Publications of the Astronomical Society of the Pacific, Vol. 81, No. 479 (April 1969), pp. 154-167 (14 pages) The expected thermal emission for each of 49 planetary nebulae has been calculated on the ...

ABSTRACT Recent analyses of nebular spectra have resulted in discrepant abundances from CNO forbidden and recombination lines. We consider independent methods of determining ion abundances for ...

Colorful and wispy Sharpless 2-296 forms the “wings” of an area of the sky known as the Seagull Nebula — named for its resemblance to a gull in flight. This celestial bird contains a fascinating mix ...

Images of two iconic planetary nebulae taken by the Hubble Space Telescope are revealing new information about how they develop their dramatic features. Researchers from Rochester Institute of ...

IN the course of a radio survey of bright emission nebulæ with the 1,500-ft. Sydney cross-aerial, some fourteen nebulæ were studied at a wave-length of 3.5 m. Six were probably observed in emission, ...

A rosy red nebula takes center stage in a new photo from the European Southern Observatory (ESO). The expansive cloud of dust and gas, known as IC1284, is an emission nebula, a bright, diffuse cloud ...

Astronomers have discovered an unusual laser emission that suggests the presence of a double star system hidden at the heart of the 'spectacular' Ant Nebula. The extremely rare phenomenon is connected ...

Emission Nebulae Emission nebulae are so named because they emit their own light. This type of nebula forms when the intense radiation of stars within or near the nebula energizes the gas. A star’s ...

The Hubble Space Telescope may be experiencing problems this week, but it continues to offer a massive trove of data for astronomers to explore — including this week’s image of the beautiful and ...

The North America Nebula (NGC 7000) and the Pelican Nebula (IC 5070), located in the constellation Cygnus, are prominent emission nebulae. These nebulae are separated by a dark dust lane and are ...

(PhysOrg.com) -- The Crab Nebula is the remnant of a supernova. Its precursor star exploded in 1054 AD in an event that was recorded by Chinese and (quite probably) Anasazi Indian astronomers. It is ...