Researchers say they've discovered the largest known object in the universe, a galactic superstructure called Quipu.

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 ...

Unexpected epochs of stillness that punctuate the cosmic timeline could offer a natural explanation for dark matter and many ...

A new telescope could launch as early as late February. SPHEREx will look into deep space and also search for organic ...