A dramatic magnetic power struggle at the Sun's surface lies at the heart of solar eruptions, new research using NASA data shows.
Astronomers have used NASA's Hubble Space Telescope to make the most precise measurements of the expansion rate of the universe since it was first calculated nearly a century ago. Intriguingly, the results are forcing astronomers to consider that they may be seeing evidence of something unexpected at work in the universe.
An amateur astronomer testing his new camera captures the moment a supernova became visible in the night sky, which has helped an international team of researchers to test their theory about the beginning stages of a stellar explosion.
A team of astronomers led by Devin Chu, a UCLA scientist from Hawaii, has found that S0-2 does not have a significant other after all, or at least one that is massive enough to get in the way of critical measurements that astronomers need to test Einstein's Theory of General Relativity. Up until now, it was thought that S0-2 may be a binary, a system where two stars circle around each other.
An amateur astronomer in Argentina captured images of a distant galaxy before and after the supernova's 'shock breakout' - when a supersonic pressure wave from the exploding core of the star hits and heats gas at the star's surface to a very high temperature, causing it to emit light and rapidly brighten. Victor Buso's chances of such a discovery, his first supernova, is estimated at one in 10 million or perhaps even as low as one in 100 million.
Astronomers reveal a new high resolution map of the magnetic field lines in gas and dust swirling around the supermassive black hole at the centre of our Galaxy, published in a new paper in Monthly Notices of the Royal Astronomical Society. The team, led by Professor Pat Roche of the University of Oxford, created the map, which is the first of its kind, using the CanariCam infrared camera attached to the Gran Telescopio Canarias sited on the island of La Palma.
First light from a supernova is hard to capture; no one can predict where and when a star will explode. An Argentinian amateur astronomer has now captured on film this first light, emitted when the exploding core hits the star's outer layers: shock breakout. Subsequent observations by UC Berkeley astronomers using the Lick and Keck observatories helped identify it as a Type IIb supernova that slimmed down from 20 to 5 solar masses before exploding.
The precise mechanism driving pulsating auroras, long unknown, has now been identified with help from NASA's THEMIS mission.
An international team of astronomers, including researchers from the University of Pennsylvania, has confirmed the discovery of the most distant supernova ever detected, a huge cosmic explosion that took place 10.5 billion years ago when the universe was only a quarter of its current age.
If they existed, axions -- one of the candidates for particles of the mysterious dark matter -- could interact with the matter forming our world, but they would have to do this to a much, much weaker extent than it has seemed up to now. New, rigorous constraints on the properties of axions have been imposed by an international team of scientists responsible for the nEDM experiment.