The Helix Nebula is an example of a planetary nebula. Though it looks like a bubble or eye from Earth's point of view, the Helix is actually a trillion-mile-long tunnel of glowing gases. This Hubble ...
NASA's SOFIA detected the blue areas (20 microns) near the center of this composite image of the Swan Nebula, revealing gas as it’s heated by massive stars located at the center Astronomers combined ...
Hubble Heritage images are famously known for colour images of the universe captured by the NASA Hubble Space Telescope. These images are part of the Hubble Heritage project which consists of a ...