Once a realm of imagination and stargazing, the Solar System has now been revealed in stunning clarity through decades of ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show ...

This star, known as HD 110067, may have even more planets. The six found so far are roughly two to three times the size of Earth, but with densities closer to the gas giants in our own solar system.

Hydrogen sulfide outside solar system Talking about the presence of hydrogen sulfide on HD 189733 b, Fu said that this gas is one of the main reservoirs of sulfur within planetary atmospheres.

Scientists first discovered HD 189733b in 2005 and later identified the gas giant as a “hot Jupiter” — a planet that has a similar chemical composition to Jupiter, the biggest planet in our ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, researchers say.

How Did the Solar System Form? The tale of our sun may begin with another star: a predecessor whose fiery death brought about the birth of our solar system.

Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

Scientists have identified an object about 435 miles (700 km) wide inhabiting the frigid outer reaches of our solar system that might qualify as a dwarf planet, spotting it as it travels on a ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

Besides the solar system, HD 144432 appears to provide another example of planets forming in an iron-rich environment. However, the astronomers will not stop there.