Ultraviolet Astronomy

Watch Professor Evgenya Shkolnik from Arizona State University giving a talk "The Ultraviolet Spotlight on Exoplanets" on January 25, 2021. The webinar is organized by Keck Institute for Space Studies, a 'think and do tank' that develops revolutionary new science approaches, technology and mission concepts that impact and enable future space missions. There are about seventy-five billion terrestrial planets in our one Milky Way galaxy with temperatures capable of supporting surface life. They tend to orbit stars called K and M dwarfs, which are lower in mass and temperature than our Sun. The stellar ultraviolet (UV) radiation from these stars is strong and highly variable, and their planets are exposed to “superflares” daily in their first ~300 Myr. Knowing the UV environments of planets of all sizes is crucial to understand their atmospheric composition and evolution. For temperate terrestrial planets, characterization of the UV provides a key parameter in a planet’s potential to be habitable and helps us to discriminate between biological and abiotic sources for observed biosignatures, gases we hope will be signs of life. Shkolnik will present their efforts to study the UV exoplanet environments using existing space telescopes and describing new efforts to build dedicated UV space telescopes specifically designed to provide key information needed to answer these questions: How do planet atmospheres form and evolve under various stellar conditions? What are those planet atmospheres really made of and are they like those in our Solar System? Can planets around active stars be habitable and can we accurately interpret their biosignatures? Speaker's Biography: Evgenya Shkolnik is a professor of astrophysics at the School of Earth and Space Exploration at Arizona State University. She is an expert on exoplanets and stars, including the Sun. She studies stellar activity and star-planet interactions using telescopes on the ground and in space to answer questions involving stellar evolution and planetary habitability. Professor Shkolnik continues to execute new observations with existing telescopes both on the ground and in space. She is also now designing new small space telescopes dedicated to these experiments. Professor Shkolnik's current research topics on Extrasolar Planetary Systems, Circumstellar Disks, CubeSat Astronomy include: Star-planet interactions as a probe of planetary and stellar magnetospheres. The search for and characterization of disks and planets around young M dwarfs. Identifying the young M dwarfs in the solar neighborhood for planet & disk searches. Gas emission from planetary atmospheres and debris disks. Effects of high-energy stellar radiation on the formation and evolution of planets. Evolution of planet habitability and necessary conditions for life. Building of CubeSat Telescopes

The International Ultraviolet Explorer was the first of its kind, giving us glimpses into phenomena like supernovas and Halley's comet. So why do we hear so little about it?" IUE is our Pin of the Month! Get it before Jan 31st https://store.dftba.com/products/scishow-pin-of-the-month-the-international-ultraviolet-explorer-january SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://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: Marwan Hassoun, Jb Taishoff, Bd_Tmprd, Harrison Mills, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Sam Buck, Christopher R Boucher, Eric Jensen, Lehel Kovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer ---------- 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: https://www.esa.int/Science_Exploration/Space_Science/IUE_overview https://science.nasa.gov/missions/iue http://adsabs.harvard.edu/full/1998ESASP.413...37H https://sci.esa.int/web/iue/-/31290-science-results https://swift.gsfc.nasa.gov/about_swift/uvot_desc.html https://asd.gsfc.nasa.gov/archive/mwmw/mmw_across.html https://www.nasa.gov/feature/goddard/2018/astronomers-release-most-complete-UV-survey-of-nearby-galaxies https://sci.esa.int/web/iue/-/31297-archive https://www.nytimes.com/1986/12/04/us/orbiting-observatory-sights-ice-blast-on-halley-s-comet.html https://www.latimes.com/archives/la-xpm-1986-12-07-mn-1459-story.html https://www.eso.org/sci/publications/messenger/archive/no.15-dec78/messenger-no15-27-31.pdf

