- Space
- By Tudor Vieru
- February 10th, 2012
Anniversary: RHESSI Turns 10, Sees 40,000+ Solar Flares
This is one of the most prolific solar observatories out there
- Space
- By Dan Talpalariu
- October 3rd, 2008
Sun's Sphere Is Not Perfect
NASA’s RHESSI spacecraft helped measure the roundness of our Sun