The Reasons We May Soon Find Planet Nine

Since 2016, astronomers have been searching for a ninth planet some researchers believe may be hiding at the edge of our family of planets. The orbits of some trans-Neptunian objects, or TNO’s, suggest that another planet is waiting out there to be discovered. Astronomers at the University of Michigan recently released a study suggesting that such a world will likely be found, or ruled out, in the next 10 to 15 years, as new observatories come online. Pluto was once considered to be the ninth planet, by was re-designated as a dwarf planet in 2006.

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Hubble Reveals Origins of Hippocamp — The Tiny Moon of Neptune that Shouldn’t Be There

Hippocamp is one of the smallest, and darkest, moons of Neptune. Known to astronomers as “The Moon that Shouldn’t be There,” it orbits the giant planet at a distance so close to the larger moon of Proteus that it should have already been destroyed. Researchers using the Hubble Space Telescope have now concluded that this tiny satellite, just 20 miles in diameter, broke off of its larger neighbor billions of years ago, following an impact with a comet. When Voyager 2 visited Neptune in 1989, it photographed a massive impact crater on Proteus, which is likely evidence of this ancient collision.

Read More Hubble Reveals Origins of Hippocamp — The Tiny Moon of Neptune that Shouldn’t Be There