Classic Hubble Image of Planetary Nebula IC 418
This classic Hubble image from 2000 shows planetary nebula IC 418 glowing like a multifaceted jewel with enigmatic patterns. IC 418 lies about 2,000 light-years from Earth in the direction of the constellation Lepus.
A planetary nebula represents the final stage in the evolution of a star similar to our sun. The star at the center of IC 418 was a red giant a few thousand years ago, but then ejected its outer layers into space to form the nebula, which has now expanded to a diameter of about 0.1 light-year. The stellar remnant at the center is the hot core of the red giant, from which ultraviolet radiation floods out into the surrounding gas, causing it to fluoresce. Over the next several thousand years, the nebula will gradually disperse into space, and then the star will cool and fade away for billions of years as a white dwarf. Our own sun is expected to undergo a similar fate, but fortunately, this will not occur until some 5 billion years from now.
The Hubble image of IC 418 is shown with colors added to represent the different camera filters used that isolate light from various chemical elements. Red shows emission from ionized nitrogen (the coolest gas in the nebula, located furthest from the hot nucleus), green shows emission from hydrogen and blue traces the emission from ionized oxygen (the hottest gas, closest to the central star). The remarkable textures seen in the nebula are newly revealed by the Hubble Space Telescope, and their origin is still uncertain.
Credit: Space Telescope Science Institute
- Are We Alone? Discovery of Billions of Earth-Like Planets May Hold the Answer
- Comet NEOWISE Has Suddenly Become Visible to the Unaided Eye
- Vital Clues to Unsolved Mysteries in Astrophysics – Including Expansion of the Universe – From Colliding Neutron Stars
- Motions in the Sun, 125,000 Miles Deep, Reveal Inner Workings of Sunspot Cycle
- Nyx: Stellar Stream of Stars Discovered in Milky Way That Originated in Another Galaxy
- Mysterious Spinning Neutron Star Detected in the Milky Way With Extraordinary Properties
- Biologists Identify Vulnerability in Brain Cancer Cells
- Ceramic Nanotubes Engineered As Thermal Antennas With Heat Radiation Control
- Astronomers Discover a Heavy Metal Fragment of a Planet
- NASA Set to Launch 5 Rockets to Study High-Altitude Jet Stream
- Study Shows Muscle Contraction May Contribute to Stroke Damage
- New Research Suggests That Sugar Molecules Exist in Deep Space
- Natural ‘Breakdown’ of Chemicals May Guard Against Lung Damage in 9/11 First Responders
- People With Parkinson’s Experienced Significant Improvements From Playing Ping-Pong