There was a lot of it after the Big Bang. But today antimatter is rare. SpaceKids on SPACE.com provides simple, straightforward answers to really big cosmic questions. See more SpaceKids questions.

In a groundbreaking development, scientists have detected antimatter particles bombarding Earth from space, a discovery that promises to unlock new frontiers in physics. The detection was made by ...

The neighbourhood of space where the International Space Station (ISS) resides seems to be littered with unexpected quantities of antimatter – and the culprit may be mysterious dark matter ...

New NASA research has discovered that four moons that orbit the far outer planet — Ariel, Umbriel, Titania and ... habitability,” according to the space agency. “There is evidence from ...

The Alpha Magnetic Spectrometer (AMS), an experiment that will search for antimatter and dark matter in space, leaves CERN August 24 on the next leg of its journey to the International Space Station.

Once launched, AMS-02 will operate as an external module on the International Space Station (ISS). It will look for antimatter and dark matter while measuring cosmic ray composition, in a series ...

Related: Uranus' moons: A guide to the ice giant's strange tilted moons Early in their histories, Uranus' five largest moons — Titania, Oberon, Ariel, Umbriel and Miranda — likely hosted ...

The James Webb Space Telescope has captured amazing new imagery of Uranus along with its rings and moons. The footage shows the moons Titania, Miranda, Ariel, Umbriel and Puck.

Twin brothers from New Jersey will orbit earth together this winter searching for antimatter ... and will be mounted outside the International Space Station to study the universe’s origin ...

The U.S. Air Force took charge Wednesday of a $2 billion antimatter detector destined to catch the last scheduled space shuttle flight in February 2011. Airmen loaded the giant Alpha Magnetic ...