NASA is planning a manned mission to Mars on the Orion spacecraft by 2030. This is an image of Mars' landscape taken by Mars Pathfinder in 2007.
For the first Martian explorers, what will living on Mars be like? Answer this question by deciding which of the following descriptions of Mars is true.
Description W: Very warm space suits will be needed because the temperature never rises above -60C
Description X: There are many active volcanoes, some of which are larger than those found on Earth
Description Y: A day on Mars will about as long as a day on Earth
Description Z: A large moon, Io, will shine brightly during Martian nights