Be spherical in shape (Pluto is round due to its gravity). Clear its orbit of other debris (Pluto fails this). Pluto shares its orbit with other objects in the Kuiper Belt and is not ...

Be spherical in shape due to its own gravity. Have “cleared its orbit” of other debris. Pluto meets the first two criteria but failed the third, losing its planetary status bu joining the ...

The triple star system is sending comets, asteroids and meteors our way, and the number of interstellar objects entering the solar system will rise.

NASA scientists have discovered Altjira system, a group of 3 space rocks in Kuiper Belt, providing evidence for the theory of ...

The Oort Cloud begins roughly 2,000 – 5,000 astronomical units (AU) from the Sun, with 1 AU being the average distance between Earth and the Sun.

The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it looks like. Now, new simulations may have given them a first glimpse.

You can see the planetary parade almost every night this week with the best happening on the last day of the month.

The Milky Way's tidal forces may be shaping the Oort Cloud's inner structure into a spiral shape.

When will Pluto lie farthest from the Sun ... happens when a massive star uses up the nuclear fuel in its core. At this point, gravity overwhelms the outward force of radiation.

A hidden structure at the farthest reaches of our solar system is challenging long-held theories. Using advanced simulations, ...

Phone up someone who might know what's really going on - preferably the friend you've heard about - and check out the facts ...