A Cat’s Eye in the Stellar Dragon

K of lightsome days away in the configuration Draco shines the Cat ’s Eye planetary nebula . Formed when a star transitions into a red giant and shed its outer layer , the erratic nebula will shed gas until only a hot , slow core of a blank midget is left behind .

The Cat ’s Eye nebula is 3,000 low-cal year away in the constellation Draco , and is only partway through the transition from red giant to white dwarf . The transition occurs as the raging , dense core force back fast winds , spreading the turn out petrol into a graceful nebula . A white dwarf has run through its reaction pathways , with no more practicable fusion outlets . or else , the star is tolerate from prostration by electron corruption insistence , radiating its remaining energy into space . Over prison term , the hot , bright white midget will cool and dim through red and chocolate-brown before sputtering out totally as a cold , black dwarf . Theoretically , the universe is too young to have any black dwarfs yet , but one twenty-four hour period distance will be littered with them .

The Cat ’s Eye is a world-wide nebula , but planets have nothing to do with this kick the bucket star . The name is a historical relict leftfrom early attempts at catalogue astronomic target , when the colourful gaseous state reminded the cataloguer of nearby gas pedal giants .

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The composite image is a blend of Chandra X - ray observation tower data in blue , and visible sluttish information from the Hubble Space Telescope in red and purpleness . The gasolene cloud is expanding at roughly 4 million miles per hour , while the wiz should burst into a white midget in a few million years .

simulacrum credit :X - ray : NASA / CXC / SAO ; Optical : NASA / STScI. For more beautiful X - Ray images , check out this view ofa galaxy collision . For another nebula , admire thisone in infrared .

Chandra

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