At half the size of Earth and one-tenth its mass, Mars is a featherweight as far as planets go. Yet new research reveals the ...

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 ...

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

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 ...

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

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

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

NASA’s Gateway is coming to life with a solar-powered spacecraft built to light it up—and move it around the Moon.

A new NASA spacecraft called Pandora is awaiting launch ahead of its journey to study the atmospheres of exoplanets, or ...

The most striking claim about 3I/ATLAS is its estimated age range of 8-14 billion years. This analysis, led by Michele ...

If scientists are able to inspect it in person, and they find that Mars was indeed once alive with microbes, we would know ...