STEREO spacecraft images and in situ measurements combine to show a complete picture of CMEs that paves the way for predicting solar storms like meteorologists predict hurricanes.
Two places on opposite sides of Earth may hold the secret to how the moon was born.
January 24, 2009 marks the point at which the two STEREO spacecraft reach 90 degrees separation, a condition known as quadrature. Since the two STEREO spacecraft went into orbit around the Sun at the beginning of 2007, they have been slowly drifting apart from Earth, and from each other. After two years in solar orbit, the two spacecraft have finally reached quadrature.
You would think that, after 13-years of historic comet discoveries with SOHO and two years of amazing STEREO/SECCHI observations and discoveries, we had put a check-mark in most of the boxes for comet-related achievements. But last week, Australian comet-hunter Alan Watson helped us with yet another historic achievement -- the recovery of a comet! Here's how it unfolded.
Solar flares are the most powerful explosions in the solar system. Packing a punch equal to a hundred million hydrogen bombs, they obliterate everything in their immediate vicinity. Not a single atom should remain intact. At least that's how it's supposed to work.
Coronal jets are small-scale transient ejections of hot gases, or plasma, occurring in the solar atmosphere. During a typical event, about a million tons of matter are ejected at speeds reaching a million miles per hour over a few minutes' time.
Sequences of STEREO satellite images of a solar tsunami blasting across the Sun's million degree atmosphere.
Listen in as members of the mission team discuss looking at solar storms in 3-D and the upcoming launch.
› Mission and Science Q&AThis interactive gallery highlights the best photos of STEREO's prelaunch processing.