I'm trying a few new things in this video. First, I'm using a new back-focus of 105 mm when using the ASI ZWO294MC-Pro camera pared with the Celestron Nexstar 6SE telescope. Im also comparing shots of the moon taken with and without the UV/IR-cut filter by Baader Planetarium. I was surprised with my end results! The Baader IR Pass VS UV/IR-Cut filter paper: https://www.baader-planetarium.com/en/downloads/dl/file/id/24/product/2974/testreview_ir_pass_uv_ir_comparison_w_paech.pdf Cloudy Nights Forum - SCT Backfocus discussion: https://www.cloudynights.com/topic/655671-asi294mc-pro-on-c8-how-do-i-set-up-backfocus-help/ To see this image in high resolution: https://www.astrobin.com/full/cvniik Follow me on: Twitter: https://www.twitter.com/CelestialVlog Instagram: https://www.instagram.com/celestialastrophotography/ Astrobin: https://www.astrobin.com/users/Shawnharv/ EQUIPMENT: Telescope: Celestron Nexstar 6SE Mount: Sky-Watcher EQ6-R Pro Reducer: Celestron 6.3 Reducer Filter: Baader UV/IR Cut Filter Camera: ZWO ASI294MC Pro Mini PC: Beelink AP34 pro Mini PC Monitor: UPERFECT Portable HDMI 7" Monitor #astrophotography #Moon #CelestialPhotography

Roughly seventy-five billion low-mass stars (a.k.a. M dwarfs) in our galaxy host one or more small planets in the habitable zone (HZ). The stellar ultraviolet (UV) radiation from M dwarfs is strong and highly variable, and impacts planetary atmospheric loss, composition and habitability. In fact, superflares occur daily in their first ~100 Myr, and these effects are amplified by the extreme proximity of their HZs. Understanding the UV environments of M dwarf planets is crucial to understanding atmospheric composition and evolution, and providing context for measured exoplanet spectra. For HZ terrestrial planets, characterization of the UV provides a key parameter in a planet’s potential for habitability as well as for discriminating between biological and abiotic sources of observed biosignatures. Our efforts to study the stellar UV span past, present and future space telescopes: the Galaxy Evolution Explorer (GALEX), the Hubble Space Telescope (HST), and the upcoming NASA-funded Star-Planet Activity Research CubeSat (SPARCS), due for launch at the end of 2021. SPARCS will be a 6U CubeSat completely devoted to continuous photometric monitoring of M stars, measuring their variability, flare rates and evolution, while also being a pathfinder for much-needed future UV missions.

Patrick talks to Prof Robert Wilson about the International Ultraviolet Explorer Satellite. First broadcast on May 7th 1989. Thanks again to James Fraser.

Sunday, 13 May 2018 One day [email protected] Astronomy Workshop Prof. Ananda Hota UM-DAE CEBS & [email protected], India Title: How Any BSc/BE Can Do citizen-science research (#ABCDresearch ) using GMRT telescope sitting @home anywhere in India. Timings: 10:00 - 10:20 Prof. Ananda Hota UM-DAE CEBS & [email protected], India Title: #SelfieWithBlackhole Abstract: 40 participants will get trained in their 1st step in becoming citizen-scientists or e-astronomers. Participants will learn to use a NASA web tool to make images using the data collected by GMRT and other telescopes. They will learn to understand UV-optical-IR-radio (RGB-C) images of galaxies. GMRT image of galaxies hosting supermassive black holes and launching giant plasma jets will be prepared in this hands-on session by the participants who will bring their laptops/tablets. Participants will post these images on social media with #SelfieWithBlackhole and tag [email protected], India & ICTS, Bangalore. Timings: 10:30 - 13:00

Did you know that astronomers can use ultraviolet light to explore and study some of the most energetic stars and galaxies in the universe? Tune in to find out more about the light outside of what our eyes can see.

On January 26, 1978, the International Ultraviolet Explorer launched into orbit on a mission to study ultraviolet light emitted by stars and other bright objects in the universe. Because a lot of that UV light is absorbed by Earth's ozone layer, astronomers needed a space-based observatory to look at it. The IUE mission allowed astronomers to study hot, bright stars, active galactic nuclei, supernova explosions and more. The mission was a joint project between NASA and the European Space Agency, and it lasted more than 18 years before budget cuts led to its decommissioning. The derelict satellite is still in orbit around the Earth today.

