Reposted from @galaxiesways (@get_regrann) - Intense close up view of a SunSpot! '4%,* This short video for Active region tracking of Sun Spot AR10940, clearly shows the outer granulation and light bridges surronding the dark centre of the sun spot. The bright, elongated structures that divide sunspot umbrae (the darkest parts in the spot centers) are called light bridges and are important to understand the process of sunspot formation and disintegration. Sunspot looks dark because its temperature is lower than that of the surface of the Sun (photosphere). Strong magnetic fields of —3,000 gauss exist in the sunspot (The strength of terrestrial magnetic field is —0.3 gauss). Because this strong magnetic field hinders the transfer of heat generated at the center of the Sun to the surface, the temperature in the sunspot is lower than in the surrounding regions. . . #Galaxiesways for a chance to get Featured . . #space #astronomy #astrophysics #astronomylover #astronomyfacts #astrophotography #astronaut #science #sciencenerd #nerd #planets #nasa #spacephotography #universe #star #exploration #galaxies #milkyway #sun #astronomer - #regrann https://www.instagram.com/p/Bz9P4IMBVCK/?igshid=htmams8xbyyu