Sharpless 249 and the Jellyfish Nebula
Image Credit & Copyright: Eric Coles
Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic mosaic. The scene is anchored below by bright star
Eta Geminorum, at the foot of the
celestial twin, while the Jellyfish Nebula is the brighter arcing ridge of emission with tentacles dangling below and left of center. In fact, the cosmic jellyfish is part of bubble-shaped
supernova remnant IC 443, the expanding debris cloud from a
massive star that exploded. Light from the explosion first reached planet Earth over 30,000 years ago. Like its cousin in
astrophysical waters the
Crab Nebula supernova remnant, the Jellyfish Nebula is
known to harbor a neutron star, the remnant of the collapsed stellar core. An emission nebula cataloged as
Sharpless 249 fills the field at the upper right. The Jellyfish Nebula is about 5,000 light-years away. At that distance,
this narrowband composite image presented in the Hubble Palette would be about 300 light-years across.
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