Question

In terms of light-years, how far is Jupiter away from the sun?

Answer 1

Hint: Light travels very fast. The speed of light is $3 \times {10^8}m/s$ . A light-year is a unit to measure the length/distance. This unit is being used in astronomy. Because in astronomy the problems include very long distances. A light-year is distance travel by light in a year equivalent to 9.46 trillion kilometers. The distance from Earth to the sun is called an astronomical unit, or AU, which is used to measure distances throughout the solar system. Jupiter, for example, is 5.2 AU from the sun.

Complete solution:
Planets are far closer to Earth than distant galaxies, so seeing a planet through a telescope or in a photo is not such a distant view into the past. It’s common to measure planet distances from the sun in light minutes or light hours as opposed to light-years since those numbers are smaller and easier to comprehend. For instance, Mercury is the closest planet to the sun. On average, it is about 36 million miles away. In light-years, that number would be 0.000006123880620837039 light-years away. It’s much easier to say that it is about 3.3 light minutes away, meaning it would take about 3.3 minutes for light to travel between Mercury and the sun.
The light takes 43 minutes from the sun to Jupiter. It means we can say that the distance between the sun and Jupiter is 43 light minutes. Similarly, we can calculate the same in light-years, that is, 0.00008233217279125351 light-years.

Note: The unit light-years should not be confused as a unit of time. Since it includes the word years which is a measure of time therefore it may be confusing. Light seconds, light minutes, and light-years, etc. all are the unit of distance. For example, we can say that the distance between the earth and the sun is about 8 light minutes because the light takes around 8 minutes 22 seconds to reach the earth from the sun.