Trans-Neptunian Object (TNO)
A Stellar Flyby Jumbled Up the Outer Solar System
An ancient passerby may have visited the Sun and inadvertently helped shape the Solar System into what it is today.…
New Evidence for Our Solar System’s Ghost: Planet Nine
Does another undetected planet languish in our Solar System's distant reaches? Does it follow a distant orbit around the Sun…
If Planet 9 has Moons, Would That Help Us Find It?
Planet 9 continues to remain elusive. This potential super-Earth-sized object in the outer Solar System is only hypothetical, as something…
Dwarf Planet Quaoar has a Ring
Quaoar is one of about 3,000 dwarf planets in our Solar System's Kuiper Belt. Astronomers discovered it in 2002. It's…
Two Bizarre red Asteroids Somehow Migrated From the Kuiper Belt all the way to the Main Asteroid Belt
If asked to pick what color asteroids in the asteroid belt would be, red is likely not one that would…
Astronomers Find a New Binary Object in the Kuiper Belt
Scientists from the Southwest Research Institute (SwRI) have presented the discovery of a binary pair of objects way out in…
Uranus’ Moons are Surprisingly Similar to Dwarf Planets in the Kuiper Belt
Astronomer William Herschel discovered Uranus—and two of its moons—230 years ago. Now a group of astronomers working with data from…
If Planet 9 is a Primordial Black Hole, We Might Be Able to See Flares When it Consumes Comets
A comet-eating black hole the size of a planet? It's possible. And if there's one out there in the distant…
Over a Hundred New Large Objects Found in the Kuiper Belt
Hey Pluto, Sedna, Haumea, Makemake Et al.: You’ve got company! While searching for distant galaxies and supernovae, the Dark Energy…
Evidence Mounts for the Existence of Planet Nine
The latest study that looks into the possible existence of Planet 9 offers a new technique, one which is free…