The World in Ultraviolet from Space Recorded from the International Space Station 1-2am Saturday 17th December 2016

There are three types of UV radiation produced by the sun – UVA, UVB and UVC. UVA - causes skin cancer and ageing UVB - causes skin cancer and burning UVC - doesn't reach the ground. It is filtered out by the Earth's atmosphere. UV radiation cannot be seen by the eye or felt on the skin. When we feel the heat of the sun we are feeling the infrared rays, not the UV radiation.

Todas as semanas, Gustavo Rojas, do Laboratório Aberto de Interatividade (LAbI) da UFSCar, apresenta dicas de como olhar para o céu, quais constelações estão em destaque, fases da lua e os principais fenômenos astronômicos. PGM 231 - International Ultraviolet Explorer Playlist Céu da Semana - https://goo.gl/S2CGSq *Assista a UNIVESP TV ao vivo, e veja nossa programação completa em http://univesp.tv.br *Sintonize a UNIVESP TV através da multiprogramação da TV Cultura. Em São Paulo o canal é o 6.2. *UNIVESP TV - O canal para quem quer saber mais e aprender sempre! ******* Confira também nossos cursos e programas: CURSOS: Cursos USP https://goo.gl/22ewSC Cursos Univesp https://goo.gl/GqRRAB Curso de Licenciatura em Ciências Naturais e Matemática https://goo.gl/VqihrU Curso de Engenharia https://goo.gl/i837vC Cursos Unicamp https://goo.gl/lWkxhT PROGRAMAS: Estúdio Univesp (Programas de entrevistas) https://goo.gl/wuPlNq Para saber mais e aprender sempre! https://goo.gl/dSpNxW Encontros: Seminários, Debates, Simpósios, Congressos e Reportagens Especiais https://goo.gl/Khy4h5 Séries, Filmes e Documentários Internacionais https://goo.gl/Fudz49 *******

Episode 3 of 5 Check us out on iTunes! http://testtube.com/podcast Please Subscribe! http://testu.be/1FjtHn5 The amount of the electromagnetic spectrum that humans can perceive is extremely small. So to see the rest we built telescopes that could see it all. But how do they work? + + + + + + + + Previous Episode: Galileo Didn't Invent The Telescope... Sorry.: https://www.youtube.com/watch?v=FVdmHxZE3hM&list=PLwwOk5fvpuuJrG-gYpuz_qqcVZrIXgR2z&index=2 + + + + + + + + Sources: The Electromagnetic Spectrum: http://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html "The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes - the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation." Why We Need Different Types Of Telescopes To Look At Outer Space: http://science.nasa.gov/science-news/science-at-nasa/1999/features/ast20apr99_1/ "By studying the electromagnetic emissions of objects such as stars, galaxies, and black holes, astronomers hope to come to a better understanding of the universe." Infrared Telescope: http://www.britannica.com/science/infrared-telescope "Infrared telescope, instrument designed to detect and resolve infrared radiation from sources outside Earth's atmosphere such as nebulae, young stars, and gas and dust in other galaxies." How Does an Infrared Telescope Work?: http://www.ehow.com/how-does_4926827_infrared-telescope-work.html "Infrared telescopes use fundamentally the same components and follow the same principles as visible light telescopes; namely, some combination of lenses and mirrors gathers and focuses radiation onto a detector or detectors, the data from which are translated by computer into useful information." Hubble's Amazing Optics: http://hubblesite.org/the_telescope/nuts_.and._bolts/optics/ "What gives Hubble such remarkable eyesight? What makes its pictures of distant objects so sharp?" X-ray Telescopes: http://imagine.gsfc.nasa.gov/science/toolbox/xray_telescopes1.html "Creating a telescope to image and focus X-rays might seem like it should be an easy task. After all, scientists focus light all the time. In fact, lenses are all around us everyday. People wear glasses and contact lenses to correct their vision by altering the path of light into their eyes to focus correctly on their retinas." How Gamma Ray Telescopes Work: http://phys.org/news/2014-09-gamma-ray-telescopes.html "Yesterday I talked about the detection of gamma ray bursts, intense blasts of gamma rays that occasionally appear in distant galaxies. Gamma ray bursts were only detected when gamma ray satellites were put into orbit in the 1960s." + + + + + + + + TestTube Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topics they love. Host Trace Dominguez digs beyond the usual scope to deliver details, developments and opinions on advanced topics like AI, string theory and Mars exploration. TestTube Plus is also offered as an audio podcast on iTunes. + + + + + + + + Trace Dominguez on Twitter https://twitter.com/TraceDominguez TestTube on Facebook https://facebook.com/testtubenetwork TestTube on Google+ http://gplus.to/TestTube + + + + + + + +

