G1.9+0.3 - Comparison of Chandra X-ray and VLA Radio Images : 無料・フリー素材/写真
G1.9+0.3 - Comparison of Chandra X-ray and VLA Radio Images / shehal
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
|---|---|
| 説明 | The most recent supernova in our Galaxy has been discovered by determining the age of the supernova remnant known as G1.9+0.3. To determine the age, astronomers tracked how quickly it is expanding, by comparing a radio image from 1985 to a Chandra image taken in 2007. The expansion rate was confirmed with another radio observation with the VLA in 2008. The difference in size between these images gives clear evidence for expansion, allowing the age of the remnant and the time since the original supernova explosion (about 140 years) to be estimated. (Credit: X-ray (NASA/CXC/NCSU/S.Reynolds et al.); Radio (NSF/NRAO/VLA/Cambridge/D.Green et al.))more info |
| 撮影日 | 2008-05-02 14:02:05 |
| 撮影者 | shehal , Kotte, Sri Lanka |
| 撮影地 |