NASA's Kepler and Swift missions have found rapidly rotating stars producing more than 100 times our own sun's peak X-ray emission. Spinning so fast they resemble pumpkins, the stars likely formed by mergers of sun-like stars.
NASA's STEREO mission, which launched 10 years ago, uses an instrument called a coronagraph to study the the sun's outer atmosphere. Here's a guide to reading a STEREO image and learning key features of coronagraph data.
Launched 10 years ago, on Oct. 25, 2006, the twin spacecraft of NASA's STEREO mission have given us unprecedented views of the sun, including the first-ever simultaneous view of our entire star at once.
Via a NASA-led citizen science project, eight people with no formal training in astrophysics helped discover what could be a fruitful new place to search for planets outside our solar system – a large disk of gas and dust encircling a star known as a circumstellar disk.