Compared with the universe as a whole, Earth is quite young at 4.5 billion years old. Scientists arrived at this number because of evidence from radiometric dating, which measures the rate of ...

Joe MurchisonPlacerville, California Astronomers widely accept that the universe formed in theContinue reading "How can the visible universe be 46 billion light-years in radius when the universe ...

has just solved a 20-year-old mystery about how ancient stars could host massive planets. In the early 2000s, the Hubble ...

Once thought to be 8 billion years old, the star HD 110067 — famous for its six synchronized exoplanets — may be only 2.5 ...

Galaxies in the early universe tend to be clumpy, but the new JWST discovery of a "grand design" spiral galaxy just 1.5 ...

Each year, researchers make new observations and revisit old data that redefines what we know about how Earth, the solar system, galaxy, heck—the whole universe—came to be. From stunning ...