Magnetic reconnection can trigger geomagnetic storms that disrupt cell phone service, damage satellites and black out power grids. But how reconnection, in which the magnetic field lines in plasma snap apart and violently reconnect, transforms magnetic energy into explosive particle energy remains a major unsolved problem in plasma astrophysics.
A team of scientists has discovered the first evidence of water ice clouds on an object outside of our own Solar System. Water ice clouds exist on our own gas giant planets - Jupiter, Saturn, Uranus, and Neptune - but have not been seen outside of the planets orbiting our Sun until now.
NASA's Alice ultraviolet spectrograph aboard the European Space Agency's Rosetta comet orbiter has delivered its first scientific discoveries. Rosetta, in orbit around comet 67P/Churyumov-Gerasimenko, is the first spacecraft to study a comet up close.
A long tradition of cosmology research has given birth to a vigorous effort by a new generation of cosmologists to understand the Cosmic Microwave Background (CMB), the thermal radiation left over from the Big Bang.
Approximately every 11 years, the sun undergoes a complete personality change from quiet and calm to violently active. The height of the sun's activity, known as solar maximum, is a time of numerous sunspots, punctuated with profound eruptions that send radiation and solar particles out into the far reaches of space.
Lupus 4, a spider-shaped blob of gas and dust, blots out background stars like a dark cloud on a moonless night in this intriguing new image. Although gloomy for now, dense pockets of material within clouds such as Lupus 4 are where new stars form and where they will later burst into radiant life.
Researchers in Georgia State University's new Astroinformatics program have been awarded $1.5 million from the National Science Foundation to develop software tools that can process large sets of solar astronomy data and allow scientists to perform analyses on scales and detail levels that have not been possible.
Early, fast, turbulent mixing of gas within giant molecular clouds means all stars formed from a single cloud bear the same unique chemical 'tag' or 'DNA fingerprint'. Could such chemical tags help astronomers identify our own Sun's long-lost sibling stars?