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X-ray astronomy

(Encyclopedia)X-ray astronomy, study of celestial objects by means of the X rays they emit, in the wavelength range from 0.01 to 10 nanometers. X-ray astronomy dates to 1949 with the discovery that the sun emits X ...

Cassiopeia, in Greek mythology

(Encyclopedia)Cassiopeia kăsˌēəpēˈə [key], in Greek mythology: see Andromeda. ...

In

(Encyclopedia)In, symbol for the element indium. ...

red shift

(Encyclopedia)red shift or redshift, in astronomy, the systematic displacement of individual lines in the spectrum of a celestial object toward the red, or longer wavelength, end of the visible spectrum. The effect...

Cesari, Giuseppe

(Encyclopedia)Cesari, Giuseppe, called Cavaliere d'Arpino jo͞ozĕpˈpā chāˈzärē kävälyāˈrā därpēˈnō [key], 1568–1640, Italian late mannerist painter. Cesari's outstanding works are the frescoes in ...

National Radio Astronomy Observatory

(Encyclopedia)National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...

Nuffield Radio Astronomy Laboratories

(Encyclopedia)Nuffield Radio Astronomy Laboratories: see Jodrell Bank Observatory. ...

Messier catalog

(Encyclopedia)Messier catalog mĕsyāˈ [key], systematic list of nebulae and star clusters. A first list, compiled and published in 1771 by Charles Messier, contained 45 objects. The final list, published in 1784,...

galaxy

(Encyclopedia)CE5 Hubble classification of galaxies: Elliptical galaxies (E) are classified according to the degree of flattening of the ellipse. Spiral galaxies (S) and barred spiral galaxies (SB) are classifie...

Young, Charles Augustus

(Encyclopedia)Young, Charles Augustus, 1834–1908, American astronomer, b. Hanover, N.H., grad. Dartmouth, 1853. He discovered the reversing layer of the solar atmosphere and proved the gaseous nature of the sun's...