Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

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 ...

Astronomers have traced two mysterious fast radio bursts from space to wildly different places, which suggests the phenomenon ...

The galaxy, located in the constellation Leo, is about the same size as a star cluster within the Milky Way and is about the ...

The full image includes some 2.5 billion pixels compiled from observations spanning more than 1,000 orbits around Earth ...

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

In the meantime, there remains a chance to glimpse Gaia through a small telescope before its final retirement. Uwe Lammers, ...

The intrepid mapping mission has collected more than three trillion observations that'll change the way we see our neck of ...

Hubble has previously imaged the same nebula, with an image released in 2023 and another shared in 2020. You might also recognize the name of this nebula as it was made world famous when the James ...

The Andromeda galaxy is a colossal marvel in our sky, hosting over 1 trillion stars. Now, astronomers have used the Hubble ...

For humans, the most important star in the universe is our sun. The second-most important star is nestled inside the ...

The European Space Agency's Milky Way-mapper Gaia has completed the sky-scanning phase of its mission, racking up more than 3 ...