Billions of years ago, liquid water flowed on the surface of Mars. However, there are a lot of unknowns in the scientific understanding of ancient water on Mars, including where on Red Planet the wat… [+3647 chars]
<ul><li>Scientists worry astronauts will not be able to adjust to Martian gravity. </li><li>Travelling months with microgravity can affect body seriously.</li><li>Microgravity causes muscle and bone … [+2567 chars]
With NASA's Artemis 1 mission launching to the moon this month, Space.com is taking a look at what we know about the moon and why we care. Join us for our Moon Week special report in the countdown to… [+9212 chars]
This throwback picture is the first picture of our home planet Earth taken from the vicinity of the Moon. The photo was captured by NASA's Lunar Orbiter I, the first U.S. spacecraft to orbit the Moon… [+1574 chars]
All stars dies and our Sun is a star. Therefore, it makes sense that at some point down the line, our Sun, which provides life to Earth, will die, too. When it does, scientists say that the Sun will … [+2250 chars]
