A very rare treat is about to grace Earth's night skies.

A rare planetary parade where all seven planets temporarily line up on the same side of the Sun is happening on February 28, ...

As the night progresses, more planets will fade. Mars will be the last planet visible. We have two illustrations to help visualize the planetary alignment: 1. An annotated night sky map showing the ...

As the rover moved, it used a process known as ground penetrating radar (GPR) to map up to about 260 feet ... landing site in the distant past on Mars (left) and how long-term physical and chemical ...

The planet was once more hospitable ... to complement further studies that can lead to subsurface water maps of Mars.