This afternoon SDO will do the EVE cruciform, moving in a plus sign figure to measure how light reflects inside the instrument. From 1800-2300 UTC (1:00-6:00 pm ET) the Sun will appear to move around and be blurry. Enjoy!
Wednesday, January 6, 2016
Tuesday, January 5, 2016
Check out these:
My favorite image of 2015 was the transit eclipse on Sept. 13, 2015. Here is an example of what that looked like in AIA 171. The sharp curve on the left is the Moon and the blurry curve at the top is the Earth moving out of the way. It was the first transit eclipse seen by SDO (probably a first for NASA) and the only lunar transit seen by SDO that was also seen as a solar eclipse on the Earth. Check out the movies of the transit eclipse at NASA.
I want to thank and congratulate the great team that works to keep SDO data and science flowing.
Even after almost 6 years in orbit SDO is GO!
Tuesday, December 29, 2015
Sunday, December 27, 2015
Monday, December 7, 2015
But that brings up occultations that SDO will see. Next year we will see a transit of Mercury across the disk of the Sun on May 9, 2016. Here is a movie of the transit (using our predicted ephemeris, but it should be fairly close.)
Mercury is smaller and further from the Earth, so, compared to the transit of Venus in 2012, it will be a smaller disk as it passes between SDO and the Sun. Due to the shorter orbital period, transits of Mercury are more common than transits of Venus.
Johannes Kepler predicted a transit of Mercury would occur in November 1631. The first observed transit of Mercury was on November 7, 1631 by Pierre Gassendi. This was the first observed planet transit and showed that Kepler's equations of planetary motion could be used to predict the positions of planets.
SDO will provide near-realtime pictures of the Mercury Transit at a dedicated webpage. More details as the time approaches.
While you are waiting, grab your binoculars and go watch Venus disappear behind the Moon!
Thursday, November 5, 2015
When SDO was launched TVs were displaying 720p resolution. In the five years since we have seen TV screens at 1080p and now UltraHD (3840 pixels by 2160 pixels.) This means we can show half of the Sun in full SDO resolution on commercially available screens. As a result, NASA has released a new of 4k ultra-HD movies of SDO imagery. These are also on YouTube. But to get the full impact of the UltraHD resolution you need to download the movies from SVS website.
The SDO webpage also has a list of UltraHD movies. We are planning to start releasing daily UltraHD movies.
If only UltraHD allowed us to show the entire disk of the Sun at the native resolution of the SDO imagers! But that must await the next generation of screens.