In the 1920s, astronomers thought that the Milky Way was the entire universe. Hubble's discovery revealed a much bigger ...

if we were able to get above the Milky Way, it would look like an enormous spiral about 100,000 light years across. The centre of the galaxy is a dense and chaotic place, with stars and gas hurtli ...

It is a spiral galaxy like our own, the Milky Way. Zhúlóng also shows a clear division between its central concentration of stars, known as the bulge, and the disk where the spiral arms are located.

Somewhere in between, humans realized the universe is much larger than our Milky Way — that the spiral nebulas visible ... universe beyond the Milky Way galaxy, but his work really stood on ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

A century ago, Edwin Hubble first established that this so-called 'spiral nebula' was actually very far outside our own Milky Way galaxy -- at a distance of approximately 2.5 million light-years ...

Also called M31—and our closest giant neighboring galaxy at just 2.5 million light years away—Andromeda is home to at least a trillion stars. Like the Milky Way, it’s a spiral galaxy ...

The Milky Way is our home galaxy home to 100-400 billion stars (no one is quite sure how many). It’s a spiral galaxy estimated to be about 13.6 billion years old. It's 100,000 light-years across.

A century ago, Edwin Hubble first established that this so-called "spiral nebula" was actually very far outside our own Milky Way galaxy —at a distance of approximately 2.5 million light-years ...

On a clear night with dark skies, you can catch a glimpse of the Milky Way, a luminous arc stretching ... By far the most ...

An artist's impression of the Milky Way, seen edge-on. Image: ESA/Gaia/DPAC, Stefan Payne-Wardenaar The European Space Agency’s Gaia mission has completed one of its major charges: delivering a ...

Observations show Andromeda has a more active star formation history than the Milky Way, potentially due to a past galactic collision. NASA recently released images of the Andromeda galaxy ...