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 research team may have discovered a star with an exoplanet that is so fast that both will leave the Milky Way.

Astronomers have found a supermassive black hole in the Large Magellanic Cloud. This black hole is 600,000 times the mass of ...

Predictions are uncertain, but the solar system may be pushed farther from the galactic core or even ejected entirely from ...

Visual observers and astrophotographers alike can find something amazing to observe along the plane of our galaxy.

In January 2025, the city added another feather to its cap when it launched a new Astro Trail, a curated collection of ...

Quipu, Hercules, Serpens–Corona Borealis and Sculptor–Pegasus are all larger than the fifth and final superstructure ...

Scientists have officially given a name to the largest solar structure in the known universe. Astronomers have found the ...

Estimating distances in astronomy is challenging ... His measurements marked the end of the Great Debate about the Milky Way’s size and the nature of the nebulae. Hubble wrote about his ...

The Andromeda galaxy helped Edwin Hubble settle a great debate in astronomy. Stocktrek Images via Getty Images ...