A light year is a unit used to calculate , and a light year is about trillion kilometers

Light-years, a unit of length, refers to the distance that light travels in a year, which is about 9,460 billion kilometers (or 5,880 billion miles). A more formal definition is the distance traveled by a photon in free space and at infinity from any gravitational or magnetic field in a Julian year (i.e., day, and each day is equal to 86,400 seconds).

Because the speed of light in a vacuum is 299,792,458 meters per second (exact), one light-year is equal to 9,460,730,472,580,800 meters (exact), or approximately equal to meters = petameters.

Light-years are generally used to measure large distances, such as the distance of the solar system from another star. A light-year is not a unit of time. In astronomy, the parsec is a very common unit, and one parsec is equal to a light-year.

One light-year is also equal to 63,240 astronomical units.

Rounding to the nearest 4 is 9,460.8 billion kilometers in a light-year (the speed of light in a vacuum is constant at about 300,000 kilometers per second).

Calculate the equation: one light year = 365x24x60x60x30w

A light-year is a unit used to calculate (distance), and one light-year is about (trillions of kilometers.

The distance traveled by light in one year is called "one light year".One light-year is about 500 million light-years away from humans.

A more formal definition is the distance traveled by a photon in free space and at an infinite distance from any gravitational or magnetic field in a Julian year[1] (a day, and a day is equal to 86,400 seconds, or a year is 31557600 seconds). Since the speed of light in a vacuum is 299,792,458 meters per second (to be exact), one light-year is equal to 9,460,730,472,580,800 meters, or 5,878,897,915 miles, or 5,108,794,455 nautical miles, or about 10 15 meters = patameters.

Note: 1 km (km) = miles = nautical miles; 1 Julian year = 31557600 seconds. ）

Using 10,000 kilometers as a unit is 946073047 10,000 kilometers...

Light-year return potato dates are one-handed destruction of distance.

The speed of light is 299792458 meters per second.

1 light year m.

A light year is a unit of length, which refers to the distance between the limbs that light travels in a straight line in a vacuum, and is a unit used in astronomy to measure the distance between celestial bodies, 1 light year is 9460730472580800 meters, calculated as distance = speed time, the speed of light is 300,000 kilometers per second (299792458 meters) 1 year (315536000 seconds).

Lightyears are often mistaken for "years", but they are fundamentally different, with a light-year being a unit of length and a year being a unit of time. The light-year unit was first officially used in 1838 by Friedrich Wilhelm Bessel, a German astronomical scholar.

The original intention of this concept is because the distance between celestial bodies is too far, even if it is very troublesome to use the largest distance unit in daily life, "kilometer", and the following numbers may reach ten, so scientists began to use the special unit of counting light years after calculating the speed of light in 1728.

If the rocket speed is 10 kilometers per second, then it will take about 30,000 years to fly 1 light year. Because the speed of light is about 300,000 kilometers, which is equivalent to 30,000 times the speed of a rocket, that is, 30,000 times that of one year, that is, 30,000 years.

In addition, there are other modes of transportation, which can also make you feel how far away the light year is, if we put aside all the physiological needs, do not drink water, do not eat, do not sleep, and keep walking, it will take about 100 million years, and the world's fastest vehicle, Explorer 2, can reach kilometers per second, and it will take about 4,000 years to complete 1 light year.

One light-year equals: copy.

A light-year is a unit of length that is used to measure the amount of light in the universe.

The DAO distance of a year propagated in a straight line in a vacuum is generally used to measure the space-time distance between celestial bodies, which literally refers to the distance traveled by light in a straight line for a year in a cosmic vacuum.

A light-year is a unit in which time and the speed of light are calculated. Distance = speed of time, the speed of light is about 300,000 kilometers per second (299,792,458 meters per second), and 1 light year is 9,460,730,472,580,800 meters. Reads as:

9,460,777,588,800 meters.

Light-years, a unit of length, refers to the distance that light travels in a year, which is about 9,460 billion kilometers.

One light year = 9,460,000,000,000,000,000 meters.

One light year = 9,460,000,000,000 km = km.

It is often used by science fiction writers.

A unit of distance occasionally used by astronomers. One light-year is equal to the distance traveled by light traveling at a rate of 299 792 458 meters per second in a year – that is, x 10 12 kilometers (trillion kilometers), or parsecs. A light-year is a unit of distance rather than time.

The light moon, the light day, the light hour, the light minute, and the light second are all derived in a similar way from the distance that light travels in the corresponding time interval.

Light-years are generally used to measure a large distance, such as the distance between the Sun and another star. "Year" is a unit of time, but "light year" is not a unit of time, but a unit of astronomy that measures the distance between time and space of celestial bodies. In astronomy, the parsec is another commonly used unit of distance, 1 parsec = light year.

The distances between celestial bodies in the universe are so large that it is much easier to measure in light-years if it is very cumbersome to calculate in kilometers, the most common. The distance traveled by light in a year in a vacuum is called a light-year. The speed of light in a vacuum is about 300,000 kilometers per second, or 3,108 meters per second (the length of the Julian year is about equal to the day, and the date of January 1, 2000 (recorded as the standard epoch) is a meter.

A light-year is a unit of length used to measure the distance of light traveling in a straight line for a year in a cosmic vacuum, and is generally used to measure the space-time distance between celestial bodies.

The speed of light is about 300,000 kilometers per second, which is actually 299792458 meters per second, and multiply this value by one year to get the speed of light.

24 hours a day, 365 days a year, 60 minutes per hour, 60 seconds per minute, and light travels about 300,000 kilometers per second, and all of this is multiplied to get 94608000000000 kilometers, which is 9460800000000 kilometers.

The Sun is 43 trillion kilometers away from its nearest star, the constellation Centauri, and the farthest star ever observed by man is more than 3 billion times that number. In this case, it is much easier to use light years, the distance from the Sun to Centauri is light years, the distance from the brightest star Sirius, the distance from Cowherd and Vega is light years, and the distance from Betelgeuse is 850 light years, and the Milky Way spans 100,000 light years.

At present, the farthest star detected by mankind has reached 15 billion light-years away from the Earth - humans observed this light 15 billion years ago (the time of the universe is constant, and it cannot be said that because it is 15 billion light-years away from us, it is said that we saw the universe 15 billion years ago**).

Also, for convenience, scientists define the average distance from the Earth to the Sun as "1 astronomical unit". It is much more convenient to use this unit to measure the distance of the solar system. The distance between the Sun and the Earth is 1 AU, the AU from Mercury, the AU from Venus, and 40 AU from Pluto.

Light-years are distance sheets.

bits, 1 light-year = 9460730472581 kilometers, which can be simply denoted as 1 light-year = trillion kilometers.

A light year is a unit of distance used in astronomy, symbolized, and is mainly used to measure the distance of objects outside our solar system. 1 light-year refers to the distance traveled by light in a year in a vacuum.

The closest star to the Sun (Proxima Centauri) is light-years away from the Sun. The Milky Way is about 100,000 light-years in diameter. The depth of the universe has been observed by humans to reach 15 billion light-years.

And one light year is exactly the distance of the sun to the earth, light travels at a speed of 300,000 kilometers per second, and it reaches the earth exactly one year

It is the length, the unit, which generally represents the earth, the diameter.

Light-years are the unit of distance.

One light-year equals trillions of kilometers.

A light-year is a unit of length, and 1 light-year is equal to 15 to the power of meters.

A light-year is a unit of length, and 1 light-year is equal to a meter.