The appearance and disappearance of sunspot AR2738 The appearance and disappearance of sunspot AR2738. 13 days. 태양 흑점 AR2738의 나타남과 사라짐. 13일간의 동영상. 2019. 04.07. - 04.20. 01:00 UTC. 2019. 04.07. - 04.20. 10:00 KST. https://youtu.be/PsM5XRnBoc8 Image credit: NASA/Solar Dynamics Observatory (SDO). Video creator: Bum-Suk Yeom. 2019. 4. 21. 이전 1 다음