For the first time, astronomers have imaged dozens of belts around nearby stars where comets and tiny pebbles within them are ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.

Scientists have been unable to determine whether the dwarf planet’s organics were produced by its own chemical processes or ...

Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Pluto isn't alone—it's part of the Kuiper Belt with possibly hundreds of other planet-sized objects. Because Pluto hasn't ...

There's a new race in space, but it's not where you might think. It's happening close to home – in the nearest bit of space, ...

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

New findings offer clues about the ancient origins of asteroids and their potential role in the formation of terrestrial ...

Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant planets, suggests a new study.

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.

The rare astronomical event will see Mars, Jupiter, Uranus, Venus, Neptune, Mercury and Saturn appear at the same time, ...