Definitions for

**"Light year"****Related Terms:**Light-year, Parsec, Arc second, Arcsecond, Minute, Arc minute, Nautical mile, Knot, Knots, Megaparsec, Tachymeter, Inverse square law, Kiloparsec, Speed of light, Mile, Wind speed, Proper motion, Astronomical unit, Radiance , Footcandle, Telemeter, Km/h, Lux , Foot candle, Second, Luminosity, Sextant, League, Arcminute, Speed , Moa, Degree, Kilometer, Minute of angle, Illuminance, Statute mile, Hour angle, Foot-candle, Octant, Lambert, Latitude, Velocity, Angular distance, Polarimeter, Lumen, Right ascension, Standard candle, Wave velocity, Longitude

The distance over which light can travel in a year's time in a vacuum, 5.88 trillion miles (9.46 trillion kilometers); -- used as a unit in expressing stellar distances. It is more than 63,000 times as great as the distance from the earth to the sun. The star nearest to the earth's sun is about 4 light years distant.

a very large difference; -- used figuratively to express great differences (of distance, quality, time) in comparisons.

distance traveled by light in a vacuum in one year: 1 light year = 9.46(10' 55 m.

The distance that light travels in a vacuum in 1 year, equal to 5.88 trillion miles or 9.46 trillion kilometres.

Astronomical unit that measured the distance that light can travel in a year.

The distance which a ray of light would travel in one year. This is about 6,000,000,000,000 (6 trillion) miles.

a unit of length used in astronomy equal to the distance that light can travel in a year (about 10 trillion kilometers or 6 trillion miles). (See also text in ExtraGal.)

A light year is how far light travels in a year. Since light travels at about 300,000 km per second, in a year it travels 9,460,000,000,000 kilometres, or 5,865,696,000,000 miles

Distance that light travels in the vacuum of space in one year. Approximately 9.7 trillion kilometers.

The distance traveled by light in one year, equal to 186,000 miles per second.

The distance traversed by light in one mean solar year, about 5.88 trillion miles (9.46 trillion kilometers): used as a unit in measuring stellar distances.

The distance light travels in 1 year (6.0 x 1012 miles).

a distance, how far light travels in one year

a distance not a time

a Earth year as explaned later

a measurement of DISTANCE

a measure of distance equal to the distance light can travel in a year

a popular unit of astronomical distances, equal to the distance light travels in a year

a way of measuring distance

The distance light travels in a year: about 9,460,000 million kilometres or 9.46 x 1015 m. (Light travels at 300 000 kilometres a second.) 1 parsec = 3.26 light years.

The distance light travels in a year (9.5 million million kilometers, or 5.9 million million miles).

Distance that light travels in one year. It is not a measure of time.

The distance travelled by light in one year. 9.4607 × 10 12 km or 63,240 AU or 0.3066 parsecs.

The distance traveled by light in one year, about 1 0 trillion kilometers.

The distance traveled by light in one year. This is roughly 1013 kilometers, or 6 × 1012 miles.

(abbreviation ly) The Light Year is defined as the distance travelled by light (or any other electro-magnetic wave) in a year in a vacuum. Since the speed is 3·00×108 m/s; and 1 year = 365 × 24 × 60 × 60 seconds = 3.15×107s; it follows that a light year is: 3·00×108 × 3.15×107 = 9.46×1015 m.

The distance travelled by light in one year. 9.4607x 1012 km or 63,240 AU or 0.3066 parsecs.

(ly) The distance light travels in a year. It is equal to 0.3066 parsecs. It is 9461 billion km or 63 240 astronomical units.

The Distance light travels in one year while traveling at 186,000 miles per second or 300,000 Kilometers (Clicks) per second.--- 5,880,000,000,000 miles or ten trillion Kilometers

The distance light travels in one year, approximately 9.46 trillion km (5.88 trillion miles).

The distance travelled by a beam of light in the vacuum in one year. It is approximately 10 million million km.

ly) a unit of measurement often used for interstellar or intergalactic distances; the distance light travels in a vacuum during a year; approximately equal to 6 × 1012 miles

The distance travelled by light in one year, equal to 9.4607E12 km (5.88 * 10E12 miles or 63,240 AU).

the distance that light travels in one year.

Despite its odd name, a light year is a measure of distance, not time. It actually designates the distance that light can travel in one year, which equals 9,460,000,000,000 km.

a measure of distance, not time. Defined as the distance light travels in one year. Roughly equal to 5.88 trillion miles (5,880,000,000,000 miles). This unit of linear measurement is used for stating interstellar distances. For example, Proxima Centauri is 4.2 light years from our solar system.

Light year (ly) is a unit of distance used in astronomy, defined as the distance light travels in one year in a vacuum (ly = 9.46052973âˆ™1015).

A unit of distance, a light year is the distance light travels in one year. When we look at an object 100 light years away, the light we are seeing is 100 years old, and we are seeing what the object looked like 100 years ago.

This is the distance light travels in space (technically in a pure vacuum) in one year's time.

The distance light can travel in one year (abbr. ly), equal to 9.46073047 Ã— 1012 km (5.87862537 Ã— 1012 miles). [ edit][ edit

An astronomical unit of measure equal to the distance light travels in a year, approximately 5.8 trillion miles.

The distance light travels in a vacuum in one year (about 9.5 trillion km/6 trillion miles.)

A light year is the distance that light can travel in one year. Light speeds along at 186,000 miles per second (300,000 km/s)! At that rate, light will travel almost 6 trillion miles (9.5 trillion km) in a year. That means that when you look at a star that is, say, 100 light years away, you're seeing the light that star gave off 100 years ago. That's what astronomers mean when they talk about "looking back in time". Oh, and by the way, the nearest star, Alpha Centauri, is 4.35 light years away.

The distance light travels in a vacuum in one year; 1 LY = 9.46 x 10^12 km, or about 6 x 10^12 Mi.

A measure of distance defined as the distance light, traveling at the speed of 299,792,458 metres per second, travels in one year, 9.46 trillion kilometres. Because interstellar distances are so vast, a much larger measuring stick is required.

the distance travelled by light in one year, that is 9,460 billion Km.

A measure of the distance light travels in one year; equal to about 9.5 x 1012 kilometers, or 5.9 x 1012 miles.

The distance light travels in a year, at the rate of 300,000 kilometers per second (671 million miles per hour); 1 light-year is equivalent to 9.46053e12 km, 5,880,000,000,000 miles or 63,240 AU.

distance light travels in one year (9.461 trillion kilometers, over 63,000 A.U.!). Used for inter stellar distances.

The distance light travels in one year. A light year is 9.5 trillion kilometers

The distance light travels in 1 year (approximately 9.5 million million kilometres).

The distance light travels in one year, which is approximately 9.46 x 1015 meters.

Distance that light travels in one year (p. 90, 92). Much longer than a crawling second or a subway minute (p. 88, 102-103).

The distance light travels in one year (approximately 5.9 trillion miles or 9.5 trillion kilometers).

A measure of distance - the distance light travels in one year at 671 mph - 9.5 million million km (US trillion) or 63,240 AU.

**Keywords:**magnitude

Magnitude

a unit of time