Category Astronomy/Space

University of Arizona astronomers have identified five examples of a new class of stellar system. They’re not quite galaxies and only exist in isolation.

The new stellar systems contain only young, blue stars, which are distributed in an irregular pattern and seem to exist in surprising isolation from any potential parent galaxy.

The stellar systems – which astronomers say appear through a telescope as “blue blobs” and are about the size of tiny dwarf galaxies – are located within the relatively nearby Virgo galaxy cluster...

A University of Arizona-led team of astronomers has created a detailed, 3D image of a dying hypergiant star. The team, led by UArizona researchers Ambesh Singh and Lucy Ziurys, traced the distribution, directions and velocities of a variety of molecules surrounding a red hypergiant star known as VY Canis Majoris.

Their findings, which they presented on June 13 at the 240th Meeting of the American Astronomical Society in Pasadena, California, offer insights, at an unprecedented scale, into the processes that accompany the death ...

White dwarf sheds light on the systemic chaos that occurs when a star dies. The violent death throes of a nearby star so thoroughly disrupted its planetary system that the dead star left behind — known as a white dwarf — is sucking in debris from both the system’s inner and outer reaches, UCLA astronomers and colleagues report today.

This is the first case of cosmic cannibalism in which astronomers have observed a white dwarf consuming both rocky-metallic material, likely from a nearby asteroid, and icy material, presumed to be from a body similar to those found in the Kuiper belt at the fringe of our own solar system.

“We have neve...