The Moons of Mars Explained -- Phobos & Deimos MM#2
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The Moons of Mars explained -- Phobos & Deimos
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Where did the Martian Moons Come From?
One of the greatest unresolved mysteries in Planetary Science is how the moons of Mars, Phobos and Deimos, formed. What theories are there? How can we tell which one is right? How might a sample return mission to the moons of Mars work?
-----Further information and references-----
*ESA CDF-145(A) Phobos sample return mission feasibility study:
*A recent review of the composition of Phobos and Deimos:
Pieters, C.M., Murchie, S., Thomas, N., Britt, D. (2014), Composi-tion of surface materials on the Moons of Mars, Planet. Sp, Sci., 102, 144-151, doi:10.1016/j.pss.2014.02.008.
(Google doi reference to find pdf of papers)
*Review of Phobos formation theories:
Rosenblatt, P. (2011), The origin of the Martian moons revisited, Astron. Astrophys. Rev, 19, 1–26, doi:10.1007/s00159-011-0044-6.
*The value of Phobos sample return:
Murchie, S.L., Britt, D.T., Pieters, C.M. (2014), The value of Phobos sample return, Planet. Space Sci., 102, 176-182, doi:10.1016/j.pss.2014.04.014.
******Figure references in video*****
*Early observation of Phobos:
Tolson, R.H., et al. (1978), Viking first encounter of Phobos: Pre-liminary results, Science 199, 61-64, doi:10.1126/science. 199.4324.61
Pang, K., Pollack, J., Veverka, J., Lane, A., Ajello, J. (1978), The composition of Phobos: evidence for carbonaceous chondrite surface from spectral analysis, Science, 199, 64–66, doi:10.1126/science.199.4324.64.
Thomas, P. (1979), Surface features of Phobos and Deimos, Icarus, 40, 223–243, doi:10.1016/0019-1035(79)90069-1.
*Phobos 1 and 2:
Avanesov, A., et al. (1989), Television observations of Phobos: first results, Nature, 341, 585–587, doi:10.1038/341585a0.
Ksanfomality, L.V., Moroz, V.I., Bibring, J.P., Combes, M., Soufflot, A., Ganpantzerova, O.F., Goroshkova, N.V., Zharkov, A.V., Nikitin, G.E., Petrova, E.V (1989), Spatial variations in thermal and al-bedo properties of Phobos's surface, Nature, 341 , 588–591, doi:10.1038/341588a0.
Marov, M.Ya., Avduevsky, V.S., Akim, E.L., Eneev, T.M., Kremnev, R.S., Kulikov, S.D., Pichkhadze, K.M., Popov, G.A., Rogovsky, G.N. (2004), Phobos-Grunt: Russian sample return mission, Adv. Sp. Res., 33, 2276–2280, doi:10.1016/S0273-1177(03)00515-5.
*Desiccated Phyllosilicates on Phobos?
Fraeman, A.A., et al. (2014), Spectral absorptions on Phobos and Deimos in the visible/near infrared wavelengths and composi-tional constraints, Icarus, 229C, 196–205, doi: 10.1016/ j.icarus.2013.11.021.
*Asteroid capture hypothesis:
Hunten, D.M. (1979), Capture of Phobos and Deimos by pho-toatmospheric drag, Icarus, 37, 113–123, doi:10.1016/0019-1035(79)90119-2.
Sasaki, S. (1990), Origin of Phobos – Aerodynamic drag capture by the primary atmosphere of Mars, Lunar Planet. Sci., 21, 1069.
Burns, J.A. (1992), Contradictory clues as to the origin of the Martian moons, Univ. Arizona Press,Tucson, Arizona, USA, pp. 1283–1301.
*Giant impactor hypothesis:
Singer, S.F. (1966), On the origin of the martian satellites Phobos and Deimos, Dollfus, A. (Ed.), Moon and Planets, COSPAR Sev-enth Int. Space Sci. Symp., Vienna, 317–321.
Craddock, R.A. (2011), Are Phobos and Deimos the result of a giant impact? Icarus, 211, 1150–1161, doi:10.1016/ j.icarus.2010.10.023.
10 Amazing Facts About Deimos (Moon of Mars)
Deimos is the smaller and outer of the two natural satellites of the planet Mars, the other being Phobos. Deimos has a mean radius of 6.2 km (3.9 mi) and takes 30.3 hours to orbit Mars.
Deimos (moon) - Video Learning - WizScience.com
"Deimos" is the smaller and outer of the two natural satellites of the planet Mars with a mean radius of 6.2 km, the other being Phobos. Deimos takes 30.3 hours to orbit Mars. The name "Deimos" is pronounced , or sometimes or like the Greek . In Greek mythology, Deimos was the twin brother of Phobos and personified Terror.
Deimos was discovered by Asaph Hall, Sr. at the United States Naval Observatory in Washington, D.C on 12 August 1877, at about 07:48 UTC . Hall also discovered Phobos on 18 August 1877, at about 09:14 GMT, after deliberately searching for Martian moons.
It is named after Deimos, a figure representing dread in Greek Mythology. The names, at first spelled "Phobus" and "Deimus", were suggested by Henry Madan , Science Master of Eton, from Book XV of the "Iliad", where Ares summons Dread and Fear .
Deimos, like Mars's other moon, Phobos, has spectra, albedos and densities similar to those of a C- or D-type asteroid. Like most bodies of its size, Deimos is highly non-spherical with triaxial dimensions of 15 × 12.2 × 11 km, making it 0.56 times the size of Phobos. Deimos is composed of rock rich in carbonaceous material, much like C-type asteroids and carbonaceous chondrite meteorites. It is cratered, but the surface is noticeably smoother than that of Phobos, caused by the partial filling of craters with regolith. The regolith is highly porous and has a radar-estimated density of only 1.471 g/cm 3 . The two largest craters, Swift and Voltaire, each measure about 3 km across.
