A light year is the distance that light can travel in a year.
5,865,696,000,000 miles or 9,460,800,000,000 kilometres
This can be worked out because we know how far light travels in a second (186,000 miles per second / 300,000kilometers per second), we can therefore use simple maths to work out the answer.
186,000 miles/second x 60 seconds/minute x 60 minutes/hour x 24 hours/day x 365 days/year = 5,865,696,000,000 miles/year.
A parsec is longer than a light year.
1 Parsec = 3.26163626 light years
One light year (the distance light travels in one year) is 5.878625373e+12 miles
A terameter is many times smaller than a light year. It is about 621,371,192 miles. This is a great distance but is only 0.000105702341 light years.
Two light years.
Parsec = 3.26156378
Never - its not alive. But it has existed for many billions of years, almost 13.
well it depends on what you are measuring your 'much' in. First thing is, a light year is a distance not a time. It is defined as the distance light would travel in the time of one human year. Now to define this: light travels at ~300000000ms-1 and there are 31536000s in one year, so light will travel: 300000000*31536000 = 9.5x1015 metres in one year (that is 95 followed by 14 zeros! so a long distance) so in 9.7 light years light will travel 9.2x1016 metres. Which is a very very long distance.
About 4.2 light years
One meter is about 0.000,000,000,000,000,105,7 light-years.Calculation: As a light-year is 9,460,730,472,580,800 meters, one meter equals 1/9,460,528,400,000,000 light-years = 1.057,000,834,024,615,4 × 10-16 light-years - or about 105.7 atto-light-years.
The sun is not light years away but light minutes and the sun is 8 (rounded) light minutes away from us. But if you really want to know how far away the sun is from us in light years it is 0.000015 of a light year away from us.
50,000 light years (thats long)
8.7 light-years is 51,144,039,300,000 miles.
The Milky Way's diameter is about 100,000 light-years.
14 Billion years
light years
5 years in light years
That means that M31 (the Andromeda Galaxy) is at a distance of about 2.5 million light-years, and that it takes the light 2.5 million years to get here. Light moves quickly, but not instantaneously.
It's exactly 7 light years away.One light year is the distance that light travels through space in one year.7 of those is a distance of something like 41,150,289,900,000 miles.
4.25 years, because it is 4.25 light years away.
2.5 million years
6,300 years
The Milky Way is about 100,000 light years in diameter; it would take light about 100,000 years to cover the whole distance.