An MIT study finds black holes and neutron stars are key to measuring our expanding universe.
Using the power and synergy of two space telescopes, astronomers have made the most precise measurement to date of the universe's expansion rate.
The first-ever identification of a deep-space source of the super-energetic subatomic high-energy neutrino particles has launched a new era of space research. Detection of one such neutrino beneath the Antarctic ice sent a global team of astronomers racing to track down its origins: a flaring supermassive black hole 3.7 billion light years from Earth. A report will be published in the journal Science by the IceCube team and collaborators, including multiple Penn State University coauthors.
Observations made by researchers using a National Science Foundation (NSF) detector at the South Pole and verified by ground- and space-based telescopes have produced the first evidence of one source of high-energy cosmic neutrinos.
An international team of astronomers has discovered an ancient and dramatic head-on collision between the Milky Way and a smaller object, dubbed the 'Sausage' galaxy. The cosmic crash was a defining event in the early history of the Milky Way and reshaped the structure of our galaxy, fashioning both its inner bulge and its outer halo, the astronomers report in a series of new papers.
NASA's NuSTAR space telescope shows that Eta Carinae, the most luminous and massive stellar system within 10,000 light-years, is accelerating cosmic rays.
Scientists have found that molecular oxygen around comet 67P is not produced on its surface, as some suggested, but may be from its body.
Uranus was hit by a massive object roughly twice the size of Earth that caused the planet to tilt and could explain its freezing temperatures, according to new research.
A research team led by astronomers at the University of Warwick had to wait over 100 days for the sight of the first of confirmed neutron star merger to reemerge from behind the glare of the sun.
Based on a new study of how near-Earth asteroid Phaethon reflects light at different angles, astronomers think that its surface may reflect less light than previously thought. This is an exciting mystery for the recently approved DESTINY+ mission to investigate when it flies past Phaethon.