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It's the distance light will travel through space in 4.2 years if it doesn't bump into
anything and get absorbed.
Here are some rough numbers to put it in perspective, if that's even possible.
Each of these is rounded:
-- 24,691,000,000,000 miles (24,691 billion)
-- as far as 987,600,000 trips around the Earth
-- 103,700,000 times as far as the moon is from Earth
-- 265,000 times as far as the Earth is from the Sun
-- about 507,000 times as far as the nearest that Mars can ever get to Earth
-- If the average height of every human being presently alive on Earth is 5 feet,
and a lot of them get together and stand on each others' shoulders (to get into
space without a space-ship), it would only take 251 million people stacked up to
reach the Moon ... less than double the population of Russia. So they would begin
to think that this is a pretty easy way to go places, and they might decide to get a
lot more people together and go to some more exotic places. But they would soon
be disappointed.
If all of the 7 billion people presently living on Earth got together and got stacked
up on a Sunday afternoon, they would reach only 0.14 of the distance to Mars
when it's as near Earth as it can ever be, and only 0.07 of the distance to the Sun.
Regarding your 4.2 light years ... If all of the 7 billion of us couldn't find a few more
friends to join in, then in order to reach that distance, we would have to stack up
3.7 million times over.
- The distance to Proxima Centauri - our nearest star (apart from the Sun)
- 265,606 AU
- 3.97342193 × 1013 kilometres
- 2.46896992 × 1013 miles
- 1.30361612 × 1017 feet
- 1.56433934 × 1018 inches
- 3.97342193 × 1018 centimetres
One light-year equals the distance light travels on one year. Since the speed of light is 299 792 458 meter per second, a light-year in vacuum is 9 454 254 955 488 000 m.
m/s = 31536000(60*60*24*365) m/year
Since the middel distance to the moon is 384 390 km, it takes the light 1.3 sec from the earth to the moon.
t = s/v => 3.84e+008 / 2.99e+008 = 1.3 sec
4.3 light year in vacuum is: 9 454 254 955 488 000 m * 4.3 = 4.065329631e+016 m (SI unit)
= 2.35e+013 miles
Let's clear something up: a "Lightyear" is a measure of DISTANCE (about 9.46 trillion kilometers), not time. If you're a photon, 424 light years is 424 times further than you can travel in a vacuum in one Earth year, but other than in ways similar to that it isn't meaningful to compare distances with times.
You've basically done the equivalent of asking "How tall is green?" There may be a context in which the question is reasonable (for example, if you have dowel rods that are color-coded by length), but without supplying that context it's pretty much nonsense.
1 light year is the distance traveled by light in a full year.
So 4 light years is the distance that light travels in 4 years.
If something is 4 light years away from the earth, the light will take 4 years to reach us.
It is how far light travels in 4.2 years (about 2.469*10^13 miles (1 light year is equivalent to about 5.879*10^13 miles)).
I'm not sure how long it would take the star to get here,
but the light that shines from it takes 4.4 years.
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How long does it take a star's light that is 7 light years away from Earth to reach Earth?
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.
What does a light year have to do with the sun and the earth?
A "light year" is a measure of distance, derived from "how far light can travel in one Earth year". Thus, if you shine a torch for the amount of time it takes the Earth to orbit the sun exactly once, that light would have travelled the distance of a "light year".
How many light years does it take to reach Venus from Earth not in light minutes I need light years please?
You are confused. "Light-year" is a measurement of DISTANCE, the distance that light travels in one year; it is not a time period. Venus is, depending on where Venus and Earth are in our respective orbits, between 2 and 14 light-minutes away; light would take somewhere between 2 and 14 minutes to span the distance. You can convert easily minutes into years; there are 60 minutes in an hour, 24 hours in a day, and 365.26 days in a year.
How many light years are equal to 4.5 billion years?
A light year is a measure of distance, not time. It is the distance light travels in a year.
Science says the universe is 12 to 14 billion years old because light from that far away has reached us but couldn't there be objects billions of light years further away?
Yes, current theory and observations suggest that the age of the universe is between 13.6 and 13.8 billion years (earth years).However please note that a light year is the distance a beam of light will travel in one earth year.
Convert 70000 light years to earth calendar year?
One light year is the distance light travels in one Earth year. So, 70,000 light years would be equivalent to 70,000 Earth years.
Can you convert 30 light years in earth years?
Since 1 light year is the distance light travels in one year, to convert 30 light years to Earth years, you simply use the value of 1 light year. So, 30 light years is equal to 30 Earth years.
What does 6300 light years equal to in earth years?
A light year is a unit of distance, not time. It represents the distance that light travels in one year. So 6300 light years is the distance that light would travel in 6300 years on Earth.
Earth travels around the sun in light years?
Earth orbits the sun in about 1 year, not light years. A light year is the distance light travels in a year, approximately 9.46 trillion kilometers. Earth's orbit around the sun is much smaller in comparison, about 150 million kilometers.
Is Capella is A light years away from earth how long will it take to reach earth?
A light-year is the distance light travels in a year. Therefore, if a certain star is "x" light-years from Earth, then it takes light "x" years to get fromthe star to us. Or the other way round.
How long does it take a star's light that is 7 light years away from Earth to reach Earth?
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.
How do you convert 3 earth years into light years?
you cant light years refer to the distance light can travel in 1 year 1 Light Year = 5878625373183.61 Miles
4.3light year is equais to how many earth years?
In spite of its name, a light year does not indicate time, but it indicates distance! It actually equates to the distance that light travels in one Earth year, which is a very big distance, seeing that light travels at 186,000 miles per second.
How much earth years makes 1 year on Sedna?
A year on Sedna is 10,500 Earth years.
How far in light years is the moon from the earth?
The average distance to the Moon is 384,399 kilometres = 4.06318742 × 10-8 light years (Note the minus) The moon is only a tiny fraction of one light year from earth. It takes light from the sun eight minutes to reach earth, and the moon is much closer to earth than the sun. Measuring such a small distance in light years is possible but impractical. ======================================= The moon is roughly 1.27 light seconds from the earth. (rounded) 1.27 light seconds is the same as 0.0000000406 light year. (rounded)
Stellar distance are usually expressed in what units?
A light year
Is a light year measured in distance?
Not really. A light year is a measure of distance. It is the distance light can travel in one earth year, about 6 trillion miles
