Mars: Crash Course Astronomy #15
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The fourth planet from the sun and the outermost of the terrestrial planets, Mars has long been a popular spot for missions and imagination. Phil walks you through the planet's topography, core, and features. We'll take a look back to Mars's past and makes predictions for its future, including the possibilities for human life. -- Table of Contents Mars is Colder and Smaller Than Earth 0:56 Polar Ice Caps 3:29 Rusty & Dusty 1:16 Huge Volcanoes 2:32 Mars’s Past Geography 6:33 -- 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 -- PHOTO/VIDEO SOURCES Planets https://en.wikipedia.org/wiki/Solar_System#/media/File:Planets2013.jpg [credit: Wikimedia Commons] Terrestrial Planets https://en.wikipedia.org/wiki/Venus#mediaviewer/File:Terrestrial_Planets_Size_Comp_True_Color.png [credit: Wikimedia Commons] Curiosity’s view of martian soil https://en.wikipedia.org/wiki/Martian_soil#/media/File:PIA17944-MarsCuriosityRover-AfterCrossingDingoGapSanddune-20140209.jpg [credit: NASA/JPL-Caltech/MSSS] Mars Topography http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA02820 [credit: NASA/JPL] Tharsis http://upload.wikimedia.org/wikipedia/commons/thumb/2/22/Tharsis_-_Valles_Marineris_MOLA_shaded_colorized_zoom_32.jpg/1280px-Tharsis_-_Valles_Marineris_MOLA_shaded_colorized_zoom_32.jpg [credit: NASA / JPL-Caltech / Arizona State University] Olympus Mons http://upload.wikimedia.org/wikipedia/commons/0/00/Olympus_Mons_alt.jpg [credit: NASA] Valles Marineris https://en.wikipedia.org/wiki/Valles_Marineris#/media/File:Mars_Valles_Marineris.jpeg [credit: NASA/USGS] Cappuccino swirls at Mars south pole http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2015/02/cappuccino_swirls_at_mars_south_pole/15243840-1-eng-GB/Cappuccino_swirls_at_Mars_south_pole.jpg [credit: ESA/DLR/FU Berlin / Bill Dunford] The Mars Reconnaissance Orbiter image 1 http://static.uahirise.org/images/2015/details/cut/ESP_039148_1980.jpg [credit: NASA] The Mars Reconnaissance Orbiter image 2 http://photojournal.jpl.nasa.gov/figures/PIA19127_fig1.jpg [credit: NASA/JPL] Dunes, image 1 http://mars.jpl.nasa.gov/gallery/press/20090317a/ESP_011909_1320.jpg [credit: NASA/JPL-Caltech/University of Arizona] Dunes, image 2 http://www.nasa.gov/sites/default/files/pia17981.jpg [credit: NASA/JPL-Caltech/Univ. of Arizona] Serpent Dust Devil http://www.nasa.gov/mission_pages/MRO/multimedia/pia15116.html [credit: NASA/JPL-Caltech/Univ. of Arizona] Tattooed Mars http://www.nasa.gov/multimedia/imagegallery/image_feature_1500.html [credit: NASA, HiRISE, MRO, LPL (U. Arizona)] Avalanche http://www.uahirise.org/ESP_016228_2650 [credit: NASA/JPL/University of Arizona] Deimos https://en.wikipedia.org/wiki/Moons_of_Mars#/media/File:Deimos-MRO.jpg [credit: NASA/JPL-Caltech/University of Arizona] Phobos https://en.wikipedia.org/wiki/Moons_of_Mars#/media/File:Phobos_colour_2008.jpg [credit: NASA/JPL-Caltech/University of Arizona] Mars' Moon Phobos Eclipses the Sun, as Seen by Curiosity https://www.youtube.com/watch?v=OyZoD7BRTtg [credit: NASA Jet Propulsion Laboratory] Material Excavated by a Fresh Impact and Identified as Water Ice http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA12220 [credit: NASA/JPL-Caltech/University of Arizona] Crater walls http://www.nasa.gov/externalflash/mgs-20061206/hi-resjpgs/1.jpg [credit: NASA/JPL/Malin Space Science Systems] Sedimentary deposit http://mars.nasa.gov/msl/images/mars-curiosity-rover-mastcam-sedimentary-deposit-lakebed-rocks-pia19074-full.jpg [credit: NASA/JPL-Caltech/MSSS] Curiosity rover http://photojournal.jpl.nasa.gov/jpeg/PIA16764.jpg [credit: NASA/JPL-Caltech/MSSS] Astronaut on Mars http://www.nasa.gov/images/content/114626main_image_feature_326_ys_full.jpg [credit: NASA] Skylight http://static.uahirise.org/images/2011/details/cut/ESP_019351_1795_a.jpg [credit: NASA/JPL-Caltech/Univ. of Arizona] Life on mars http://www.nasa.gov/images/content/107427main_image_feature_261_ajhfull.jpg [credit: NASA/Pat Rawlings, SAIC]
Comments
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Can anyone suggest good books on Astrophysics which also along with theory stuffs contains mathematical proofs and theorems? *Quantum Astrophysics
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as much as I want to go to Mars, we still should deal with that Phobos problem.
