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

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Planets [credit: Wikimedia Commons]
Terrestrial Planets [credit: Wikimedia Commons]
Curiosity’s view of martian soil [credit: NASA/JPL-Caltech/MSSS]
Mars Topography [credit: NASA/JPL]
Tharsis [credit: NASA / JPL-Caltech / Arizona State University]
Olympus Mons [credit: NASA]
Valles Marineris [credit: NASA/USGS]
Cappuccino swirls at Mars south pole [credit: ESA/DLR/FU Berlin / Bill Dunford]
The Mars Reconnaissance Orbiter image 1 [credit: NASA]
The Mars Reconnaissance Orbiter image 2 [credit: NASA/JPL]
Dunes, image 1 [credit: NASA/JPL-Caltech/University of Arizona]
Dunes, image 2 [credit: NASA/JPL-Caltech/Univ. of Arizona]
Serpent Dust Devil [credit: NASA/JPL-Caltech/Univ. of Arizona]
Tattooed Mars [credit: NASA, HiRISE, MRO, LPL (U. Arizona)]
Avalanche [credit: NASA/JPL/University of Arizona]
Deimos [credit: NASA/JPL-Caltech/University of Arizona]
Phobos [credit: NASA/JPL-Caltech/University of Arizona]
Mars’ Moon Phobos Eclipses the Sun, as Seen by Curiosity [credit: NASA Jet Propulsion Laboratory]
Material Excavated by a Fresh Impact and Identified as Water Ice [credit: NASA/JPL-Caltech/University of Arizona]
Crater walls [credit: NASA/JPL/Malin Space Science Systems]
Sedimentary deposit [credit: NASA/JPL-Caltech/MSSS]
Curiosity rover [credit: NASA/JPL-Caltech/MSSS]
Astronaut on Mars [credit: NASA]
Skylight [credit: NASA/JPL-Caltech/Univ. of Arizona]
Life on mars [credit: NASA/Pat Rawlings, SAIC]


Geography's Right says:

But can you see the Sun with the naked eye from Mars? Or is it still too bright?

xXx_doge_xXx says:

TIP > Melt Mars's Ice and make a colony underground = LifeInMars

xXx_doge_xXx says:

I just learned the past info and it is colder. XP

XxKINGatLIFExX says:

I want to be Mark Watney.

Helmwall says:

Wait, they need to dig 10-15 meters in the riverbed to find fossils?

bjornvb1991 says:

Earh has a megnatic field that protects us against the solar wind and also has a greenhouse effect, would it be possible to create a megnatic field by manipulating nature on Mars? I just started getting into astronomy and it's like learning a long forgotten language to me.

A Human Who is a Nerdfighter says:

Don't drink water on Mars… At least without a filter.

Angel Garcia says:

very interesting!

Big Glo 1017 says:


Mobis Dikas says:

The earth is flat

Rick Veenstra says:

I still love the idea that Mars is the only planet we know off that is inhabited solely by robots :)

ImSoSane says:

Astronomers called it Saturn cause it had a nice ring to it! :D

Jo Martensson says:

Wait, if we use the lava chambers as a base, and we get into them using the collapsed skylights, then couldn't they collapse again?

reyray says:

damn you rule Mr plait!

Kelsi R says:

ok ok so WHAT IF there was life on Mars when the atmosphere was thicker and there were large bodies of water, but the beings of the planet did what we are doing and released huge amounts of greenhouse gases into the atmosphere over a period of time, and they slowly wore down their atmosphere until it was extremely thin and all of the water evaporated.

Iris D says:

KERBALS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

crossfires says:

Aaaahh you showed us an animation of SpaceX's Falcon Heavy <3
I am supremely satisfied by that. It's going to launch and land its boosters in April! So excited

jina194 says:

Could you imagine in 1000 years people living on both mars and earth like it's the norm. Like hey mom I'm thinking about moving to mars you wanna come?

Muhammad Dzikrullah says:

any aries (and maybe scorpios) here?

xang pee says:

if we were to colonise Mars, would we have to make new timezones for mars? How many days or even weeks is Mars ahead or behind us in time…..same question kinda goes to the Moon as well

hark1993 says:

I love that little visual shout out to SpaceX. There's no other group more determined to get people to Mars

obsessedandstuff says:

there is liquid water on Mars !!!!!!!!!

Lydia Deparrie says:

i love this channel!!!!!!

Robin Didriksen says:

You guys should update this video to take account of NASA's new finds. Seasonal Liquid Water!

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