© examsiri.com
Question : 38 of 100
Marks:
+1,
-0
Solution:
- A light-year is a unit of distance. It is the distance that light can travel in one year.
- Light moves at a velocity of about 300,000 kilometers (km) per second.
- So one light-year is equal to kilometers.
- This light-year distance is known as the Astronomical Unit (AU).
- Distances to other parts of the Milky Way Galaxy or even further, astronomers use units of the light-year or the parsec.
- 1 light-year in miles = 5.88 × 1012 miles.
- 1 light-year in Astronomical unit = 63241 au.
- The distance between the sun and earth is 15.54795 × 10-6 light-years.
- Light-Year also helps to determine the age of the celestial body.
© examsiri.com
Go to Question: