The GREGOR underground telescope can capture structures just 50 km wide above the surface of the Sun after the upgrade.
Sunspot in high-resolution photo on July 30. Photo: Science Alert.
GREGOR, one of the most powerful solar telescopes in the world, has just been upgraded, Science Alert on 4/9 reported. The GREGOR subterranean telescope can now observe structures just 50 km wide above the surface of the Sun. After the upgrade, this Spanish telescope also captured Europe’s top high-resolution images of the Sun.
“This is a very interesting but also challenging project. In just one year, we completely redesigned our optical, mechanical and electronic equipment to achieve the best possible image quality.” , Says Lucia Kleint, project leader of GREGOR, physicist at Leibniz Institute of Solar Physics (KIS), shares.
A blockade by Covid-19 often hinders scientific research, but this is a special case. According to KIS, the scientists stuck at the GREGOR observatory when Spain blockade in March. Instead of wasting time, they built an optical lab. The team of experts also successfully overcome two serious problems caused by a pair of mirrors, causing images to be blurred and distorted.
In July, when the blockade ended and there was no blizzard in the way, the first thing the GREGOR scientists did was get the upgraded telescope operational. One of the remarkable results of GREGOR is sunspot photography on 30/7.
Black spots are areas that appear temporarily on the surface of the Sun. There, a particularly strong magnetic field prevents normal convective activity on this star’s surface. The black stain looks darker because it is cooler than the surrounding matter.
Scientists are interested in black marks because they can break, mess and reconnect. The reconnection of the magnetic field leads to the release of enormous energy, causing solar flares and coronary eruptions (CME). This phenomenon can disrupt the orientation and communication of satellites on Earth. High-quality images such as GREGOR images will help scientists understand more about dark spots and other structures on the Sun.