The NASA Solar Dynamics Observatory regularly observed the star throughout the year – from January 1, 2015 to January 28, 2016. Scientists have collected the data in one video.
NASA astronomers have compiled a year of observations in one video. On it you can see in detail how the Sun has changed throughout the year.
For 12 months, the observatory took a picture of the Sun every 12 seconds at 10 different wavelengths. Later, a single panorama was sewn from them. All images in the video are captured at a wavelength of 171 angstroms. In the video, you can see that over time, the Sun increases and decreases slightly in size. Why is this happening? The fact is that the distance between the satellite of the observatory and the Sun changes during the year.
The Solar Dynamics Observatory (SDO) is NASA’s space observatory for studying the Sun, designed for 5 years of operation. It was launched on February 11, 2010 as part of the Living With a Star (LWS) program. The goal of the LWS program is to develop the scientific knowledge necessary to effectively address aspects of the Solar-Terrestrial relationship that directly affect life and society. The SDO’s goal is to understand the influence of the Sun on the Earth and near-Earth space by studying the solar atmosphere at small scales of time and space and at many wavelengths simultaneously.
Since its launch in 2010, NASA’s Solar Dynamics Observatory has studied how the Sun affects space weather – dynamic conditions in space that affect the entire star system, including Earth. SDO’s measurements of the Sun – from the interior to the atmosphere, magnetic field and energy output – have greatly contributed to the understanding of the closest star to our planet.