Scientists are confident Mars was once abundant with water, as seen in massive flood-carved channels, ancient river valleys, and minerals that form only in liquid water. But how the Red Planet ...

The idea of Ceres having water is not entirely new. The dwarf planet was discovered in 1801, then it was just regarded as an asteroid, and since 2005, it has been officially regarded as a dwarf planet ...

The finding is evidence that not all water on the Red Planet was covered in ice, as some Martian climate models suggest. Planetary geologists and astronomers studying Mars have known for decades ...

All planets are made of gas ... Under the intense heat and pressure of newborn planets, water and gas react with each other, creating unexpected mixtures in the atmospheres of young Earth-to ...