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News Release 532 of 948

December 19, 2001 12:00 AM (EST)

News Release Number: STScI-2001-34

Hubble Sends Season's Greetings from the Cosmos to Earth

December 19, 2001: Looking like a colorful holiday card, this image from NASA's Hubble Space Telescope reveals a vibrant green and red nebula far from Earth, where nature seems to have put on the traditional colors of the season. These colors, produced by the light emitted by oxygen and hydrogen, help astronomers investigate the star-forming processes in nebulas such as NGC 2080. Nicknamed the "Ghost Head Nebula," NGC 2080 is one of a chain of star-forming regions lying south of the 30 Doradus nebula in the Large Magellanic Cloud that have attracted special attention. These regions have been studied in detail with Hubble and have long been identified as unique star-forming sites. 30 Doradus is the largest star-forming complex in the whole local group of galaxies.


Q & A: Understanding the Discovery

  1. 1. What do the image colors tell us about the chemical composition of NGC 2080?


  2. The light from the nebula captured in this image is emitted by two elements, hydrogen and oxygen. The red and the blue light are from regions of hydrogen gas heated by nearby stars. The green light on the left comes from glowing oxygen. The energy to illuminate the green light is supplied by a powerful stellar wind (a stream of high-speed particles) coming from a massive star just outside the image. The white region in the center is a combination of all three emissions and indicates a core of hot, massive stars in this star-formation region. The intense emission from these stars has carved a bowl-shaped cavity in the surrounding gas.

  3. 2. What gives this nebula its distinct shape?


  4. The two bright regions in the center of the nebula are referred to as the "eyes of the ghost" and are named A1 (left) and A2 (right). They are very hot, glowing "blobs" of hydrogen and oxygen. The bubble in A1 is produced by the hot, intense radiation and powerful stellar wind from a single massive star. A2 has a more complex appearance due to the presence of more dust, and it contains several hidden, massive stars. The massive stars in A1 and A2 must have formed within the last 10,000 years, since their natal gas shrouds are not yet disrupted by the powerful radiation of the newly born stars.

 
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Credit: NASA, ESA & Mohammad Heydari-Malayeri (Observatoire de Paris, France)