Galaxy clusters contain a few to thousands of galaxies and are the largest bound structures in the Universe. Most galaxies are members of a cluster. Our Milky Way, for example, is a mem...

Near Earth Objects (NEOs) are small solar system bodies whose orbits sometimes bring them close to the Earth, thereby posing a potential threat. Because NEOs are constantly being repleni...

Alex Dalgarno was a truly exceptional person and scientist. World renowned, he was widely considered the father of theoretical atomic and molecular astrophysics, a field that continues to...

Cambridge, MA - A snapshot of the stellar life cycle has been captured in a new portrait from NASA's Chandra X-ray Observatory and the Smithsonian's Submillimeter Array (SMA). A cloud ...

The first stars appeared about one hundred million years after the big bang, and ever since then stars and star formation processes have lit up the cosmos. When the universe was about th...

Pasadena - CA The Giant Magellan Telescope Organization (GMTO) today announced the appointment of Walter E. Massey, PhD, and Taft Armandroff, PhD, to the positions of Board Chair and V...

Cold gas in the form of neutral hydrogen atoms provides the reservoir for star formation in galaxies from the distant to the nearby Universe. Understanding how it accretes onto galaxies ...

Astronomers have found a pair of extraordinary cosmic objects that dramatically burst in X-rays. This discovery, obtained with NASA's Chandra X-ray Observatory and ESA's XMM-Newton observ...

Neutron stars are the detritus of supernova explosions, with masses between one and several suns and diameters only tens of kilometers across. A pulsar is a spinning neutron star with a ...

Extreme variability in the intensity of the optical light of galaxies, by factors of two or more, is of great interest to astronomers. It can flag the presence of rare types of supernova...