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Hai crash course, I loved watching this video. But I have a question: If mars were once wet for such long time, how could there be no evidence of plant or microorganism ever lived there? Were the organic ingredients insufficient? Thank you.
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can't we mine Phobos or just blow it up it's a total of 9 miles.
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one of the best video in the series. Thank you!
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Of course there was intelligent life on Mars! It was proven when one of the rover vehicles found a rusty bike and a shopping trolley in one of the canals!
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"Mars is red. That's a profound statement, and one that's not really all that obvious."
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Thank you very much, Phil Plait and the others at CrashCourse Astronomy, for making this wonderful video about Mars! I really do hope that we manage to send humans to Mars and that we build a civilisation on the planet, and I do think it is going to happen in my life time. I am only 14 so far, so they have plenty of time!
So Mars has a really thin atmosphere, but it has an atmosphere, that is mostly comprised of carbon dioxide (COˇ2). How much for that atmosphere is oxygen? I think I have known the precentedge before but I have forgotten it.
EDIT: Oh, also, I love those ghosts on Mars! -
Mars didn't invade Earth.
EARTH INVADED MARS! -
Does anyone else does not see the red on Mars. I know people say it's red but I have a hard time seeing the red. 🤔🤔🤔
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you forgot to mention the demons
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mars is the bestest so far
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Confirmed just 7 months after the video....
liquid water on mars -
Two ways Venus would kill you (assuming that you are in a cloud city where the atmospheric pressure is pleasant):
- Asphyxiation
- Dissolving in the acid clouds
Solution? Air tank and acid-proof clothing.
Two ways Mars would kill you:
- Cancer from solar radiation
- Bones falling apart due to the low gravity of 0.4g
Solution? You'd need to terraform it somehow, add an atmosphere to absorb the radiation and somehow increase the surface gravity.
Venus = better option -
So informative! I loved this episode about mars! To think that it has a canyon so large!
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Can i just say that your intro has the most perfect timing. It has just few seconds so it is worthless to move to speed it up or jump over it but still it is a nice introduction to the series. Brilliant job!
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if i remember ..maybe.. ok about magnetohydrodynamo and earth magnetic polarity reversal, they go something like below
rotating neutral plasma does not produce B-field.
rotating neutral liquid metal does not produce B-field.
rotating neutral solid metal does not produce B-field.
but lab doers sneakily put some currents in the dynamo to seperate the charges. i dont know what to call this anymore. -
you said something like this
venus has no magnectic field because its slow rotation made no magnetic dynamo
mars has no magnectic field because its fast rotation made no magnetic dynamo somehow.
i need more explaination, venus and mars things seem contradictory.
earth example,
earth escape velocity ~ 11000 m/sec
average air molecule speed ~ 3500 m /sec at maybe ...room temperature
therefore gravity will bind them.
so why does B- field matter much?
is it possible to give the venus's molecule's velocity due to the thermal equillbrium and the venus's molecule's velocity due to the solar wind's momentum transfer by radiation pressure -
This is very interesting but humans still shouldn't travel to Mars before 2028.
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Did any one see a stardestroyer in the background in the beginning
10m 12sLenght
8340Rating