now it's a little bit more I want to say about Mars we're basically done with Mars itself does anybody know if Mars has any moons does Mars have any moons two moons okay yes Marit has two moons and I'm gonna show you a picture of them right now let me go down here we go here is a close-up picture of Mars as two moons okay now if we look here what do these look like what do these moons look like what do these moons look like asteroids yes and that makes sense they look a lot like asteroids and if we look here at the size these are way smaller than our moon by a lot this is only four kilometres right here so that's maybe 12 kilometers wide for Phobos here and damos over here is maybe uh maybe 12 kilometers wide so these are very small moons if you were standing on the surface of of Mars you would probably have a real hard time seeing these moons in the sky they would look like little dots like stars and the reason they look like asteroids is if you remember in class back when you know we were allowed to go to campus we talked about where these where these moons came from these are probably captured asteroids from the asteroid belt okay these are probably captured asteroids from the asteroid belt another reason that we think that they're captured asteroids is that their their orbits are very very unstable Phobos here has an orbit that slowly shrinks every time it goes around Mars so what does that mean will eventually happen to Phobos if its orbit shrinks every time it goes around Mars yes one day after millions and millions of years eventually Phobos will land on Mars and is that's gonna be a big deal when that eventually happens because this particular asteroid right here or this former asteroid this moon is a little bit bigger than the asteroid that killed the dinosaurs so we'll get to kind of see what that looks like a little bit we'll probably have satellites set up to take close-up videos of that as it goes on we probably don't want to get those satellites anywhere close to that impact though because what will happen what will happen if we put a satellite too close to that impact oh yeah it'll definitely be a waste of money because it will it will be vaporized somebody said Dustin Rock could Dustin rock could destroy it at a far distance but if it's really close it could just get vaporized by the heat and light that comes out of that particular eruption so we don't want to put like a rover near it because it'll be vaporized somebody's asking when it will happen we will definitely not be alive it's losing a few inches every year give or take and I'm not exactly exactly sure exactly how much distance it's you losing every year but it's small like that so it's gonna take millions of years for this to hit and it's actually possible that damos over here it looks like it might have an orbit that's getting bigger every year so what does that mean what eventually happen to damos right here if daymo says orbit gets bigger every year what will maybe happen to damos yeah if it gets too far away from the gravity of Mars it will essentially be just flung back out into space so if you wait long enough Mars might not have any moons anymore oh and by the way Phobos and Deimos here the names come from Greek mythology these are both gods that served the God of War which makes sense because Mars is the God of War does anybody know what Phobos is the god of there is a modern word in English that comes from this word that should help you figure out what that's the god of yeah Phobos is the god of fear that that Greek gods name is actually where the word phobia comes from and as somebody in one of the classes posted damos over here is the god of terror so the god of fear and the god of terror serve the god of war which makes sense if you think about it and Oh last thing I should say about these moons what would it be a good idea to go out and just take a walk on these moons would that be a good idea no it would be a very bad idea it might be fun for a second but these things are way way way smaller than our moon what does that mean for and that's in terms of mass and size what does that mean for the amount of gravity these moons have what's the amount of gravity these guys have compared to our moon right some people are seeing why this would be a bad idea these guys have very low gravity so if you tried to walk on them and tripped over your own foot that would be enough for you to fly off in his face so if I was just like hey guys how's it going and I like like hit the back of one of my feet with my other foot I just whoa oh so it's very very easy to accidentally fly off into space if you're trying to walk on these moons so we're not when we send people to go hang out on Mars we're never gonna try to get somebody to walk on this because that's just a death sentence you'll be lost to space unless you're tied down