Celestial Sundays: Butterfly Nebula
Nebula is an intersteller cloud of gas, dust and plasma. They have no definate shapes in nature. They take all kinds. Like this one, the Butterfly Nebula, NGC 2346.
The Butterfly Nebula is 2000 light years away in the direction of the constelation Monoceros. The following are the description from Nasa:
It represents the spectacular "last gasp" of a binary star system at the nebula's center. At the center of the nebula lies a pair of stars that are so close together that they orbit around each other every 16 days. This is so close that, even with Hubble, the pair of stars cannot be seen as two separate components. Astronomers believe that one of the stars, when it evolved and expanded to become a red giant, actually swallowed its companion star in an act of stellar cannibalism. The resulting interaction led to a spiraling together of the two stars, culminating in ejection of the outer layers of the red giant. Most of the outer layers were ejected into a dense disk, which can still be seen in the Hubble image, surrounding the central star.
Source: Nasa
This is not the only stellar object that resembles a butterfly wing. Take a look at this planetary nebula, MyCn18.
It is located about 8000 light years away. Taken in false color by the Hubble Space Telescope, it shows a rather young stellar object. Young in that the process of death that formed the nebula happened fairly recently in galactic terms.
Finally, I would like to end today's post with a beautiful picture of another nebula, created by a composite of X-Ray and optical images. The nebula in question is the Cat's Eye Nebula, NGC 6543. Have a nice Sunday people.
Image source: Nasa


