Galaxy

Galaxy

Relating to any large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space.

Industry: Astronomy

Add a new term

Contributors in Galaxy

Become a Contributors

Galaxy

black hole

Astronomy; Galaxy

A black hole is the circular dark space that sits at the center of a galaxy which absorbs everything including light so nothing can be reflected or escaped from it. Around a black hole there is a ...

galaxy

Astronomy; Galaxy

A galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas dust, and an important but poorly understood component tentatively ...

The giant intergalactic bubble of gas floating in space. It's the remnant of a massive star explosion, or supernova, in the Large Magellanic Cloud (LMC) galaxy some 400 years ago. The colorful image ...

active sun

Astronomy; Galaxy

The Sun during its 11-year cycle of activity when spots, flares, prominences, and variations in radiofrequency radiation are at a maximum.

Milky Way bubbles

Astronomy; Galaxy

The two giant bubbles of high-energy gamma rays protruding from the Milky Way, each spanning 25,000 light-years across, roughly the size of the galaxy itself. According to NASA, the bubbles are ...

Hubble

Astronomy; Galaxy

American astronomer who showed that there are galaxies beyond our own and that they are constantly moving outwards from ours.

Quasar

Astronomy; Galaxy

A very bright, star like object that is extremely far away from the Earth. A quasar produces several thousand times as much energy as the entire Milky Way galaxy.