Gas Giants because they do not have a solid surface to land on.
The outer planets are gas giants, made mostly or entirely of gas, so either there is no surface to land on, or even if there is, it lies underneath such a large amount of atmosphere that the atmospheric pressure would crush any spaceship that tried to land there. However, the outer planets also have lots of moons, which would be very suitable places for spacecraft to land.
never
Mars. Viking 1 and Viking 2 both landed on the planets surface in 1976.
it wouldnt be able to breathe and you wold die:)
the speed of a comet and the rotation is far too fast for a spacecraft to land
The outer planets are gas giants, made mostly or entirely of gas, so either there is no surface to land on, or even if there is, it lies underneath such a large amount of atmosphere that the atmospheric pressure would crush any spaceship that tried to land there. However, the outer planets also have lots of moons, which would be very suitable places for spacecraft to land.
never
spacecraft can land on Venus but they melt, it's 400oC,, probes have been sent there but they were destroyed by the heat after a while
Apollo 13 never did land on the moon, as there was a explosion in the spacecraft.
Mars. Viking 1 and Viking 2 both landed on the planets surface in 1976.
The spacecraft uses a lunar module to land on the moon.
a spacecraft is anything from satellites to shuttles.
The Russian vehicle Luna 2 was the first spacecraft to land on the moon.
No Russians never crashed a maned spacecraft on the moon. A unmanned craft i think so.
The space shuttle never landed on the moon, but other NASA spacecraft did.
it wouldnt be able to breathe and you wold die:)
Mars