# GENERAL KNOWLEDGE

## GK

### THE UNIVERSE

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The light of Proxima Centaury takes 4.3 years to reach Earth. What does it mean?
 A The star is 4.3 miles from Earth B The star is 4.3 light years from the Earth C The star is 43.000.0000.000. light years fromm the Earth D The star is 4.3 km from the Earth
Explanation:

Detailed explanation-1: -Proxima Centauri: It is the nearest star from the earth. It is 4.3 light-years from the earth. It means light takes 4.3 years to reach earth from Proxima Centauri. As we know one light-year is the distance that is traveled by the light in one year.

Detailed explanation-2: -Light-year is a large unit and equals the distance travelled by light in one year. Hence, the large distances are expressed in light-years. If a star is located 8 light-years away from the earth, it means that the distance between the star and the earth is the distance light would travel in eight years.

Detailed explanation-3: -The next closest star to us is about 4.3 light-years away. So, when we see this star today, we’re actually seeing it as it was 4.3 years ago. All of the other stars we can see with our eyes are farther, some even thousands of light-years away.

There is 1 question to complete.