STARS: The Ring Nebula Has an Iron Bar.

The article focuses on recent astronomical discoveries involving stellar phenomena and lunar geology. Astronomers led by Kishalay De identified a second candidate for a "failed supernova" in the Andromeda Galaxy, where a massive star (about 12–13 solar masses) appears to have collapsed directly into a black hole without a typical supernova explosion, evidenced by mid-infrared dimming and disappearance in visible light. Separately, researchers using the William Herschel Telescope discovered a large gaseous iron "bar" spanning the Ring Nebula (Messier 57), possibly originating from a vaporized planet, though this remains speculative. Additionally, China’s Chang’e 6 mission returned lunar farside samples from the South Pole–Aitken Basin, revealing rocks up to 4.247 billion years old and providing evidence against the previously hypothesized Late Heavy Bombardment, suggesting a smoother early solar system evolution. [Extracted from the article]