one light year is approximately equal to how much?
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Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers.
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Multiply the number of seconds in one year by the number of miles or kilometers that light travels in one second, and there you have it: one light-year. It's about 5.88 trillion miles (9.5 trillion km).
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A relatively close 34 light-years away, Pollux is just under two times the mass of our sun, almost nine times the diameter of the sun, and about 30 times the sun's brightness in visible light.
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It is about 4.22 light-years from Earth and is the closest star other than the sun. Alpha Centauri A and B orbit a common center of gravity every 80 years. The average distance between them is about 23 astronomical units (AU) — a little more than the distance between the sun and Uranus.
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Astronomers determine the brightness of stars in terms of absolute and apparent magnitude scales. Apparent magnitude measures the brightness of the star observed from any point, whereas absolute magnitude measures the brightness of the star observed from a standard distance away, which is 32.58 light years.
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The sun has a mass of 1.9891x1030 kg = 4.384x1030 lb = 2.192x1027 tons, or a mass 333,000 times that of the Earth. The radius of the Sun is 696,265,000 meters = 696,265 km = 432,639 mi or a radius 109 times that of the Earth. The volume of the Sun is so huge that it could hold over 1 million Earths.
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1 pc = 3.26 ly To link to this length or distance - parsec to light years units converter, only cut and paste the following code into your html.
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Bottom line: One parsec is defined as the distance to a star that shifts by one arcsecond from one side of Earth's orbit to the other. One parsec is about 30 trillion kilometers, or just over three light-years.
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So if we could travel at the speed of light, it would take 736 years to get there, but at our current fastest rate of space travel, it would take around 18,000 years for each light year, so it would take around 13 million years to reach the nearest star of Orion's Belt.
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Astronomers define star brightness in terms of apparent magnitude — how bright the star appears from Earth — and absolute magnitude — how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.
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Jupiter: 0.00008233217279125351 light years, or about 43 light minutes away from the sun.
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A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km.
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Earth completes one revolution of Sun in 365/366 days, and we take it as 1 year, but other objects in space, have more longer/shorter orbit than that of Earth. So there, 1 year could be shorter or longer than Earth.
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A light year is the distance light travels in a year. ... One light year is almost six trillion miles. And an astronomical unit is the average distance between the earth and the sun. So the distance to the sun is by definition one AU.
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He did this by relating the light-year to the astronomical unit – the Earth-sun distance. One astronomical unit, or AU, equals about 93 million miles (150 million km).
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The size of the sun is an equivalent to 1 solar radius. If a star's size is 0.1 solar radius, the sun is 10 times larger than the other star.
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However, assuming that it is there, it is located 4.37 light-years from Earth. So traveling at light speed, it would only take a little more than 4 years to get there.