Astronomer Charles Steinhardt said most stars we see "might have formed under different conditions than we previously believed." ...

This event, known as an occultation (derived from the Latin word occultāre, which means "to conceal", can be a startling spectacle, especially if it involves a bright star. But unlike a planet ...

Traditionally, astronomers have grouped galaxies into two different categories: blue, which are young and actively forming stars, and red, which are older and have ceased star formation.

The Hubble Space Telescope has discovered a rare "blue lurker" star that has been feeding on material from its two conjoined siblings. The fast-spinning star provides a detailed look at the ...