India.com4 天
NGC 7293, better known as the Helix nebula, displays its ultraviolet glow courtesy of NASA ...
In this image from NASA's Spitzer Space Telescope, "cometary knots" on the Helix Nebula show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation.
Knowridge6 天
There’s a smashed planet at the heart of the Helix Nebula
The Helix Nebula. Credit: X-ray: NASA/CXC/SAO/Univ Mexico/S. Estrada-Dorado et al.; Ultraviolet: NASA/JPL; Optical: NASA/ESA/STScI (M. Meixner)/NRAO (T.A. Rector ...
Digit6 天
7 mesmerising nebula images captured by NASA Hubble Space Telescope
The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula's eerie interior bluish glow. The Bubble Nebula is 7 light-years across and resides 7,100 ...