Nasa has unveiled the first images from a new satellite designed to predict disruptive solar storms, and scientists say they are already learning new things.
Researchers have showed off brightly coloured images and short movie clips of the sun from the Solar Dynamics Observatory in a webcast.
The satellite was launched on 11 February.
Dean Pesnell, the chief scientist, says it has already disproved at least one theory, but he did not give any details.
Richard Fisher, director of Nasa's heliophysics division, says the satellite is operating flawlessly.
It carries three instrument packages, one built by the University of Colorado's Laboratory for Atmospheric and Space Physics and two built by Lockheed Martin in Palo Alto, California.