Astronomers found a massive object orbiting a brown dwarf star. This discovery challenges existing definitions of planets and ...

Mercury, the solar system’s smallest planet and the one closest to the sun, hasn’t received as much love as its celestial ...

Unpopular opinion time, Pluto being reclassified as a dwarf planet was a great thing for our understanding of the solar ...

Astronomers at Lund University in Sweden have found evidence of exocomets—comets in other solar systems—orbiting a young star ...

Fast-changing sodium gas around the 5. 4-million-year-old star PDS 70 provides evidence that icy exocomets may be plunging ...

Wandering planets are not likely to be captured because the planet would have to lose energy to become gravitationally bound.

An unusual planetary system with three known ultra-low density 'super-puff' planets has at least one more planet, according to new observations. An unusual planetary system with three known ultra-low ...

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying long-standing theories of planet formation. The finding hints that some ...

Astronomers using planet-hunting satellites have discovered a rare solar system with six planets moving completely in sync with one another, as if they were untouched by any outside force since being ...

A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, grew up fascinated with the solar system. A self-taught astronomer, he built ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. All of the planets of the solar system are visible together in the ...

CAPE CANAVERAL, Fla. — Astronomers have discovered a rare solar system in the Milky Way that boasts six planets orbiting in perfect rhythm like a cosmic orchestra, untouched by outside forces since ...