Astronomers have discovered the earliest seeds of planets forming around HOPS-315, a baby star located 1,300 light-years away ...

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

CAPE CANAVERAL, Fla. (AP) — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar ...

Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

Ever since the International Astronomical Union recognized Haumea and Makemake as dwarf planets in 2008, University of Maine ...

For decades, astronomers believed our Solar System was a typical model of how planetary systems should form. But recent discoveries are reshaping that view, revealing that our cosmic neighborhood may ...

Sedna, a distant object on the edge of our solar system, offers a rare chance for exploration. Its elongated orbit and ...

Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.

How many moons could there be in total? There are more than 900 known natural satellites in the solar system. However, as we have seen, this number is likely to grow significantly in the future.