A Japanese spacecraft is expected to reach Martian orbit in 2025 to collect material from the surface of the moon Phobos before returning to Earth by 2029.

Scientists analyzing isotope ratios have found that many of the elements that make up life could be left over from Earth’s formation.

Sound needs matter to propagate, so the vast vacuum of space is not just empty − it’s silent.

A newly discovered planet that should be too big to have formed around a tiny star is throwing into question what researchers know about planet formation.

Scientists have discovered that, even in "pristine" solar systems, planets exhibit a bit of a tilt.

Five of the Uranus moons might be ocean worlds − and if there’s water, there might be life.

Borman’s professionalism helped the risky Apollo 8 mission become a success.

Some dark craters on the Moon are never exposed to light − ice could be hiding in these permanently shadowed regions, and India’s Chandrayaan-3 mission marked a big step toward finding it.

The universe is expanding faster than physicists would expect. To figure out what processes underlie this fast expansion rate, some researchers are first trying to rule out what processes can’t.

How did the molecular building blocks for life end up on Earth? One long-standing theory is that they could have been delivered by comets. Now, researchers