I was in Brussels visiting the Royal Observatory Belgium to talk about improving the accuracy of the International Sunspot Number. The ISN i...

SDO had another visit from the Moon today, as it passed between SDO and Sun. Here are two AIA 193 images showing the Moon moving onto and r...

May 1, 2017 is SDO's 7th birthday of data collection. We launched on February 11, 2010, reached our final orbit, checked out the instrum...

Notice. The SDO webserver will be down for maintenance today, April 26, 2017 at approximately 2:15pm. The outage for last for approximately ...

Today between 1820 and 1845 UTC (2:20-2:45 pm ET) SDO will perform Momentum Management Maneuver #29. This thruster firing is used to keep th...

Here is a video showing the lunar transit SDO will see on August 21, 2017. While some in the United States will see a Total Solar Eclips...

Today SDO is performing the EVE Cruciform. Images may be missing or blurry due to the motion of SDO. The 2017-094 SDO FDS Quarterly (LongSe...