Just in time for Halloween, the Hubble Space Telescope spotted a "pumpkin patch" made up of two galaxies just starting to collide, spanning 109,000 light-years across.
Learn more about NASA's New Horizons mission, which performed history's first flyby of the Pluto system on July 14, 2015.
Alan Stern, who leads NASA's New Horizons mission to Pluto and beyond, has been selected to fly aboard SpaceShipTwo, Virgin Galactic's six-passenger suborbital space plane.
Get ready to see the Red Planet up close this week: , offering the closest view of the planet until 2035.
New Horizons' historic flyby of the KBO 2014 MU69, also known as Arrokoth, has revealed incredible insights about the birth of the solar system.
New Horizons' epic Pluto encounter took place five years ago. Celebrate the anniversary with a look at some of the probe's most dramatic and intriguing photos.
NASA's pioneering New Horizons spacecraft has traveled so far that its view of the cosmos is noticeably different than ours.
New Horizons' epic encounter with a small body in the far outer solar system is telling us a lot about how planets are born.
A year after New Horizons buzzed its second target, Arrokoth, a wealth of science has been revealed.
Hopefully you weren't too attached to "2014 MU69," because the most distant object ever explored has a new name.
New Horizons made an epic flyby of a Kuiper Belt object to ring in the New Year — but scientists need brand-new observations to truly understand that data.
A surprisingly gentle merger between two small primordial bodies formed the distant object Ultima Thule, a new study suggests.
Learn about the physical characteristics of Saturn and its famous rings, what we know about Saturn’s moons and Saturn’s roots in Greek mythology.
Beyond Neptune, the Kuiper Belt is a vast region of icy objects called Kupier Belt Objects (KBOs), including dwarf planets Pluto, Eris, Maumea and Makemake — and possibly a true ninth planet.