See the Southern Ring Nebula in 3D
Planetary nebulae are one of nature’s most stunning visual displays. The name is confusing because they are the remnants of stars, not planets. But this does not detract from their …
Planetary nebulae are one of nature’s most stunning visual displays. The name is confusing because they are the remnants of stars, not planets. But this does not detract from their …
Researchers may have solved the mystery of why a distant galaxy surrounded by an unusually perfect “Einstein ring” is denser than it should be: The giant galaxy has been discovered …