PAGE NO. ОИЗО АЯ DATE: STAO Astronomical unit, light yea y explain them and woite their uses what is acceleration 2. How can we calculate it2.
Answers
Explanation:
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The light-year, alternatively spelled lightyear, is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometres (9.46×1012 km) or 5.88 trillion miles (5.88×1012 mi).[note 1] As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).[2] Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time.[3]
Light-year
12lightyears.gif
Map showing the stars that lie within 12.5 light-years of the Sun[1]
General information
Unit system
astronomy units
Unit of
length
Symbol
ly[2]
Conversions
1 ly[2] in ...
... is equal to ...
metric (SI) units
9.4607×1015 m
9.46075 Pm
imperial & US units
5.8786×1012 mi
astronomical units
63241 au
0.3066 pc
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