SOHO卫星拍摄的日珥

SOHO卫星拍摄的日珥

ByNASA中文

2022年1月30日 A Solar Prominence from SOHO Image Credit: NASA, ESA, SOHO-EIT Consortium Explanation: How can gas float above the Sun? Twisted magnetic fields arching from the solar surface can trap ionized gas, suspending it in huge looping structures. These majestic plasma arches are seen as prominences above the solar limb. In 1999, this dramatic and detailed image was recorded by the Extreme ultraviolet Image Telescope (EIT) on board the space-based SOHO observatory in the light emitted by ionized Helium. It shows hot plasma escaping into space as a fiery prominence breaks free from magnetic confinement a hundred thousand kilometers above the Sun. These awesome events bear watching as they can affect communications and power systems over 100 million kilometers away on planet Earth. In late…

太空站、日珥与太阳

太空站、日珥与太阳

ByNASA中文

2021年05月04日 Space Station, Solar Prominences, Sun Image Credit & Copyright: Mehmet Ergün Explanation: That’s no sunspot. It’s the International Space Station (ISS) caught passing in front of the Sun. Sunspots, individually, have a dark central umbra, a lighter surrounding penumbra, and no Dragon capsules attached. By contrast, the ISS is a complex and multi-spired mechanism, one of the largest and most complicated spacecraft ever created by humanity. Also, sunspots circle the Sun, whereas the ISS orbits the Earth. Transiting the Sun is not very unusual for the ISS, which orbits the Earth about every 90 minutes, but getting one’s location, timing and equipment just right for a great image is rare. The featured picture combined three images all taken from the same location and at…

镶日珥的半遮太阳

镶日珥的半遮太阳

ByNASA中文

2020年11月2日 Half Sun with Prominence Image Credit & Copyright: Rainee Colacurcio Explanation: What’s happening to the Sun? Clearly, the Sun’s lower half is hidden behind a thick cloud. Averaging over the entire Earth, clouds block the Sun about 2/3rds of the time, although much less over many land locations. On the Sun’s upper right is a prominence of magnetically levitating hot gas. The prominence might seem small but it could easily envelop our Earth and persist for over a month. The featured image is a combination of two exposures, one optimizing the cloud and prominence, and the other optimizing the Sun’s texture. Both were taken about an hour apart with the same camera and from the same location in Lynnwood, Washington, USA. The shaggy texture…