
NASA says a U.S.-European solar observatory has observed a giant example of a phenomenon knows as a coronal hole in the sun's outer atmosphere. The European Space Agency/NASA Solar and Heliospheric Observatory, or SOHO, captured an image of a huge coronal hole hovering over the sun's north pole on July 18, NASA reported Monday. Dark, low density regions of the sun's corona, its outermost atmosphere, coronal holes contain little solar material and have lower temperatures, making them appear much darker than their surroundings. Such holes are a source of a high-speed wind of solar particles that streams off the sun some three times faster than the slower wind elsewhere in the sun's atmosphere, creating space weather that can affect satellites in orbit and communications on Earth, NASA said. The exact cause of coronal holes is unclear, scientists said, although they appear to correlate to areas on the sun where magnetic fields rise up and away, failing to loop back down to the sun's surface as they do elsewhere.
GMT 16:03 2018 Wednesday ,28 November
Executive Office of Arab Ministers of Communications starts in CairoGMT 09:09 2018 Thursday ,15 November
Syria, Iran discuss enhancing scientific cooperationGMT 09:53 2018 Wednesday ,07 November
Drones bring innovation to Africa, from Morocco to MalawiGMT 11:31 2018 Wednesday ,17 October
Japan high-tech fair CEATEC opens in ChibaGMT 14:03 2018 Monday ,08 October
American scientists awarded 2018 Prize in Economic SciencesGMT 07:35 2018 Monday ,08 October
First foreign space agency opens in Abu DhabiGMT 10:47 2018 Sunday ,07 October
Bahrain hosts World Robotics Olympiad2018GMT 09:20 2018 Thursday ,04 October
UAE participates in World Space WeekMaintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2025 ©
Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2025 ©
Send your comments
Your comment as a visitor