Six planets are parading across the sky, appearing as some of the night's brightest stars. A few easy tips can help you ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

One of the most notable baby stars in the galaxy, T Tauri, could be about to vanish from sight for decades as a thick, ...

According to astronomy, when you wish upon a star you’re a million years too late. The star is dead, just like your dreams. When you wish upon a star, Jiminy Cricket told us, your dreams come true.

Astronomers have completed a stunning massive photomosaic of our closest celestial neighbor, the Andromeda galaxy, comprised ...

Winter skies can be the clearest of the year and the richest in stars. Here are some of the constellations and planets to ...

Prior to that 1915 discovery, scientists believed that all the stars in the night sky belonged to a single galaxy, and they had no concept of the scale of the wider universe. But in the century ...

After a close look with a powerful radio telescope, astronomers are still puzzled by a pair of objects with strange ...

A massive white dwarf and a sun-like "blue lurker" star tell a remarkable story of what was once a triple-star system in the ...