Latest John Monnier Stories
A new study has used an innovative type of telescope to show that the bright north-sky star Vega may be more than 200 million years older than scientists previously believed.
The hottest stars in the universe spin so fast that they get a bit squished at their poles and dimmer around their middle.
For the first time, astronomers have directly observed the mysterious dark companion in a binary star system that has puzzled skywatchers since the 19th century.
The most detailed measurements to date of the dusty disks around young stars confirm a new theory that the region where rocky planets such as Earth form is much farther away from the star than originally thought. These first definitive measurements of planet-forming zones offer important clues to the initial conditions that give birth to planets.