During the Solar System’s first million years, its earliest outer worlds appear to have formed from a carefully filtered mix ...

Harvard University researchers recently examined carbonaceous chondrite meteorites using precise measurements of three ...

Voyager crossed the heliopause, but that does not mean it has left the Solar System completely. The Oort Cloud, solar gravity, fading power, and the difference between interstellar space and the Sun’s ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space telescopes and orbiters have been documenting the rare visit. A mysterious ...

The Hubble Space Telescope's best images of the planets and other celestial bodies of our Solar System ...

For more than half a century, rockets have been humanity’s ticket to space. They carried astronauts to the Moon, launched probes to the outer planets, and continue to power missions toward Mars. But ...