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The strongest lines present in spectral class A stars are ab…

The strongest lines present in spectral class A stars are absorption lines of __________ .

Published August 13, 2024
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White dwarfs like Sirius B are typically the size of _______…

White dwarfs like Sirius B are typically the size of __________ .

Published August 13, 2024
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The vast majority of stars near us in space would fall to th…

The vast majority of stars near us in space would fall to the bottom right on the H-R diagram.

Published August 13, 2024
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At its brightest, Venus, at magnitude -4, is 100 times brigh…

At its brightest, Venus, at magnitude -4, is 100 times brighter than a 1st magnitude star.

Published August 13, 2024
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If Vega is apparent magnitude zero, and Deneb first magnitud…

If Vega is apparent magnitude zero, and Deneb first magnitude, then:

Published August 13, 2024
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A star’s absolute magnitude is its apparent brightness as se…

A star’s absolute magnitude is its apparent brightness as seen from:

Published August 13, 2024
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Main sequence stars are fusing hydrogen into helium in their…

Main sequence stars are fusing hydrogen into helium in their cores.

Published August 13, 2024
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A star’s color index is a quick way of determining its

A star’s color index is a quick way of determining its

Published August 13, 2024
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The absolute magnitude scale is defined so that a difference…

The absolute magnitude scale is defined so that a difference of five magnitudes is a luminosity difference of ___________.

Published August 13, 2024
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A star is 10 parsecs from Earth.  Which statement is true?

A star is 10 parsecs from Earth.  Which statement is true?

Published August 13, 2024
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