After Friday's spectacle, a "planet parade" of this size won't appear in the night sky for several years, experts say.

Seven planets will line up for a rare "planetary parade" today (Feb. 28) and you can watch it live online, beginning at 12:00 p.m. ET (1700 GMT).

Whether a galactic environment has the right conditions for habitable planets to form could depend on how the black hole in ...

Protoplanetary disks seen by the ALMA telescope, with an illustration of a protoplanetary disk highlighted in front. | Credit ...

Initially, the planets formed out of a rotating disk of gas and dust around the young ... It exhibited an elongated shape and ...

The planets are still surrounded by rings of gas and dust from which moons appear to be taking shape. The scientists behind ...

Traditional models have suggested that planetesimals -- the tiny building blocks of planets -- formed across wide regions of a young star's disk. But Shibata and Izidoro suggest a different theory ...

and what makes a planet suitable for life. This also guides planetary scientists in their search for other habitable (or inhabited!) worlds in our solar system and beyond! Scientists now think the ...