GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Time
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Energy
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Pressure
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Astronomical distance
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Detailed explanation-1: -The parsec is a unit of length used to measure vast distances between astronomical objects outside the Solar System. It is roughly equivalent to. light-years or astronomical units, or. trillion kilometers.
Detailed explanation-2: -The astronomical unit (symbol: au, or AU or AU) is a unit of length, roughly the distance from Earth to the Sun and approximately equal to 150 million kilometres (93 million miles) or 8.3 light-minutes.
Detailed explanation-3: -Bottom line: One parsec is defined as the distance to a star that shifts by one arcsecond from one side of Earth’s orbit to the other. One parsec is about 30 trillion kilometers, or just over three light-years.
Detailed explanation-4: -A parsec is a distance at which one astronomical unit subtends an angle of one second of arc, and the Astronomical unit measures the distance between the earth and the sun. A light-year is also related to astronomy and parsec.
Detailed explanation-5: -Hence, one parsec corresponds to 648, 000 astronomical units. light years and astronomical units are approximately equal to 8 light minutes.