Galaxies

Astronomers using the James Webb Space Telescope have identified a massive galaxy that shows no rotation, formed less than 2 billion years after the Big Bang. The finding challenges existing models of galaxy evolution.

2026년 04월 29일 AI에 의해 보고됨

An international team of astronomers has determined that the Milky Way's star-forming disk ends around 35,000 to 40,000 light-years from the galactic center. Using stellar age mapping, they found a U-shaped pattern where star formation drops sharply beyond this boundary. Stars farther out are mostly older migrants drifting from inner regions.

Astronomers have directly observed a massive star in the Andromeda Galaxy collapse into a black hole without exploding as a supernova. The star, known as M31-2014-DS1, vanished over several years, leaving behind glowing debris detectable in infrared light. This event provides detailed insights into stellar black hole formation.

2026년 01월 20일 AI에 의해 보고됨

Astronomers have observed a supermassive black hole in the galaxy VV 340a launching a wobbling jet that expels star-forming gas at a rate of about 19 solar masses per year. This process, captured using multiple telescopes including the James Webb Space Telescope, demonstrates how black holes can regulate galaxy evolution by limiting new star formation. The jet's precession, resembling a spinning top, enhances its interaction with surrounding gas.