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 ...

Explore the James Webb Space Telescope's incredible discovery: a cosmic alignment revealing the teenage years of our Milky ...

Located approximately 27,000 light-years (one light year equals approximately nine trillion kilometres) from Earth — relatively close when it comes to galactic black holes — Sag A* has an estimated ...

Astronomers have spied a monster radio jet in the distant universe that’s twice the width of the Milky Way galaxy. The ...

NASA said the system is thought to be moving at least 1.2 million miler per hour, nearly twice as fast as our solar system.

Among the roughly 10 billion white dwarf stars in the Milky Way galaxy, a greater number than previously expected ...

From supermoons to a total eclipse to the national park’s biggest and best-attended star parties, these are the must-see celestial shows of the year ...

Telescopes around the world have spotted a monster radio jet streaming from a quasar dating back to the first 1 ...

SpaceX early Saturday launched another 21 Starlink satellites aboard a record-setting Falcon 9 first-stage booster from ...

A European Space Agency telescope has discovered its first "extremely rare" Einstein ring in a galaxy "not too far away" ...

A neutrino detector submerged in the Mediterranean Sea has sniffed out the most energetic ghost particle yet. The newly ...