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

What would it take for Jupiter to ignite and become our second sun? What if Jupiter gained just a little bit more mass during ...

Comet C/2025 R3 (PanSTARRS) might be the brightest comet of the year, scientists predict.

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

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 ...

You’ve seen a model of the solar system, with all eight planets (R.I.P. Pluto) revolving around the sun in tidy orbits, but ...

Currently, the Moon is drifting away from Earth at a rate of about 1.6 inches per year making it slowly appear smaller in the ...

What would happen when the Sun releases a burst of energy at the Earth and thousands and thousands of satellites are in the ...

The space rock, known as "2026 AJ" and 40 feet in diameter, is hurtling toward our planet at around 20,500 miles per hour.

When interstellar visitor 3I/ATLAS exhibited some peculiar movements, speculation arose regarding potential alien origins.

New simulations show Mars plays a key role in shaping Earth’s long-term climate by influencing its orbit and axial tilt over hundreds of thousands to millions of years.

Astronomers have captured an exceptionally rare view of young planets in mid-transformation, revealing how bloated, giant worlds may shrink into the most common planets in the galaxy. Astronomers have ...