The ConstellationsExplains the history, mythology, and science that make up the discipline of astronomy. Every constellation, from Andromeda to Virgo, is discussed and every important star, from Betelgeuse to Sirius, is explored. |
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Page 35
Lloyd Motz, Carol Nathanson. Spectroscopic Binaries The spectroscope , an instrument developed to analyze light , is a fundamental astro- nomical tool that has played an extremely useful role in the detection of those binary stars whose ...
Lloyd Motz, Carol Nathanson. Spectroscopic Binaries The spectroscope , an instrument developed to analyze light , is a fundamental astro- nomical tool that has played an extremely useful role in the detection of those binary stars whose ...
Page 150
... spectroscopic binary , with a period of less than three days . The two A stars , virtually in contact at only 4 million miles ' separation ( their duality thus not resolvable in any telescope ) , are both class - A main - sequence stars ...
... spectroscopic binary , with a period of less than three days . The two A stars , virtually in contact at only 4 million miles ' separation ( their duality thus not resolvable in any telescope ) , are both class - A main - sequence stars ...
Page 328
... spectroscopic binary , λ's peculiar spectrum shows bright emission lines of calcium . Its slight variability ( m 3.7-4.1 ) is unrelated to the revolutionary period of the extremely close components , about 2012 days . Some 7 degrees ...
... spectroscopic binary , λ's peculiar spectrum shows bright emission lines of calcium . Its slight variability ( m 3.7-4.1 ) is unrelated to the revolutionary period of the extremely close components , about 2012 days . Some 7 degrees ...
Contents
ONE Two Bears and a Dragon | 3 |
TWO Ursa Major and Ursa Minor | 25 |
THREE | 56 |
Copyright | |
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Common terms and phrases
absolute magnitude ALPHA ancient Andromeda apparent magnitude Arabic astronomical units BETA Betelgeuse blue-white bright brightest star called celestial Cepheids clouds companion components constellation Cygni degrees northwest degrees south diameter Dipper discovered double Earth east eclipsing elliptical emission EPSILON faint fainter fifth-magnitude fourth-magnitude galactic GAMMA gaseous globular cluster Greek Hale Observatories heavens helium Hercules Herschel hydrogen indicates interstellar ionized known lies light years distant luminosity luminous lying Lyrae main sequence main-sequence star Majoris miles per second Milky million miles naked-eye nebula northeast novae object observed open cluster optical optical companion orbit Orion parsecs period Perseus Photographed planetary primary proper motion RA 12 h radiation radio red giant Rigel rotation shell Sirius small telescope solar southeast southern southwest spectral class spectral lines spectral type spectroscopic binary spectrum spiral galaxy star's stellar subgiant Sun's supergiant supernova temperature Ursa Major variable velocity visible Zeta