NASA’s budget is officially in grave danger, but there are things you can do to help.

Proposed NASA cuts would cancel dozens of space missions — including spacecraft already paid for, launched, and making discoveries.

Planets and moons change size all the time, whether by attracting mass, shrinking in volume, or spewing their insides out of volcanoes.

Long-exposure photography can help see dim, distant light sources. It can also show us familiar lights in totally new ways.

Our rovers and astronauts leave tracks where they explore. But there’s always the possibility that those tracks — and even entire missions — could be erased.