How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

The planets in order from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. If you include the ...

The Sun, our life-giving star, is slowly dying. In about 5 billion years, it will exhaust its fuel and transform into a red giant, altering the solar system forever. But long before that, the Sun’s ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

This research could help us pinpoint which planets outside our solar system, known as exoplanets, might be able to support life. It also sheds new light on the short-term weather patterns we ...

Scientists are tracking a large gas planet experiencing quite a quandary as it orbits extremely close to a young star - a ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Comet or asteroid heading for the Sun is only the third time an interstellar object has been spotted inside our group of ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

The solar wind pushes some of the gas and dust away from the comet, forming those beautiful tails we see. A comet actually ...