Vinnie Caringella
Astronomy
4-4-2013
Quiz
4-4-13
1.Parallax is an apparent displacement in the apparent position of an object viewed along two different lines of sight.
2.Luminosity
is the total amount of power that a star emits into space.
3.We measure stellar luminosities through the Inverse Square Law for Light.
4. Color, temperature, and spectral type. Spectra of stars show that their surface temperature ranges from more than 40,000 K to less than 3,000 K, responding to the sequence of spectral types of OBAFGKM.
5. A Hertzsprung-Russell diagram plots the surface temperatures of stars against their luminosities.
6.Most stars are main sequence stars, which shine by fusing hydrogen into helium in their cores.
7.A Danish astronomer born in Copenhagen. In 1913 he determined the distances to several Cepheid variable stars.
8. An American astronomer born October 25, 1877. Helped to develop the Hertzsprung-Russell diagram and the Russell-Saunders coupling, also known as LS coupling
9.20 x the mass of the Sun.
10. 0.38"
3.We measure stellar luminosities through the Inverse Square Law for Light.
4. Color, temperature, and spectral type. Spectra of stars show that their surface temperature ranges from more than 40,000 K to less than 3,000 K, responding to the sequence of spectral types of OBAFGKM.
5. A Hertzsprung-Russell diagram plots the surface temperatures of stars against their luminosities.
6.Most stars are main sequence stars, which shine by fusing hydrogen into helium in their cores.
7.A Danish astronomer born in Copenhagen. In 1913 he determined the distances to several Cepheid variable stars.
8. An American astronomer born October 25, 1877. Helped to develop the Hertzsprung-Russell diagram and the Russell-Saunders coupling, also known as LS coupling
9.20 x the mass of the Sun.
10. 0.38"
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