A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

The search for life beyond Earth is a key driver of modern astronomy and planetary science. The U.S. is building multiple major telescopes and planetary probes to advance this search. However, the ...

San Diego — A team of planet-hunting astronomers announced today (Jan. 9) the discovery of two multi-planet systems that are among the most bizarre planetary systems found to date. One system calls ...

Have you ever wondered just how big space really is? It’s huge. In fact, it’s astronomical! The Colorado Scale Model Solar System depicts the Sun, the planets, and the distances between them all on ...

About 4. 6 billion years ago, the Solar System formed from a cloud of dust and gas collapsing in on itself due to gravity.

The Vega planetary system hosts the archetype of extrasolar Kuiper belts, and is rich in dust from the sub-au region out to 100’s of au, suggesting intense dynamical activity. We present ALMA mm ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the distance ...

New research suggests that planets outside our solar system contain far less surface water than scientists once believed.