Nasa released stunning footage of the sun in ultra high definition, called 'Thermonuclear art'. Nasa captured the images from the Solar Dynamics Observatory. There, an image is taken every 12 seconds, in 10 different wavelengths of invisible ultraviolet light. Each of those wavelengths is assigned an individual color, providing the different sets of images seen in the video. Accompanying the video, Nasa Goddard - the space flight center - said, "Presented in ultra-high definition video (4K) the video presents the nuclear fire of our life-giving star in intimate detail, offering new perspective into our own relationships with grand forces of the solar system." The video lasts around 30 minutes, with the above being an accelerated version. You can watch the full version here: https://www.youtube.com/watch?v=6tmbeLTHC_0 Subscribe our channel for the latest news and timely updates from China. Twitter: https://twitter.com/PDChina Facebook: https://www.facebook.com/PeoplesDaily Instagram: https://instagram.com/peoples_daily/ Website: http://en.people.cn/

(24 Jun 1999) Natural Sound Astronomers are hoping their latest tool to study the universe will give them a better understanding of what the universe was like moments after creation. NASA on Thursday launched an ultraviolet telescope atop an unmanned Delta rocket. The Far Ultraviolet Spectroscopic Explorer, or FUSE, will orbit 768 kilometres (480 miles) above the earth and peer into the farthest corners of the Milky Way galaxy. The Far Ultraviolet Spectroscopic Explorer, or FUSE, that sits atop this Delta rocket is designed to give astronomers a better idea of what the universe was like moments after it was created. FUSE will peer into the farthest corners of the Milky Way galaxy as it orbits 480 miles above the earth. The three-year, U-S 214 (m) million dollar mission will measure the abundance of deuterium which was created along with the rest of the universe in the so-called Big Bang 12 (b) billion or more years ago. By measuring how much deuterium - described as a "cosmic fossil" - exists, scientists can delve back in time to determine the original make-up of the universe. FUSE will begin its observations in three months. Find out more about AP Archive: http://www.aparchive.com/HowWeWork Twitter: https://twitter.com/AP_Archive Facebook: https://www.facebook.com/APArchives ​​ Instagram: https://www.instagram.com/APNews/ You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/320e148e77ff3f424a44fcbcc33b62fc

In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, density, spin, motion, and chemical composition. Crash Course Chemistry posters are available at DFTBA.com http://www.dftba.com/crashcourse -- Table of Contents Light is a Form of Energy 0:39 Wavelength Tells Us Its Energy and Color 0:59 Spectroscopy 7:28 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter: https://twitter.com/badastronomer Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse -- PHOTOS/VIDEOS Wavelengths http://imagine.gsfc.nasa.gov/educators/gammaraybursts/starchild/Image6.gif [credit: Imagine the Universe! / NASA] Observatories across spectrum http://imagine.gsfc.nasa.gov/Images/science/observatories_across_spectrum_full.jpg [credit: Imagine the Universe! / NASA] Red hot spiral hotplate http://freefoodphotos.com/imagelibrary/cooking/slides/hot_electric_cooker.html [credit: freefoodphotos.com] The Crab Nebula http://en.wikipedia.org/wiki/Nebula#/media/File:Crab_Nebula.jpg [credit: NASA, ESA, J. Hester and A. Loll (Arizona State University)] Building the Space Telescope Imaging Spectograph http://imgsrc.hubblesite.org/hu/gallery/db/spacecraft/18/formats/18_print.jpg [credit: NASA] VST images the Lagoon Nebula http://en.wikipedia.org/wiki/Lagoon_Nebula#/media/File:VST_images_the_Lagoon_Nebula.jpg [credit: ESO/VPHAS+ team] Jupiter http://www.nasa.gov/images/content/414987main_pia09339.jpg [credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute] Venus http://en.wikipedia.org/wiki/Atmosphere_of_Venus#/media/File:Venuspioneeruv.jpg [credit: NASA - NSSDC Photo Gallery Venus] Ring Around SN 1987a, image 1 http://www.spacetelescope.org/images/opo9714e/ [credit: Jason Pun (NOAO) and SINS Collaboration] Ring Around SN 1987a, image 2 http://www.spacetelescope.org/images/opo9714a/ [credit: George Sonneborn (GSFC) and NASA/ESA]

