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.…

1 month ago

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…

5 months ago

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…

2 years ago

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…

2 years ago

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…

3 years ago

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…

4 years ago

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…

4 years ago

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…

4 years ago

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…

5 years ago

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…

7 years ago