Named Kohoutek 4-55, the nebula was captured by the Hubble Space Telescope. Planetary nebulae like Kohoutek 4-55 are the ...

For 35 years, the Hubble Space Telescope has taken photos of celestial objects across the universe. Look back at 10 photos ...

The school-bus-sized observatory launched on April 24, 1990 and overcame early setbacks to become one of the most ...