it can be difficult to comprehend just how big galaxies are. while the sun or moon may feel far away from us…

it can be difficult to comprehend just how big galaxies are. while the sun or moon may feel far away from us on earth, we are much farther away from other astronomical bodies in the milky way. to measure such large distances, scientists use a unit called light - years. one light - year is the distance light travels in one year, which is about six trillion miles! the nearest star to the sun, proxima centauri, is about 4 light - years away. the entire milky way galaxy is about 100,000 light - years across! approximately how long does it take light from proxima centauri to reach earth? 1 year 4 years 100 years 100,000 years

it can be difficult to comprehend just how big galaxies are. while the sun or moon may feel far away from us on earth, we are much farther away from other astronomical bodies in the milky way. to measure such large distances, scientists use a unit called light - years. one light - year is the distance light travels in one year, which is about six trillion miles! the nearest star to the sun, proxima centauri, is about 4 light - years away. the entire milky way galaxy is about 100,000 light - years across! approximately how long does it take light from proxima centauri to reach earth? 1 year 4 years 100 years 100,000 years

Answer

Explanation:

Step1: Recall light - year definition

A light - year is the distance light travels in one year.

Step2: Identify Proxima Centauri distance

Proxima Centauri is about 4 light - years away from the Sun (and Earth relatively). This means it takes light from Proxima Centauri 4 years to reach Earth.

Answer:

4 years