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 ...

Does our Solar System have 9 planets or only 8? Astronomers have gone back and forth on that a lot, with Pluto now being classified as a dwarf planet. However, out beyond Neptune there could be ...

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. Close. Advertisement.

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

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 Sun and planets of our solar system all formed from the same cloud of gas and dust, but the planets’ compositions vary with mass and distance from our star.

The James Webb Space Telescope has observed two large planets at different stages of infancy - one with an atmosphere brimming with dusty clouds and the other encircled by a disk of material - ...

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 ...

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

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

CAPE CANAVERAL, Fla. — Astronomers are monitoring an object headed our way that may have wandered over from another star ...

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