Sun’s shock wave goes missing
Spacecraft observations redraw astronomers’ ideas about the local stellar environment
By Nadia Drake, 11:02 AM May 10, 2012
The sun isn’t quite the speed demon scientists once suspected. It chugs around the galactic center at a relatively pokey 83,500 kilometers per hour — or roughly 11,000 kilometers per hour slower than expected, says a report appearing online May 10 in Science.
While that might not sound like a big deal, the sun’s slower pace clashes with theories describing the solar system’s local environment — a protective, sun-blown bubble called the heliosphere. The sun’s speed helps shape the size and b...
Source URL: https://www.sciencenews.org/article/sun’s-shock-wave-goes-missing