How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger BradySan Quentin, California ...

Astrophotographer Greg Meyer has captured a colorful view of the famous Trifid and Lagoon nebulas illuminated from within by radiation cast out by generations of energetic young stars.

Clearly, the Andromeda Nebula was a system of stars quite separate from the Milky Way, and in many ways comparable to it. From this simple observation, soon repeated for other starry nebulae, it ...

The Andromeda Galaxy, located 2.5 million light years away, has fascinated observers for centuries. Once believed to be part of the Milky Way, everything changed in 1923 when Edwin Hubble identified ...

A hundred years ago, astronomer Edwin Hubble revealed a universe of galaxies that existed beyond ours. His influence in astronomy continues to this day.

Credit: A Rainbow Mosaic of the Rosette and the Christmas Tree Nebulae © Shaoyu Zhang Behold! The 2025 ZWO Astronomy ...

The Andromeda Galaxy and the Milky Way are the closest neighbors despite that incredible distance. Still, without a doubt, Andromeda is a larger galaxy, possibly twice the diameter of our Milky Way.

Previous research into the impending merger assumed that Andromeda’s transverse motion was small, making the potential for a Milky Way merger much higher. But the newest findings suggest otherwise.

The most prominent of these spirals is the Andromeda nebula which is barely visible without binoculars. Step back in time to 1912, and you’ll find Henrietta Leavitt working at the Harvard ...

The gorgeous Eagle Nebula is one of the most iconic objects in the cosmos, known affectionately as the Pillars of Creation. One of the most famous images ever taken by the Hubble Space Telescope ...

Start exploring the night sky with our top picks for beginner-friendly telescopes. Tested for clarity, ease of use and build quality, these are our favorite models to learn astronomy.

It wasn’t until 1959 when the Soviet Luna 3 probe gave us our first glimpse of the Moon’s far side, and it wasn’t until 2019 when the Chang’e 4 mission made the first soft landing.