Since Pluto remains in the sun’s orbit, it should be considered a planet due to the fact that it is still a part of the solar system. And since Pluto is still hanging on at the end of the system, it ...

February 18 holds a special place in history. Martin Luther's death in 1546 sparked the Protestant Reformation. Mark Twain's ...

Some of the planets in our Solar System are gigantic. But what if they got even bigger? Let’s go up the planetary size chart and see what kind of chaos doubling the size of every planet would make.

The year of the Fire Horse and the New Moon in Aquarius are happening on the same day – so expect transformation, and lots of ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

The curious minds at What If imagine Earth shrinking to the size of Pluto, exploring how gravity, atmosphere, and life would ...

Discover the Kuiper Belt: a frozen ring of dwarf planets and trillions of icy bodies, currently being explored by NASA's New ...

Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison with Pluto.

A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, ...

Discovered on June 4, 2002, Quaoar is a trans-Neptunian object about 1,100 km (690 miles) in diameter. Like the dwarf planet Pluto, this object dwells in the Kuiper Belt, an icy debris field of ...