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Q: Why is light year preferable to use than kilometre when expressing the distance of star?
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What is the relation between a light year and kilometre?

They both are a type of Distance.


How many kilometers in one lightyear per hour?

A light year is the distance that light will travel in a vacuum in a year. Nothing can travel that distance in an hour so a lightyear per hour is a meaningless concept of speed. Though impossible to attain, it is a measure of speed while a kilometre is a measure of distance. There is no direct relationship between the two.


How far in km does light travel in one hour?

1,079,252,850 km or in other words a very very long way


What basic unit is used to measure distance?

Light year, kilometre, metre, centimetre, millimetre, micrometre, nanometre. And for the old fashioned, light year, mile, furlong, chain, yard, foot, inch, thou. Both systems contain many other units that are used less often.


How far is 4.22 light-years in kilometre?

Each light-year is about 9.5 x 1012 kilometers, so you can multiply by that number.


How is a light year used?

Because to say a star is 4.3 light-year away easier than saying it's 40,680,000,000,000 kilometers away. Granted you could say it's 40.68 trillion kilometres but that method never really caught on. --- Expressing the conventional units for distance in light-year does not only provide a clear grasp of the idea of the distance that is long long way away, but it is also more convenient when you express the quantity in writing.


What are light-minutes in science?

A light-minute is a measure of distance. It is the distance light travels in one minute's time. One light-minute is a distance of about 11,176,943.82 miles.


Is the sun measured in light years?

'Light-year' is a unit of a distance. It is the distance for light to travel one year. So it is a great distance.


The light travels from Alpha Centauri to Earth in?

The distance has been generally presented in Light-years, which is the distance light travels in one-year. The distance to Alpha Centari is 4.7 light-years (alpha Centari is 4.3 light-years distance).


What is the distance travelled by light in one day?

1 light day is a distance.


What is the distance for a light-year?

A light year is the distance light travels in one year and is a measure of distance or length. It equates to about 5.9 trillion miles.


How many second in a light year?

A light year is a measure of distance, not time. A light year is the distance that light will travel in one year. One light second is 186,000 miles. A light year is a measure of distance, not time. A light year is the distance that light will travel in one year. One light second is 186,000 miles.