferometric measurement could be made when the three spacecraft lay on a plane whose normal pointed towards the radio source. Moon gravity assists and low-thrust propulsion had to be used to target each interferometric measurement. The corresponding paper: Izzo, D., Hennes, D., Märtens, M., Getzner, I., Nowak, K., Heffernan, A., ... & Sugimoto, Y. (2016). GTOC8: Results and Methods of ESA Advanced Concepts Team and JAXA-ISAS. arXiv preprint arXiv:1602.00849. http://www.esa.int/gsp/ACT/doc/MAD/pub/ACT-RPR-MAD-2016-NAPA-gtoc8_winning_trajectory.pdf

Explains why GC dist is shortest possible distance on the surface of earth. Example to calculate GC dist, initial course and final course.

@1:01 Correction: Correct Spelling is "centripetal force" @15:01 CORRECTION: A geosynchronous orbit has a rotation period of 23 hours 56 minutes and 4 seconds In this session Dr. Manishika Jain explains the concept of orbit, precession, low, medium and high orbit, polar orbit, sun-synchronous orbit and geostationary orbit. Orbit @0:16 Force @0:57 Conic Section @2:35 Basic Concept of Orbit @4:43 Precession @5:53 Precession of the Earth @6:41 Nodal Precession @8:02 Sun Synchronous @8:16 Types of Orbits @8:51 Low Orbit @9:53 Polar Orbit @9:56 Medium Orbit @11:47 Semisynchronous @12:02 Molniya Orbit @12:41 High Orbit @13:25 Geostationary Orbit @13:32 #Polar #Velocity #Gravity #Synchronous #Geostationary #Orbit #Manishika #Examrace Join our fully evaluated UPSC Geography optional test series at - https://www.doorsteptutor.com/Exams/IAS/Mains/Optional/Geography/Test-Series/, Post evaluation get personalized feedback & improvement call for each test. For IAS Postal courses refer - http://www.examrace.com/IAS/IAS-FlexiPrep-Program/ For complete geography postal course for IAS Mains Geography optional visit - http://www.examrace.com/IAS/IAS-FlexiPrep-Program/Postal-Courses/Examrace-IAS-Geography-Series.htm For complete geography postal course for CBSE NET Geography optional visit - http://www.examrace.com/CBSE-UGC-NET/CBSE-UGC-NET-FlexiPrep-Program/Postal-Courses/Examrace-CBSE-UGC-NET-Geography-Series.htm

Testing of Delta-V Maneuver

Earth=Green Moon=Yellow Satellite=Blue

Yellow=Earth's Moon Green=Earth

Earth's moon is represented by the yellow dot. Earth is represented by the green dot.

This simulation was produced using the Forward Euler Method of Numerical Integration and the Barnes-Hut Algorithm in the context of the gravitationally driven N-body problem that is a solar system's motion. Each body's initial position and velocity were obtained through an ephemeris provided by NASA's JPL. Shown in the simulation are (starting from the system's barycenter): Sun, Mercury, Venus, Earth, Moon, Mars. In this visualization Earth and its moon are barely distinguishable from each other, their system is identified by the orange dot and line. If zoomed in on the system of Earth and its moon, one would see that Earth's moon is indeed in orbit around Earth all the while both are in a heliocentric orbit.

This is the fourth video of the series"Keplerian Elements". Mean Anolay has been explained in the previous video. Link to the previous video : https://youtu.be/3X6d7XkoN90 Link to the "Kapelerian Elements" series' playlist: https://www.youtube.com/playlist?list=PLgvSYEiNhGwvkLqoot8GYLa1cujCYhy8d

This is the third video of the series "Keplerian Elements". We have featured the Perigee and apogee of an orbit, the Eccentricity vector, and the Argument of Perigee Link to the next video: https://youtu.be/y0GnQi2So4w Link to the previous video: https://youtu.be/8dbLs9Gfrts Link to the "Kapelerian Elements" series' playlist: https://www.youtube.com/playlist?list=PLgvSYEiNhGwvkLqoot8GYLa1cujCYhy8d

We've all heard the phrase gimbal lock in the movie Apollo 13, and it was a real problem on the real mission as well. But what exactly did it mean? Title image via NASA/Bruce Yarboro and Smithsonian Institution. Music "The Coup" by AudioQuattro from Music Loops. For more in depth Vintage Space, be sure to check out the blog on Popular Science: http://www.popsci.com/blog-network/vintage-space And for daily Vintage Space tidbits every day of the week, add me on Facebook, Google+, and Twitter as @astVintageSpace.

Viewing Solar System Orbital Architecture through an Extrasolar Lens - Konstantin Batygin - SETI Talks The statistics of extrasolar planetary systems indicate that the default mode of planetary formation generates planets with orbital periods shorter than 100 days, and masses substantially exceeding that of the Earth. When viewed in this context, the Solar System, which contains no planets interior to Mercury’s 88-day orbit, is unusual. Extra-solar planetary detection surveys also suggest that planets with masses and periods broadly similar to Jupiter’s are somewhat uncommon, with occurrence fraction of less than approximately 10%. In this talk, Dr. Batygin will present calculations which show that a popular formation scenario for Jupiter and Saturn, in which Jupiter migrates inward from a greater than 5AU to approximately 1.5 AU and then reverses direction, can explain the low overall mass of the Solar System’s terrestrial planets, as well as the absence of planets with a less than 0.4 AU. Jupiter’s inward migration entrained s greater than 10 − 100 km planetesimals into low - order mean-motion resonances, shepherding of order 10 Earth masses of this material into the a ∼ 1 AU region while exciting substantial orbital eccentricity (e ∼ 0.2 − 0.4). He will argue that under these conditions, a collisional cascade will ensue, generating a planetesimal disk that would have flushed any preexisting short-period super-Earth-like planets into the Sun. In this scenario, the Solar System’s terrestrial planets formed from gas-starved mass-depleted debris that remained after the primary period of dynamical evolution.

