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Measuring the distance to a planet would probably require the use of what type of measurement?
Wiki User
∙ 12y ago
We can use miles or kilometers to measure both the planets size and their distance from each other and the sun. Their distances from the sun can be hundreds of million km or even billions of km for the outer planets, so it can be useful to use astronomical units instead, where 1 AU (astronomical unit ) is equal to the earth - sun distance.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoThe distance between two planets is measured in kilometers.
Wiki User
∙ 12y agoyou would use miles because 1 mile is more than 1 kilometer
Wiki User
∙ 12y agoIf the distance is found by triangulation, I assume a sextant would be used.
Wiki User
∙ 11y agothey call the presidents of the planets and then time the phone call
Wiki User
∙ 9y agoAU, the astronomical unit, which is the average radius of Earth's orbit.
Wiki User
∙ 13y agoMiles, kilometres or Astronomical Units (AU)
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Why stars distances are measured in light years?
A light-year provides a readily convertible distance that is large enough that vast stellar distances can be expressed in smaller, easily compared numbers. For example, distances to "nearby" stars are from 4 to about 25 light-years, while a galaxy's diameter may be 100,000 light-years or more, and the distances between galaxies are in the millions and billions of light-years.Using kilometers would require larger named numbers or exponents, which could be less clear. Each light-year is about 1.2 trillion kilometers or about 978 billion miles.For shorter distances, a useful unit is the AU, or Astronomical Unit. This is the average distance between the Earth and the Sun, about 93 million miles. If we were measuring or comparing the distances of planets from the sun, they would be expressed in AU's and not light-years. For further distances the light-year is used. It is easier to say 4.2 light-years to Proxima Centauri than 4,125,987,200,000 miles.Another even larger unit, the parsec (parallax second), is based on astronomical angular measurement and is equal to about 3.26 light-years.
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