Discussing UV Light with Dr Meghan Gray. Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/#!/periodicvideos This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Sixty Symbols videos by Brady Haran

On 3 June 2014, the Hubble Space Telescope team revealed their newest masterpiece: Ultra Deep Field 2014. This image is composed of 841 orbits of Hubble Time, each a 90-minute exposure, from 2003 to 2012 allowing us to see the very early Universe in a wide band of light. The deep field images are long exposures taken in the visible and near-infrared wavelengths, but now we have something more: the Ultraviolet. For more information about this image, head to: http://hubblesite.org/newscenter/archive/releases/2014/27/image/a/ Written & Narrated by Scott Lewis (@ScientificScott) All visuals by NASA/ESA/Hubble Musice: Kevin MacLeod - Winter Chimes Follow DeepAstronomy on Google+ http://google.com/+DeepAstronomy http://google.com/+TonyDarnell http://google.com/+ScottLewis We also have a great Google+ Community, come share your thoughts and join the discussion! https://plus.google.com/communities/109849939648748938781

Astronomers at NASA's Goddard Space Flight Center in Greenbelt, Md., and the Pennsylvania State University in University Park, Pa., have used NASA's Swift satellite to create the most detailed surveys of the Large and Small Magellanic Clouds, the two closest major galaxies, in ultraviolet light. Thousands of images were assembled into seamless portraits of the main body of each galaxy to produce the highest-resolution surveys of the Magellanic Clouds at ultraviolet wavelengths. The project was proposed by Stefan Immler, an astronomer at Goddard. The Large and Small Magellanic Clouds, or LMC and SMC for short, lie about 163,000 and 200,000 light-years away, respectively, and orbit each other as well as our own Milky Way galaxy. Compared to the Milky Way, the LMC has about one-tenth its physical size and only 1 percent of its mass. The SMC is only half the size of the LMC and contains about two-thirds of its mass. The new images reveal about a million ultraviolet sources within the LMC and about 250,000 in the SMC. Viewing in the ultraviolet allows astronomers to suppress the light of normal stars like the sun, which are not very bright at these higher energies, and provide a clearer picture of the hottest stars and star-formation regions. Only Swift's Ultraviolet/Optical Telescope, or UVOT, is capable of producing such high-resolution wide-field multi-color surveys in the ultraviolet. The LMC and SMC images range from 1,600 to 3,300 angstroms, UV wavelengths largely blocked by Earth's atmosphere. The Large and Small Magellanic Clouds are readily visible from the Southern Hemisphere as faint, glowing patches in the night sky. The galaxies are named after Ferdinand Magellan, the Portuguese explorer who in 1519 led an expedition to sail around the world. He and his crew were among the first Europeans to sight the objects. All visible light imagery provided by Axel Mellinger, Central Michigan University. This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/goto?11293 Like our videos? Subscribe to NASA's Goddard Shorts HD podcast: http://svs.gsfc.nasa.gov/vis/iTunes/f0004_index.html Or find NASA Goddard Space Flight Center on facebook: http://www.facebook.com/NASA.GSFC Or find us on Twitter: http://twitter.com/NASAGoddard