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A unit that equals the distance light travels through space in one year; a way to measure extremely vast distances; it equals 9.46 trillion kilometers or 9.49 x 1012 km.
Terms in this set (8)
A unit that equals the distance light travels through space in one year; a way to measure extremely vast distances; it equals 9.46 trillion kilometers or 9.49 x 1012 km. Used to measure units outside of our solar system
ASTRONOMICAL UNIT (AU)
a unit used to describe the distance of solar system objects inside our solar system. It is based on the distance from the earth to the EARTH to the SUN.
why is a light year and astronomical unit necessary for measurement.
In the universe, the kilometer is just too small to be useful. The numbers get too large to write and understand so we use bigger units of measurement.
examples of light years as a measurement
earth to another star outside galaxy
sun to another galaxy
distance from our galaxy to the next nearest galaxy
examples of when to use astronomical units
from a planet in our galaxy to the sun, a star, earth
distance from planet to planet
star to a planet, sun, or another star
if an object is 7.4 light years away, what does that tell you
It would take 7.4 years for light to travel through space to that object
If an object is 9.58 astronomical units away from the sun, how would it's distance compare to earths distance from the sun? How do you know?
Earth to the sun is 1 A.U. so the object must be 9.58 times farther from the sun than earth
Explain how exploration of the universe, out galaxy, our solar system, and the planets within it is limited in terms of manned space missions.
if you send a man in space you might not have enough fuel or food, oxygen, and time.
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