Scientists often measure length in?

Answer 1

depends what they're measuring. Centimeters, milimetes, kilometers... anything in the metric system. They don't use inches, miles, etc. because they just don't make sense! The metric system is based on increments of 10, so everything is neat and easily organized and calculated.

Answer 2

For everyday use, the metric system! The basic unit is the metre.
The metre is slightly long than the yard, about 39 inches.
The beauty of the metric system is that it's based on 10.
In other words, all units work the same as our number system.
And that's good, because we were born with 10 fingers.
In space & astronomy, the metric system is too small.
Distances in our solar system are compared to our orbit around the sun. Distances in the universe are measured in light-years. The distance light travels in an earth year.

Answer 3

They consistently use the metric system. Although, since your question is in "astronomy and space", the distances in the solar system are measured by "astronomical units (AU)". One AU is defined as the average distance between the Earth and the sun, about 150,000,000 km (93,000,000 miles). Beyond that they generally use light years, which is the distance that light travels in a year, about 6,000,0000,000,000 miles!

Don't use "garyomega's" information, he seems to be quite a bit off his conversion of AU to miles.

Additional fyi...If this is a question from a text book, the correct answer might be "SI unit of measurement", which is another name for the metric system.

Answer 4

Not just often, scientists around the world always use the metric system for measurement. Except for astronomical distances when they use either the lightyear or the parsec.

Answer 5

Scientists use the metric system for ordinary measurements (..meter, centimeter, kilometer, etc.,.) Astronomers use 'light years' to measure the huge distances they often have to deal with. One light year is how far light travels in one year's time.

Answer 6

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Answer 7

A.U.'s or Astronomical Units. I AU is 356 million miles, the distance from the center of the earth to the center of the sun. There are others too, like Light Years, which is the distance covered by a photon in a year moving at 186,000 miles per second.

Answer 8

Units of the metric system for earth bound objects, light years or astronomical units for space based things.

Answer 9

Meters

Answer 10

Length is measured in furlongs; time is measured in fortnights. Hence the famous "furlong per fortnight" system of units.