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 ...

"We found that some comets in the inner Oort cloud form a long-lasting spiral structure." Spirals are a repeating theme in ...

At the of age 30, he arrived at Mount ... galaxies were all moving away from the Milky Way. Hubble’s results suggested the farther away a galaxy was, the faster it was moving away from Earth.

The center of our Milky Way galaxy is hidden from the prying eyes of optical telescopes by clouds of obscuring dust and gas. NASA's Spitzer Space Telescope's infrared cameras penetrate much of the ...

Scientists have pointed the James Webb Space Telescope at the center of the Milky Way galaxy, which is home to the ...

The Milky Way galaxy is packed with hydrogen atoms, and these atoms are constantly emitting 21 cm radiation. The best part is that this radiation can travel long distances through the interstellar ...

SPHEREx is set to launch at Friday from California. Here are five things to know about NASA's latest advanced space telescope ...

A study based on the trajectory of nine fast-moving stars observed at the fringes of the Milky Way provides strong evidence for the existence of a supermassive black hole inside the Large Magellanic ...