For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, Pluto was officially reclassified as a dwarf planet by the ...

The flares may heat up and inflate the planet's atmosphere, which is dominated by hydrogen and helium. Being lashed by these ...

The long-theorized Planet 9, which astronomers have speculated could be a Neptune-sized planet that has been lurking on the outer edge of the solar system, could explain the unusual clustering and ...

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

A comet has entered the Solar System from interstellar space and will pass through the inner planets later this year, NASA ...

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.

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our Solar System -- only the third ...

An object that appears to be from beyond our Solar System has been spotted hurtling towards the Sun, which if confirmed would ...

Venus is the hottest planet in the solar system due to its thick carbon dioxide atmosphere, trapping heat as part of a runaway greenhouse effect. To stream 13News Now on your phone, you need the ...

WASHINGTON, June 25 (Reuters) - In addition to providing a trove of information about the early universe, the James Webb ...