An image of the nearby Pleiades star cluster. CfA astronomer Guillermo Torres has completed a detailed eleven-year study of intermediate mass stars in this cluster using SAO’s Fred L. Whipple Observatory Tillinghast facility. Because these stars are rapidly rotating, previous spectroscopic measurements of their motions and properties had been unreliable. […]

An artistic rendering of generic stellar streams in the Milky Way. Credit: NASA/JPL-Caltech/R. Hurt, SSC & Caltech Examination of Theia 456 finds its nearly 500 stars were born at same time. The Milky Way houses 8,292 recently discovered stellar streams — all named Theia. But Theia 456 is special. A stellar stream […]

A simulated collision between two gas-rich galaxies. Part of the gas is ejected in large tails and as the galaxies get closer they merge to form a single system. Credit: Jeremy Fensch et al.   ANIMATION Astronomers have looked nine billion years into the past to find evidence that galaxy mergers […]

The XMM-Newton X-ray telescope reveals a new type of star in X-ray light. Credit: ESA/XMM-Newton, L. Oskinova/University Potsdam, Germany This image shows a new type of star that has never been seen before in X-ray light. This strange star formed after two white dwarfs – remnants of stars like our […]

Artist’s conception of a brown dwarf. Credits: NASA/ESA/JPL Planetary scientists wondered if bands of winds or swirling storms dominated the atmospheres of brown dwarfs. University of Arizona-led research has solved the mystery. A University of Arizona-led research team has found bands and stripes on the brown dwarf closest to Earth, […]

Artist’s depiction of a magnetar. Credit: ESO/L. Calçada Astronomers have recently found the fastest spinning and possibly the youngest magnetar known. This object, known as J1818.0-1607, is located about 21,000 light years away in the Milky Way galaxy. Magnetars are a special class of neutron stars that possess extremely powerful magnetic fields. […]

591 high velocity stars’ positions and orbits. Credit: Kong Xiao of NAOC A research team, led by astronomers from National Astronomical Observatories of Chinese Academy of Sciences (NAOC), has discovered 591 high velocity stars from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) and Gaia, and 43 of them […]

Star formation. Credit: University of Zurich How stars form in galaxies remains a major open question. Robert Feldmann sheds new light on this topic with the help of a data-driven re-analysis of observational measurements. Stars are born in dense clouds of molecular hydrogen gas that permeates interstellar space of most […]

Artist’s composition of the two brown dwarfs, in the foreground Oph 98B in purple, in the background Oph 98A in red. Oph 98A is the more massive and therefore more luminous and hotter of the two. The two objects are surrounded by the molecular cloud in which they were formed. […]

Images of the sun captured by the IRIS mission show new details of how low-lying loops of plasma are energized and may also reveal how the hot corona is created. Credit: Rice University/NASA   ENLARGE Orbiting Instrument Offers Scientists the Lowdown on Sun’s Super-Hot Atmosphere A phenomenon first detected in the […]