The good news? There's a brand new dwarf planet where we can launch the ultimate do-over! TG387 only completes one trip around the Sun every 40,000 years, and at the furthest point of its journey it swings out to a distance of 2,300 Astronomical Units (AU).
The discovery of 2012 VP113 led Sheppard and Trujillo to notice similarities of the orbits of several extremely distant solar system objects, and they proposed the presence of an unknown planet several times larger than Earth - sometimes called Planet X or Planet 9 - orbiting the Sun well beyond Pluto at hundreds of AUs.
First observed in October 2015, it took four years of examination to finally determine 2015 TG387's orbit-so slow and long that for about 99 percent of its 40,000-year trajectory, the sphere is too faint to see.
The two other newly discovered dwarf planets are 90377 Sedna, found in 2003, which is about 620 miles across, and 2012 VP113, discovered in 2012, which is about 310 miles. But if Pluto isn't Planet Nine, the hope is that The Goblin can help scientists discover what is. "They can be used as probes to understand what is happening at the edge of our Solar System".
For now, the discovery of 2015 TG387 is simply fantastic in itself, as we search the night sky for the edge of our solar system and the wonderful object which lie out in the deep dark cold of the solar system!
Scott Sheppard of the Carnegie Institution for Science, one of the astronomers who made the discovery, said the Goblin is small for a dwarf planet. There are probably many more of these objects out there, but they're hard to detect due to their distance. This suggests that there still is a massive super-Earth far far away from the Sun.
The researchers believe that a hypothetical object dubbed Planet X might exist on the edges of the Solar System, helping to shepherd objects lying beyond Neptune.
"These so-called Inner Oort Cloud objects like 2015 TG387, 2012 VP113, and Sedna are isolated from most of the solar system's known mass, which makes them immensely interesting", Sheppard explained. But if they're not being tugged on by the planets we know about, that leaves the door open for interactions with objects we haven't yet discovered, like Planet Nine.
An artist's conception of distant Planet X, which could be shaping the orbits of smaller extremely distant objects.
"We think there could be thousands of small bodies like 2015 TG387 out on the Solar System's fringes, but their distance makes finding them very hard", said David Tholen from University of Hawaii.