Hubble captures colliding galaxies
Stars Flare Into Life Around A Massive Black Hole
Omega Centauri is one of the biggest star clusters orbiting our own galaxy, with the light of millions of stars blazing from it ― including some visible with the naked eye. But those stars aren't all the same age, as this new image from the Spitzer Space Telescope shows. Combining visible and infrared images, this new composite shows a mixture of ancient stars (which are red) and younger stars, like our own sun (which are blue). And click through for new evidence that all those stars may be circling a massive black hole at Omega Centauri's core.
A Galaxy Unwinds, 140,000 Light Years From Its Core
Baby stars spring to life at the supposedly desolate fringes of the Southern Pinwheel Galaxy, also known as M83, in this new image from NASA's Galaxy Evolution Explorer. Up to 140,000 light years from the galaxy's center, the outer arms of its "pinwheel" shape seem to flap away from the center like "giant red streamers," and these extended galaxy arms are giving birth to a surprising number of new stars. Want to see another image of the pinwheel galaxy extending itself?
Monster black hole found escaping home galaxy
A mammoth black hole has been discovered fleeing its host galaxy at high speed, according to a controversial new study. The galactic eviction may be the result of a violent merger between two black holes.
Mirrors on the Moon could catch alien eyes
Mounting mirrors on the Moon and using them to signal across space could let ET know we Earthlings are here.
Ever since radio broadcasts began we've been trumpeting our presence to nearby parts of the galaxy, so far without reply. To improve the chances of being found, Shawn Domagal-Goldman and Jacob Haqq-Misra of Pennsylvania State University in State College reckon we should cover half of the Moon with mirrors.
Is there a hidden order to the Northern Lights?
The shifting, shimmering Northern Lights might be more ordered than anyone realised. New observations suggest that, contrary to expectations, some of the colourful light shows appear to be polarised, with their electromagnetic waves lined up in a common orientation.
Cosmic time warp revealed in slow-motion supernovae
Once upon a time, time was different. Supernova explosions in the early universe appear to age more slowly than today's supernovae, as if time itself was running slower back then, according to a recent series of astronomical observations. This cosmic time warp is exactly what should be produced by the expansion of the universe, confirming conventional big bang theory.