NASAのインスタグラム(nasa) - 4月1日 08時23分

The spiral galaxy seen here by our Hubble Space Telescope (@NASAHubble) is located about 130 million light-years away and is classified as an Sc spiral galaxy. But its spiral arms - the dominating feature of spiral galaxies - are almost impossible to see, because it presents itself at an almost perfectly edge-on angle.

Discovered by William Herschel in 1787, this galaxy was host to a fascinating and rare event in 2003. A faint supernova appeared about 8,000 light-years below the central bulge. Supernovae are the huge, violent explosions of dying stars, and the one that exploded in this galaxy - not visible in this much later image - was classified as a Type Ib/c supernova. It was particularly interesting because its spectrum showed strong signatures of calcium.
Calcium-rich supernovae are rare and hence of great interest to astronomers. Astronomers still struggle to explain these particular explosions as their existence presents a challenge to both observation and theory. In particular, their appearance outside of galaxies, their lower luminosity compared to other supernovae, and their rapid evolution are still open questions for researchers.

Credit: ESA/Hubble & NASA

#nasa #space #hubble #spothubble #telescope #galaxy #supernova #lightyears #beautiful #pictureoftheday #science #astronomy

[BIHAKUEN]UVシールド(UVShield)

>> 飲む日焼け止め！「UVシールド」を購入する

• NASAHubble