Article: A cosmic egg wrapped in a gaseous shell. (planetary nebulas found)

Article: Of planets and planetary nebulas. (gravitational ...
Science News;  February 1, 1997 ;     700+ words ... ... earlier. He named the new objects planetary nebulas. Later observations revealed that ... Two astronomers now suggest that planetary nebulas may have an intimate connection with ... relatively bright, and presumably young planetary nebulas. The researchers sought out youthful ...

Article: Nebular candles for galactic distances. (nebulae)
Science News;  July 7, 1990 ;     700+ words ... ... surrounding stars. Moreover, the brightest planetary nebulas seem to have roughly the same intrinsic ... galaxies. Comparing the brightest planetary nebulas in distant galaxies with planetary nebulas in a nearby galaxy such as Andromeda ...

Article: A distorted view of the Southern Crab. (nebula visible in a ...
Science News;  January 13, 1990 ;     700+ words ... ... link between symbiotic starts and planetary nebulas -- astronomical entities usually ... light of particular wavelengths. Planetary nebulas result from the ejection of gaseous ... small number of butterfly-shaped planetary nebulas, which may represent just such an ...

Article: Scientists peer into future, at Earth's fiery demise
The Boston Globe;  May 31, 1991 ;     700+ words ... ... details come from recent studies of planetary nebulas -- the rings of debris, appearing ... speed was measured in observation of planetary nebulas by the Hopkins Ultraviolet Telescope ... shapes like the great variety of planetary nebulas astronomers have observed over the ...

Article: The starlet that is loved for its looks.(News)
The Mercury (South Africa);  February 15, 2007 ;     572 words ... ... target for amateur astronomers. It is one of the closest planetary nebulas - a type of nebula formed from gas ejected by a dying sun ... complex even at the smallest scale visible to Spitzer. Most planetary nebulas look diffuse and uniform through telescopes, explained ...

Article: Gerasimovich, Boris Petrovich
Complete Dictionary of Scientific Biography;      700+ words ... ... great value. Gerasimovich was a pioneer in the study of planetary nebulas, which are expanded coulds thrown out at the time of the ... Gerasimovich also studied the processes of ionization of planetary nebulas, determined the luminosity of their nuclei (the central ...

Article: Astronomy: The Stars
The New York Public Library Science Desk Reference;      700+ words ... ... Instability follows, causing stars to become variables, novas, planetary nebulas, or supernovas. At the end of a star's life, it becomes ... very high densities and are usually the central stars of planetary nebulas. The central star in Lyra's Ring Nebula is a hot subdwarf ...