Space Facts MCQs with Answers

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The dimension of a light year is [L], as it is a unit of distance (length).

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The brightest star visible in the night sky without a telescope is Sirius, also known as the Dog Star.

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The first molecule ever discovered in space is Helium hydride (HeH⁺).

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Lunar Sea (or lunar mare) refers to a dark plain on the moon formed by ancient volcanic eruptions.

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Parsec is a unit used to measure distance in astronomy, where 1 parsec equals approximately 3.26 light-years.

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MRI and CT scan technologies resulted from the image exploration of the Moon.

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The energy generation in stars is due to fusion of light nuclei (nuclear fusion), where hydrogen nuclei combine to form helium, releasing enormous energy.

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Blue stars are hotter than red and orange stars because they have the highest surface temperatures among stars.

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The Hubble Space Telescope is located outside of the world, orbiting Earth in space at an altitude of about 547 km.

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Interstellar dust and gas absorb and scatter starlight, causing a reduction in the observed brightness of stars—a phenomenon known as interstellar extinction.