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When is it appropriate to use Lys or AUs to measure distances in space?
Wiki User
∙ 9y ago
The idea here is to have "manageable" units - the official international unit of length is the meter, but it's a bit hard to imagine a huge number such as 4e15 meters, (4 x 10 to the power 15) meters, for instance. Astronomical units are typically used within the Solar System; light-years (or parsecs, which are more common in professional astronomy) are typically used outside the Solar System.
Wiki User
∙ 9y ago
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Why are AU and light years important?
I don't think they are "important"; but they are convenient units of length - AU for distances within the Solar System (or other comparable distances); light-years (and parsecs) for larger distances.
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Why do scientists use AUs to measure distances in the solar system?
The AU was used as a unit of measure, before the propagation of electromagnetic radiation was understood, or its rate quantified. So because of tradition, and the fact that the AU is a more wieldy unit, for distances within the solar system than either light years, or miles, the AU still holds sway.
Why are astronomical units necessary?
Because it would be impractical (very large numbers) to use kilometers, miles, or meters to measure distances in our solar system. This unit of measurement is used as it allows for comparisons to be done with relative ease, and all distances can be standardized. For this same reason when talking about anything outside of the solar system, light-years are used as the distances become drastically larger and too much for AUs to handle.
Why do you use aus for distances between the sun and planets and use light years between stars and galaxies?
We like to measure things in convenient numbers, without lining up TOO many zeroes. So we measure the distance from home to work in miles or kilometers, not inches or centimeters. We measure the distance from Earth to the other planets in AU rather than in miles, and we measure the distances to the stars in light years rather than in miles or AU. An even larger unit, the megaparsec, is used to describe the distance to very distant galaxies.
How does distance between earth and sun compare to distance between earth and nearby stars and galaxies?
We measure distances between celestial objects (such as suns, planets, and galaxies) by a unit of measurement called "AU" which stands for, Astronomical Unit. One AU is the equivalent to 93 million miles, which is roughly the distance from earth to the sun. Let's compare that to the next closest star to us, Alpha Centauri, which is 4.4 light years away, or about 271,930 AUs! Distances are Immense.
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Aus means from.
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The German word for "out" is "aus".aus
What does the german word aus mean?
"Aus" means "Out".
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Aus Liebe was created in 2006.
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Gunvald Aus was born in 1851.
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Gunvald Aus died in 1950.
