In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

But astronomers worry they may not be accounting for all the light inside galaxies that may be too tiny, too diffuse, or too far away for other telescopes to have detected. "SPHEREx is going to ...

By looking ever further back in time, the James Webb Space Telescope is at last revealing the first galaxies – and a very ...

It is not surprising that there are regions that are more densely populated by galaxies, and regions that are less populated.

Scientists didn't expect that stars would be able to still form in the dwarf galaxy known as Leo P, which the James Webb Telescope recently imaged.