Stars Vocabulary Practice

A star is a __________________________________.

• celestial ball of burning gas

• an object the same size as Earth

• a solid object in space

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The apparent brightness of an object seen from Earth is called _______________________.

• brightness

• color

• luminosity

• star

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_________________ is used to describe the size of celestial object as seen from Earth.

• luminosity

• a lightyear

• magnitude

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The unit of astronomical distance that equals the distance light travels in on year is known as a ____________________________________.

• magnitude

• brightness

• luminosity

• lightyear

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Which of the following does NOT affect the luminosity of a star?

• size

• type of star

• distance

• your location on Earth

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Compared other stars in the sky, the Sun appears brighter because it is _________.

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The size of a celestial object as seen from Earth is its ________________.

• magnitude

• brightness

• apparent magnitude

• luminosity

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A very bright star can seem dimmer because it is ____________________.

• close

• far away

• blue in color

• smaller

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Match the following pictures to the best definition.

• The size of an object

• 
• distance that light travels in a year

• 
• A celestial ball of burning gas

• 
• The size of an object as seen from Earth

• 

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Using the table, which star is closest to Earth?

• Star 1

• Star 2

• both are the same distance

• not enough info on the table

Answer explanation

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