6 billion light years is the distance that light travels in 6 billion years. The speed of light is equal to 300,000 kilometers per second, 1 year is equal to 365 days, one day is equal to 24 hours, and 1 hour is equal to 3600 seconds. 6 billion light years equals 60 * 300,000 *365*34*3600 equals 5.676* 10 to the 22nd power kilometer. So 6 billion light. It is equal to the 22nd power kilometer of 5.676* 10, and 6 billion light years can't be compared with the year.
The concept of 1 light year
Generally speaking, a light year is the distance that light travels in a straight line in a vacuum for one year. It is a unit of length and is usually used to calculate the distance between stars. Let's compare, China's high-speed rail construction is world-famous. The total length of high-speed rail ranks first in the world, about 2.5× 10∧7 meters, and the distance of one light year is equivalent to 3.78× 10∧8 high-speed rails.
If compared with the earth itself, the circumference of the earth is 4× 10∧7 meters, and the distance of one light year is equivalent to 2.365× 10∧8 earth circumferences. These are still too small. The distance between the earth and the sun is 65.438+0.2 billion kilometers, and a light year is 63,000 times.
The original intention of the concept of light-year is to be used as the astronomical distance unit, which means that light-year is the basic unit, and its function is basically the same as that of the rice we use on the earth (actually smaller).
The nearest star in the solar system is proxima centauri, which is about 4.20 light years away. In other words, if we fly at the speed of light to visit our nearest neighbor, it will take four years.