Sentences with phrase «discovered planetary nebula»
IT LOOKS like a soap bubble or perhaps even a camera fault, but the image at right is a newly discovered planetary nebula.
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«During the past few years our group,» says David Jones, an astrophysicist at the IAC and another of the authors on the paper, «has discovered that the planetary nebulae with the biggest discrepancies in their abundances are usually associated with binary central stars which have been through a phase with a common envelope, that is to say the process of expansion of the more massive of the two stars has meant that the other star is orbiting within its outer atmosphere, and the viscosity has brought the stars very close to one another.
Though the Cat's Eye Nebula was one of the first planetary nebulae to be discovered, it is one of the most complex such nebulae seen in space.
The additional 42 entries were mostly discovered earlier, and most of them (32) are open star clusters; there are no planetary nebulae, supernova remnants, elliptical and lenticular galaxies among them, and the only spiral galaxy in this list is our own, the Milky Way.
Similar knots have been discovered in other nearby planetary nebulae that are all part of the same evolutionary scheme.
The Dumbbell Nebula Messier 27 (M27, NGC 6853) is perhaps the finest planetary nebula in the sky, and was the first planetary nebula ever discoNebula Messier 27 (M27, NGC 6853) is perhaps the finest planetary nebula in the sky, and was the first planetary nebula ever disconebula in the sky, and was the first planetary nebula ever disconebula ever discovered.
The Cat's Eye Nebula was one of the first planetary nebulae to be discovered and is one of the most complex such nebulae seen in space.