A Solar Prominence Erupts in STEREO . ... Credit Copyright: STEREO Project , NASA Explanation: What does a solar prominence look like in three dimensions? To help find out, NASA launch ed the STEREO satellites to keep a steady eye on the Sun from two different vantage points. The STEREO satellites orbit the Sun nearly along Earth's orbit, but one (dubbed Ahead) currently leads the Earth, while the other (dubbed Behind) currently trails. ... NASA Web Site Statements, Warnings, and Disclaimers . ...