Could the Ice/Water found on Mars by the phoenix lander come from......?

Question

Comets that hit the planet billions of years ago when the planet was still geologically young?

Answer 1

yes, it could. But we don't know how much water there is, though it's likely to be a lot, if you look at the size of the poler ice caps. If that's all water, then it's unlikely that all of that came from comets.  

Answer 2

yes.

Answer 3

alien pee lol

Answer 4

Towering volcanoes on the Martian surface attest to a violent past. Researchers don't know if volcanic activity continues today, but many suspect it might. If so, here's how they say water would get to the surface: Hot molten rock, called magma, is generated deep down. It rises until it meets cooler rocks that contain hydrogen-bearing minerals. These minerals decompose when heated by the magma and the hydrogen is released, dissolving in the magma and forming water.

Answer 5

Yes. In fact, it's likely that much of the water on Mars's surface (as well as much of our own water here on Earth) arrived from asteroid impacts, although the amount from comets is probably much less. Remember, all the planets were orginally formed from rocks colliding with each other until they got big enough to make a planet, so it's really more a matter of defining at what point planet formation ends and incidental impacts begin.