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Pascal Lee - MISSION TO PHOBOS AND DEIMOS: Exploring the Moons of Mars (SETI Talks)
After five decades of spacecraft exploration of the Solar System, the origin of two moons of Mars, Phobos and Deimos, remains a perplexing mystery. Are they a) captured asteroids, b) remnants of Mars's formation, or c) reaccreted impact ejecta from Mars? These small bodies lie at the crossroads of a wide range of outstanding issues in solar system research, and elucidating their origin tests our understanding of planet formation and solar system evolution, including the question of how water and organics became available on Earth. Meanwhile, Phobos and Deimos are emerging as key stepping stones in the future human exploration of Mars. Dr. Lee's talk will cover the history of our efforts to understand Phobos and Deimos, and new prospects in their exploration.
Mars Moon, Deimos, Anomalies.
Hey Guys ..... I have done a video of the Bigger moon, Phobos, and its anomalies. Now, this is the other moon, (one of only 2 moons of Mars), Deimos. There is a couple of funky anomalies on this little moon. Take a look and tell me what you guys think. As always, thanks for watching!
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** These pictures are made public to the people**
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NASA / University of Arizona Link: http://hirise.lpl.arizona.edu/deimos.php
Curiosity Sees Martian Moons: Phobos and Deimos | Time-Lapse Video
Learn more about Mars' moons: http://goo.gl/ycthbW
The Mars Science Laboratory used its Mast Camera to photograph the larger moon Phobos occult the smaller Deimos. 41 images taken on Aug. 1st, 2013 are compiled and time-lapsed (real-time was 55 seconds).
Two Moons Passing in the Martian Night
This sped-up movie from the Curiosity rover shows Phobos (the larger of Mars' two moons) passing in front of smaller Deimos. Credit:
NASA/JPL-Caltech/Malin Space Science Systems/Texas A&M Univ.
Phobos & Deimos: Moons of the Solar System (2/4)
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Named after the Greek gods of fear and dread, Mars's two moons remained undiscovered until the late 19th century. Since the start of the Space Race they've been minor supporting characters in our quest to understand the Red Planet, but an ambitious new mission may be about to move them centre stage. Archive footage appears courtesy of Footagevault.
(Part 2 of 4)
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Deimos, Mars' other moon.
This moon is also the setting for Doom episode 2. A good view of this interesting moon.
Mars Express ten year highlights
The journey of Mars Express, from drawing board through launch, to its key science highlights during ten years of operations. With its suite of seven instruments, Mars Express has studied the subsurface of the Red Planet to the upper atmosphere and beyond to the two tiny moons Phobos and Deimos, providing an in depth analysis of the planet's history and returning stunning 3D images.
Deimos Mars,Anaglyph 3D rotation
voici une petite vidéo du satellite naturel de mars "Deimos" en rotation en version 3D anaglyphe.
here's a video of the natural satellite mars "Deimos" in rotation in 3D anaglyph versions.
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le 8 AOUT 2016
RP-0 Tutorial Campaign Part 65: Phobos and Deimos Satellites
In this video we continue our operations around Mars, setting up the SAR altimetry probes and the Phobos and Deimos orbiters and landers. However we have an even worse Kraken attack than last episode. -- Watch live at https://www.twitch.tv/nathankell
2016-05-24 Mars with Moon Deimos, 300x timelapse
Mars and moon Deimos as 300xtimelapse. Film is centered at mars, so that the both stars and wandering from right to left. The moon Deimos is fixed to Mars, but slightly moving north due to rotation around Mars.
The film is repeated with a grid to show this and then both 5x repeated to show it better.
About 500 images, each 1s with about 12s download time at C95 station in southern France with a 0.60-m(f3.2 and STL-11000, bin1.
Movie of Mars, Deimos and Phobos
Description in the video
A Trip to Deimos
An animated tour of the Martian moon of Deimos!
Mars and its Moons
An AstroGrav video that shows a simulation of Mars and its two moons, Phobos and Deimos, from 2015 to 2021.
You can watch the changing size, brightness, and phase of Mars, as well as the changing aspect of the moons' orbits. In particular, Mars appears much bigger and brighter than usual at the three oppositions in May 2016, July 2018, and October 2020. The Sun can be seen flashing past when Mars is at conjunction - on the opposite side of the Sun to the Earth - in July 2017 and September 2019. To give an idea of scale, the apparent diameter of the full moon would be about twelve times the width of this video.
Phobos and Deimos may have been created by a giant asteroid the size of Pluto hitting the red planet
Martian moon mystery: Phobos and Deimos may have been created by a giant asteroid the size of Pluto hitting the red planet
The Red Planet's tiny, misshapen moons Phobos and Deimos are widely believed to be captured asteroid - but a new theory claims they may once been part of the red planet.
Researchers modelled the effect of a giant impact on the red planet - and now believe it may have formed the moons.
Target: The Moons of Mars
How and Why should we explore the moons of Mars?
Senior NASA leadership has often observed that humans are closer to their first mission to Mars than ever before in history. As part of current thinking of human exploration of the Red Planet, a number of scientists and engineers argue that the planet’s moons are exciting goals in their own right.
Join Tony Darnell, Harley Thronson and Alberto Conti as they discuss with Pascal Lee (Mars Institute, SETI Institute, & NASA Ames Research Center) the ‘how’ and ‘why’ of exploring the moons of Mars.
The best place to watch the hangout will be on YouTube, broadcast on the Deep Astronomy Channel.
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