Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...

Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to ...

The hunt for worlds beyond our solar system has shifted from counting planets to confronting extremes that strain basic ...

New research reveals the extent to which Mars is quietly tugging on Earth’s orbit and shaping the cycles that drive long-term ...

Missions and Discoveries. Artemis II Mission: Astronauts to Orbit the Moon. Get ready, space fans! NASA’s Artemis II mission ...

In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to ...

Astronomers have observed a white dwarf – a highly compact Earth-sized stellar ember – that is creating a colorful shockwave ...

Discovered by volunteer scientists, this alien planet is out of synch with its siblings ...

With launch potentially just three weeks away, the agency is working tirelessly to get the SLS rocket, Orion spacecraft, and ...