A recent blog post at The Astronomy Stackexchange asked whether an AIA image taken during the perihelion passage of Comet ISON showed the c...

Images are flowing again from the SDO JSOC. Many thanks to the people who worked this weekend to repair the system.

Update: Images are flowing again, thanks to everyone for their patience. The SDO HMI/AIA data distribution system is undergoing some eme...

Tomorrow, December 21, 2013 at 1711 UTC (12:11 pm ET) is the winter solstice in the northern hemisphere (the summer solstice in the southern...

SDO is now approaching four years old and we are seeing things that we have to figure out how to handle. Today I'll write about the AIA ...

Today from 1503 – 1551 UTC (10:03-10:51 am ET) SDO watched the moon move across our view of the Sun. The next lunar transit is closer than y...

By now I am sure people are aware that something continues to move along the orbit of Comet ISON in the LASCO observations . It is being d...