Scott reads tweets on the ISS! Tweet him and see if he replies! http://bit.ly/Twt_Scott Check out his Instagram: http://bit.ly/InstaSPACE ⇊⇊⇊⇊⇊ More info Below ⇊⇊⇊⇊⇊ Please consider following Scott on both Instagram and Twitter. This will probably be NASA's measure of how successful working with Smarter Every Day is. Follow ISS Research while he's on orbit: https://twitter.com/iss_research A special thanks to Scott Kelly http://en.wikipedia.org/wiki/Scott_Kelly_%28astronaut%29 and Reid Wiseman (Follow Reid on Twitter) http://en.wikipedia.org/wiki/Gregory_R._Wiseman https://twitter.com/astro_reid NASA footage courtesy of Devin Boldt, who also gave me a cool piece of Japanese green apple candy once. His co-workers say he's "a pretty cool dude". Comment thread on Reddit: http://bit.ly/1GCoZ0t Tweet ideas to me @SmarterEveryDay Awesome orbital animations by: http://eisenfeuer.com/ Music is "PoleCat" by A Shell In The Pit. Download it here: http://ashellinthepit.bandcamp.com/album/mammals Soyuz and ISS Graphic by: http://www.emilyweddledesign.com Beautiful Outro Timelapse by Kenneth Brandon - Dark Sky Chaser https://www.youtube.com/user/KennethBrandon Check his work out! ~~~~~~~~~~~~~~~~~~ http://www.smartereveryday.com My Instagram account: http://instagram.com/smartereveryday Patreon Support Link: http://www.patreon.com/smartereveryday Twitter: https://twitter.com/smartereveryday www.facebook.com/SmarterEveryDay ~~~~~~~~~~~~~~~~~~~ GET SMARTER SECTION: Hohmann Transfer: http://en.wikipedia.org/wiki/Hohmann_transfer_orbit Bielliptic Transfer: http://en.wikipedia.org/wiki/Bi-elliptic_transfer Soyuz http://www.spaceflight101.com/soyuz-spacecraft-information.html ISS Research is tweeted live daily http://twitter.com/iss_research More general ISS info tweeted here: http://twitter.com/Space_Station ISS Facebook page here: http://www.facebook.com/ISS ~~~~~~~~~~~~~~~~~~~~ Instead of saving for my kids' college, I make videos using the money I would have saved. The thought is it will help educate the world as a whole, and one day generate enough revenue to pay for their education. Until then if you appreciate what you've learned in this video and the effort that went in to it, please SHARE THE VIDEO! If you REALLY liked it, feel free to pitch a few dollars towards their college fund by clicking here: http://bit.ly/KidsCollege Warm Regards, Destin

Talk given by Prof. Lewin almost every year between 1996 and 2004 during the summer vacation for Science Teachers. This recording is from 1997. He discussed how to uncover the beauty of physics to students. He discusses the perception of seeing color and showed colors by using only black and white slides (the famous Edwin Land demo). He also covered (and demonstrated) Rayleigh Scattering which makes the sky blue and sunsets red. By holding cigaret smoke in his lungs he demonstrated why clouds are white.He uncovers the Physics of Rainbows and creates a rainbow during his lectures and he demonstrates (as he earlier arrived) that the rainbows are nearly 100% linearly polarized.

Have you ever wondered how a space elevator would actually work? In this short talk, Oxford Physics student Ryan MacDonald discusses the physical principles underlying space elevator design and explores their significance in allowing readily available and cheap access to space. Filmed: Oxford University Physics Society - 26th February 2015.

How do magicians levitate women? (with demo) Electric Shock Treatment (no demo) Electrocardiogram (with demo) - Pacemakers Superconductivity (with demo)- Levitating Bullet Trains Aurora Borealis, GREAT DEMOS Assignment Lecture 17, 18 and 19: http://freepdfhosting.com/885b570f3b.pdf Solutions Lecture 17, 18 and 19: http://freepdfhosting.com/f55c880397.pdf

Static Equilibrium - Stability - Rope Walker Lecture Notes, Conversion from Linear to Rotational Motion: http://freepdfhosting.com/a792cd77a8.pdf Assignments Lecture 25, 26, 27 and 28: http://freepdfhosting.com/03ca75eadf.pdf Solutions Lecture 25, 26, 27 and 28: http://freepdfhosting.com/f15cd35103.pdf

This Lecture is a MUST. Rolling Motion - Gyroscopes - Very Non-intuitive - Great Demos. Lecture Notes, Torques on Rotating Disks - Gyroscopic Behavior: http://freepdfhosting.com/c294f9033b.pdf Assignments Lecture 21, 22, 23 and 24: http://freepdfhosting.com/2e96daf94f.pdf Solutions Lecture 21, 22, 23 and 24: http://freepdfhosting.com/86109d309b.pdf

yellow arrow - quaterion rotation. red arrow - euler rotation.

http://audible.com/minutephysics EDWARD SNOWDEN book on Audible: http://www.audible.com/pd/Nonfiction/No-Place-to-Hide-Audiobook/B00MEL9RTI/ref=a_search_c4_1_1_srTtl/191-2173915-6184263?qid=1421950758&sr=1-1 MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter - @minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Music by Nathaniel Schroeder http://www.soundcloud.com/drschroeder Created by Henry Reich