Massive hole, 30 times Earth's size, spotted on the Sun
Image Credit: NewsBytes
A massive hole, called the coronal hole, was spotted on the Sun by NASA's Solar Dynamics Observatory (SDO). The giant hole can fit about 20-30 Earths across. Coronal holes are not actual holes on the Sun's surface. They do not glow as brightly as their surroundings and appear dark on the solar surface because they are cooler than their surroundings.