https://padlet.com/0902688/46ewrz68839h en-us 2017-04-18 23:32:53 UTC 2025-11-02 05:16:24 UTC hello@padlet.com 0902688 https://padlet.com/0902688/46ewrz68839h/wish/166915752 2017-04-19 02:50:00 UTC https://padlet.com/0902688/46ewrz68839h/wish/166915752 0902688 https://padlet.com/0902688/46ewrz68839h/wish/166915994 The Helix Nebula (NGC 7293) is the aftermath of a dying star 650 light years away, in the constellation of Aquarius. It is also called "The Eye" for the way it looks. ]]> 2017-04-19 02:52:13 UTC https://padlet.com/0902688/46ewrz68839h/wish/166915994 0902688 https://padlet.com/0902688/46ewrz68839h/wish/166916506 First discovered by the German astronomer Karl Ludwig Harding in the early 19th century. 
It has an apparent visual magnitude of 7.6. 
The nebulas age is estimated to be around 10,600 years.]]> 2017-04-19 02:56:57 UTC https://padlet.com/0902688/46ewrz68839h/wish/166916506 0902688 https://padlet.com/0902688/46ewrz68839h/wish/166917253 2017-04-19 03:04:58 UTC https://padlet.com/0902688/46ewrz68839h/wish/166917253 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167162820 The Helix Nebula was the first planetary nebula discovered to have cometary knots. Cometary knots are believed to be a common feature in the evolution of planetary nebulae. They are generally larger than the Solar System. They have cusps and tails. There are an estimated 20,000 cometary knots in the Helix Nebula.]]> 2017-04-20 02:05:20 UTC https://padlet.com/0902688/46ewrz68839h/wish/167162820 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167163228 2017-04-20 02:09:37 UTC https://padlet.com/0902688/46ewrz68839h/wish/167163228 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167163391 2017-04-20 02:11:06 UTC https://padlet.com/0902688/46ewrz68839h/wish/167163391 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167163508 2017-04-20 02:12:15 UTC https://padlet.com/0902688/46ewrz68839h/wish/167163508 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167163649 2017-04-20 02:14:02 UTC https://padlet.com/0902688/46ewrz68839h/wish/167163649 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167163689 Another intriguing fact about the Helix Nebula is that it appears similar in a wide range of wavelengths. From ultraviolet to infrared, "The Eye" is still easily distinguishable.

]]> 2017-04-20 02:14:26 UTC https://padlet.com/0902688/46ewrz68839h/wish/167163689 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167164773 2017-04-20 02:24:27 UTC https://padlet.com/0902688/46ewrz68839h/wish/167164773 0902688 https://padlet.com/0902688/46ewrz68839h/wish/167403613 https://www.nasa.gov/multimedia/imagegallery/image_feature_2368.html
http://www.space.com/14282-helix-nebula-eye-amazing-photo.html
http://www.constellation-guide.com/helix-nebula-ngc-7293-caldwell-63-in-aquarius/
https://www.nasa.gov/mission_pages/spitzer/news/spitzergalex20121003.html
https://www.nasa.gov/mission_pages/spitzer/news/spitzergalex20121003.html]]> 2017-04-21 01:50:26 UTC https://padlet.com/0902688/46ewrz68839h/wish/167403613