kilometers but you would have to be an astronote to do that
meters, feet, and even miles are way too small to measure distances in space. astronomical units are mostly used to measure distances in our solar system. light years are used to measure the distances of things further away from our solar system.
Today we had to turn our projects in about the 3d solar system.
You can use kilometers if you like. On the other hand, distances within the Solar System are often quoted in AU (astronomical units), where 1 astronomical unit is the distance from Sun to Earth. Such distances are easier to visualize.
Objects in the solar system are much smaller than a light year. Light takes only minutes or hours to pass from one planet to another. To measure interplanetary distances in light years would be like measuring the sizes of insects in miles. Usually, though, rather than light hours and light minutes, distances in the solar system are measured in Astronomical Units (AU), which is average distance between Earth and the sun, about eight light minutes.
The planet Saturn is one of many gas giants in our solar system.
cm
ASTROLABE
METERS!!!The unit of measurement you would use to measure the width of your classroom is meters.
For the same reason you wouldn't use a ruler to measure a paramecium. A lightyear is the distance that light travels in a year, about 6,000,000,000,000 miles. The reason it isn't used inside of our solar system is, simply, because the solar system isn't that big.
centimeter?
Centimetre.
Parsecs
meters, feet, and even miles are way too small to measure distances in space. astronomical units are mostly used to measure distances in our solar system. light years are used to measure the distances of things further away from our solar system.
A tape measure.
If you don't have enough other information about the triangle to allow you to calculate the width, then you have to use a ruler or a tape measure.
a ruler
inches