The newly discovered comet, C/2025 F2 (SWAN), is racing toward the Sun, and it may not survive its closest approach.

A new comet has been discovered. Now getting closer to the sun and expected to brighten over the next few weeks, comet C/2025 ...

(Deep-sky simply means "beyond the solar system ... in what was then called the Andromeda Nebula, the incredibly dim magnitude of the star could be used to calculate its great distance.

Using variable stars as distance markers and the giant telescope on Mount Wilson, Edwin Hubble (then a young and little-known astronomer) was able to show that the Andromeda Nebula was over a ...

Stargazers will be treated to overlapping meteor showers in April. From April 20 to April 26, both the Lyrids and Eta ...

Photo: Andromeda nebula plate with Hubble's handwritten circle around the variable star he discovered In 1919 American astronomer Edwin Hubble began work at the Mount Wilson Observatory in ...

A century ago, Edwin Hubble revolutionized our understanding of the universe by proving that the Milky Way is just one of ...

The embedded variable stars proved that the Andromeda nebula was much farther away than ... finding And Andromeda wasn’t alone. The night sky was peppered with hundreds of spiral and irregular ...