NASA solar dynamics observatory (SDO) has been stares at our sun for a decade, according to foreign media. Perhaps it is not desirable to stare directly at the nearest star to earth, but it is definitely desirable to enjoy NASA new time-delay video -- which shows how the sun has changed over the decade. SDO orbiting the earth, it has only one goal: to figure out how solar activity shapes the entire solar system.
SDO launched on 11 February 2020. actually it is a three-in-one instrument, first the extreme uv change experiment (EVE) device, which is responsible for tracking extreme uv radiation from the sun, which is the main reason for heating the upper atmosphere of the earth.
Then there is the helioseismic magnetic imager (HMI), which can measure the solar magnetic field with high resolution. This will help scientists understand how the physical processes inside a star manifest themselves in the surface magnetic fields and their activities. Finally, the air imaging assembly (AIA), which monitors the sun's entire disk through seven extreme ultraviolet channels.
SDO's main mission was expected to last five years, but NASA later hoped it would last at least another five years. In the end, the milestone will be reached in June 2020. It is understood that the total data of the decade is 20 million gigabytes, including 425 million high-resolution images. In fact, SDO's instruments capture an image of the sun every 0.75 seconds.
The video will be delivered later
Now, these images are integrated into a fascinating delay video.
In the video, you can see how planets pass through the sun, and how huge volcanic eruptions cause huge damage to the sun's continuously rotating surface. In addition, people can see huge plasma waves, which rotate around the stars at a speed of 3 million miles per hour.
As long as the instrument is in normal working condition, SDO will continue to observe. In fact, NASA believes a second decade of observations is possible. However, NASA and ESA's joint mission, the new solar orbiter, will also join in. It will have a tilted orbit, which has the advantage of better observation of the sun's polar regions. At the same time, the two missions can cooperate to take 3D images of stars and their subsurface structures.