As our telescopes grow more powerful, astronomers are uncovering objects that defy conventional wisdom. The latest example is the discovery of a planet-like object circling a brown dwarf. It’s the ...

This illustration shows the rapidly rotating, highly magnetized white dwarf with the smallest radius ever found, with Earth's moon shown nearby for a size comparison. With a radius of ~2,140 km, just ...

Learning the parts of the solar system used to be a simple thing — basically, all that really mattered was the sun and nine planets. The mnemonic My Very Educated Mother Just Served Us Nine Pizzas ...