Explanation: How can a round star make a square nebula? This conundrum comes to light when studying planetary nebulae like IC 4406. Evidence indicates that IC 4406 is likely a hollow cylinder, with its square appearance the result of our vantage point in viewing the cylinder from the side. Were IC 4406 viewed from the top, it would likely look similar to the Ring Nebula. This representative-color picture is a composite made by combining images taken by the Hubble Space Telescope in 2001 and 2002. Hot gas flows out the ends of the cylinder, while filaments of dark dust and molecular gas lace the bounding walls. The star primarily responsible for this interstellar sculpture can be found in the planetary nebula's center. In a few million years, the only thing left visible in IC 4406 will be a fading white dwarf star.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: IC 4406 - belyi karlik Publikacii so slovami: IC 4406 - belyi karlik
Sm. takzhe: NGC 2440: kokon novogo belogo karlika Vzryvy na belom karlike RS Zmeenosca IC 4406: tumannost', kotoraya kazhetsya kvadratnoi NGC 2440: zhemchuzhina novogo belogo karlika Planetarnaya tumannost' PK 164 31 Otkrytie belyh karlikov s kislorodnoi atmosferoi. Ostatok sverhnovoi SN 1006 Vse publikacii na tu zhe temu >>