The formation of Mercury remains an unsolved mystery. The planet closest to the sun has a disproportionately large metallic ...

New research shows hidden Venus asteroids could unleash city-sized impacts. Learn why they’re so hard to spot and how telescopes might find them.

The main working hypothesis for the Mercury problem says that the planet is the victim of a collision with a different-sized object. The cataclysmic collision stripped much of the planet's mantle and ...

In a cosmic milestone that once seemed straight out of science fiction, astronomers have captured something previously only ...

Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and astronauts.

Astronomers have found yet another quasi-moon companion of Earth in its orbit around the Sun believed to be a chunk of our ...

The formation of Mercury remains an unsolved mystery. The planet closest to the Sun has a disproportionately large metallic core – accounting for ...

A large cloud of tiny fragments revolves around Earth following satellite explosions, rocket stage malfunctions, and ...

With current rocket propulsion technology, it would take tens or hundreds of millennia to reach our neighboring star system, ...

So the bottom line is that the gravity of the closer tidal bulge on the Earth is pulling the Moon forward, which increases ...

The European Space Agency’s Plato spacecraft has safely arrived at ESTEC, ESA’s technical heart in the Netherlands. There, ...

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 ...