The early galaxies of the universe were very different from today’s galaxies. Using new detailed studies carried out wit…

Scientists have observed in unprecedented detail the birth of a massive star within a dark cloud core about 10,000 light years from Earth.

The team used the new ALMA (Atacama Large Millimetre/submillimetre Array) telescope in Chile – the most powerful radio t…

The Sun's outer atmosphere, or corona, has posed an enduring mystery. Why is it so hot? The Sun's visible surface is onl…

Chondrules may have formed from high-pressure collisions in early solar system

A normally staid University of Chicago scientist has stunned many of his colleagues with his radical solution to a 135-y…

Mysterious bursts of radio waves originating from billions of light years away have left the scientists who detected them speculating about their origins.

The international research team, writing in the journal Science, rule out terrestrial sources for the four fast radio bu…

An international group of astronomers that includes UC Santa Barbara astrophysicist Crystal Martin and former UCSB postd…

Let’s all fist bump: Spiral galaxies like our own Milky Way appear to be much larger and more massive than previously be…

In line with NASA's recently issued "Asteroid Grand Challenge," the UA is at the forefront of discovering and tracking s…

All stars begin their lives in groups. Most stars, including our Sun, are born in small, benign groups that quickly fall…

A study led by the University of Alicante, in which the National Research Council has participated, has detected what ma…

An international team of astronomers has found that a nearby star previously thought to host two or three planets is in…

From the “Backyard Supernova,” the Berkeley Lab-led Nearby Supernova Factory has built a benchmark atlas for normal Type Ia’s

Type Ia supernovae are indispensable milestones for measuring the expansion of the universe. With definitive measures of…

New observations of a nearby active galaxy called NGC 3783 have given a team of astronomers –– including a UC Santa Barb…

On June 7, 2011, our Sun erupted, blasting tons of hot plasma into space. Some of that plasma splashed back down onto th…

UCLA space scientists have determined what caused the mysterious ring to appear in the Van Allen radiation belts in Sept…

Astrophysicists have found that contrary to decades of orthodoxy, stars with a high sodium content die before reaching t…

Segue 2 has a mere 1,000 stars bound by dark matter but could answer a major riddle

The least massive galaxy in the known universe has been measured by UC Irvine scientists, clocking in at just 1,000 or s…

Chunks of frozen carbon dioxide have been identified as the most likely mechanism carving linear gullies into sand dunes on Mars, according to a new study combining images from the UA-operated HiRISE camera and experiments conducted on dunes here on Earth.

Chunks of frozen carbon dioxide have been identified as the most likely mechanism carving linear gullies into sand dunes…

If you had a time machine that could take you anywhere in the past, what time would you choose? Most people would probab…

Most skygazers recognize the Orion Nebula, one of the closest stellar nurseries to Earth. Although it makes for great vi…