quinta-feira, 18 de maio de 2017

Astronomy picture of the day - 2017 May 18 - Simeis 147: Supernova Remnant

See Explanation.  Clicking on the picture will download
 the highest resolution version available.
Simeis 147: Supernova Remnant 
Image Credit & CopyrightDaniel López (El Cielo de Canarias) / IAC

Explanation: It's easy to get lost following intricate filaments in this detailed image of faint supernova remnant Simeis 147. Also cataloged as Sharpless 2-240 it goes by the popular nickname, the Spaghetti Nebula. Seen toward the boundary of the constellations Taurus and Auriga, it covers nearly 3 degrees or 6 full moons on the sky. That's about 150 light-years at the stellar debris cloud's estimated distance of 3,000 light-years. This composite includes image data taken through narrow-band filters, enhancing the reddish emission from ionized hydrogen atoms to trace the shocked, glowing gas. The supernova remnant has an estimated age of about 40,000 years, meaning light from the massive stellar explosion first reached Earth 40,000 years ago. But the expanding remnant is not the only aftermath. The cosmic catastrophe also left behind a spinning neutron star or pulsar, all that remains of the original star's core.