It stands as one of the five officially recognized dwarf planets in our solar system, alongside Pluto, Haumea, Makemake, and ...

That’s because Pluto was downgraded from a “planet ... our Solar System. The same year that Pluto was ignominiously stripped of its status, a paper was published theorizing that there was ...

Computer simulations suggest that there is an undiscovered Earth-like planet lurking in ... new TNOs could revolutionize our theories about how the solar system formed,” said Lykawka.

Unless you’re really on the low end of our listener ... proponent of Planet Nine, you know, the person who’s most convinced that there is a new planet in the solar system, is also responsible ...

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the four outer planets, a new study suggests.

One possibility is that a rogue planet ... planet could be hiding in our solar system Dwarf planet near Earth has 90% water ...

There are eight official planets (sorry, Pluto) in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. But astronomers have spent the better part of a century ...

With a radius of 2,106 miles, Mars is the seventh largest planet in our solar system ... different from one another, to a degree unlike any other planet in the solar system. The planet’s ...