Planet Nine

Astronomers discover alien world hotter than most stars

Astronomers discover alien world hotter than most stars

Imagine a planet like Jupiter zipping around its host star every day and a half, superheated to temperatures hotter than most stars and sporting...
Four candidates for Planet 9 located

Four candidates for Planet 9 located

A concentrated three-day search for a mysterious, unseen planet in the far reaches of our own solar system has yielded four possible candidates. The search...
Astronomers looking for citizen scientists to help find Planet 9

Astronomers looking for citizen scientists to help find Planet 9

Elusive planets and dim failed stars may be lurking around the edges of our solar system, and astronomers from NASA and UC Berkeley want...
Backyard Worlds: Planet 9 lets public search for new nearby worlds

Backyard Worlds: Planet 9 lets public search for new nearby worlds

NASA is inviting the public to help search for possible undiscovered worlds in the outer reaches of our solar system and in neighboring interstellar...
extraterrestrial observers

What if extraterrestrial observers called, but nobody heard?

As scientists step up their search for other life in the universe, two astrophysicists are proposing a way to make sure we don't miss...
New Evidence on the Formation of the Solar System

New evidence on the formation of the solar system

International research involving a Monash University scientist is using new computer models and evidence from meteorites to show that a low-mass supernova triggered the...
Simulated structure of planet 9

How big and how bright is Planet 9 if it really exists?

How big and how bright is Planet 9 if it really exists? What is its temperature and which telescope could find it? These were the...
Planet Nine: A world that shouldn't exist

Planet Nine: A world that shouldn’t exist

Earlier this year scientists presented evidence for Planet Nine, a Neptune-mass planet in an elliptical orbit 10 times farther from our Sun than Pluto. Since...
planet nine

More evidence for Planet Nine on solar system’s fringes

As the search for a hypothetical, unseen planet far beyond Neptune's orbit continues, research by a University of Arizona team provides additional support for...
Planet Nine

Nine things to know about Planet Nine

In January, Konstantin Batygin, assistant professor of plantary science, and Mike Brown, the Richard and Barbara Rosenberg Professor of Planetary Astronomy, announced that they...