2007-04-25 09:20:36 · 19 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
about 300,000 miles per second.
Soz, memorys crap - 300,000 km per second.
2007-04-25 09:23:35 · answer #1 · answered by jeanimus 7 · 0⤊ 2⤋
1 light-year = 9.46*10^15 m
a light year is a measurement of distance not speed or time, however;
speed of light in a vacuum was found experimentally to be
2.99792458*10^8 m/s or roughly about 300 000 km/s
this is about 186300 miles/sec or 670 616 629.4 mph!
2007-04-25 09:48:41 · answer #2 · answered by hec157 3 · 0⤊ 0⤋
A light year is the distance that light travels in a year, not a speed or a length of time.
2007-04-26 00:26:04 · answer #3 · answered by andy muso 6 · 1⤊ 0⤋
Light years are a measure of distance like the meter. The speed of light is aproximately 300000000 meters per second or around 670,616,629.384 miles per hour. So in one 365.25 day year light has traveled 5,879,000,000,000 miles
2007-04-25 09:30:39 · answer #4 · answered by gard_rail 1 · 0⤊ 0⤋
1 light year is about 5.87849981 Ã 10^12 miles
2007-04-25 10:08:30 · answer #5 · answered by Mr. Smith 5 · 0⤊ 0⤋
When you say light years it resembles a distance.
One light year is equal to the distance light travels in a year.
It is used for very long distances such as between galaxies and stars.
2007-04-25 09:24:45 · answer #6 · answered by Maestro bestofthebest 2 · 0⤊ 0⤋
To answer your question, light travels at 669,600,000 mph
2007-04-25 09:31:46 · answer #7 · answered by Anonymous · 0⤊ 0⤋
3719 AU or about 350,000,000,000 miles. Or 350 Billion miles that light travels in one year.
Light travels 186,000 miles every second. So it takes about 494 seconds for sunlight to hit the Earth.
2007-04-25 10:03:50 · answer #8 · answered by chefantwon 4 · 0⤊ 0⤋
A light year is a distance, not a time and not a speed.
It equals about 6 trillion miles.
It is the DISTANCE that a light beam travels in a year.
2007-04-25 09:23:45 · answer #9 · answered by campbelp2002 7 · 4⤊ 0⤋
A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one Julian year.
The length of 1 ly equals 9.460.528.000.000 km (km are used in most countries of Europe).
2007-04-25 09:31:08 · answer #10 · answered by Alfons 4 · 0⤊ 0⤋
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 precisely, one light-year is equal to 9,500,000,000,000 kilometers.
2007-04-25 09:24:27 · answer #11 · answered by AMV8 1 · 1⤊ 0⤋