# How Far Is A Lightyear In Kilometers. Most Successful Hookup Sites!

### Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting

How Far is a Light Year?

13 Nov A light year is the distance that light travels in a single year. And light travels fast. 1 lightyear is 9,,,, kilometers. Need some other measurements? A light year is 5,,,, miles. And a light year is 63, astronomical units (1 astronomical unit, or AU is the average distance from. 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 , 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,,,, kilometers. Why would you want such a big unit of distance ?. 5 May Let's not make up what we think might make sense, as the other four responses have done so far. The light-year is a concept used by astronomers to communicate large (astronomical) distances to the general public. (By the way, for interstellar dist.

At first glance, you may think that a light year is a measure of time given that it has the word year in it. Light years are actually a measure of distance that uses light as a standard. If you have ever told a friend you are about five http://malishka.info/ti/how-to-get-a-girl-to-say-yes.php away, you have also used time as a measure of distance.

To calculate the actual distance of a light year, you simply need to multiply the speed of light by the number of seconds in a year. Now you are helping others, just by visiting wikiHow.

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Menghitung Satu Tahun Cahaya. Define the light year. A light year is a measure of distance equal to how far light travels in one Earth year. Because distances across the universe are so large, astronomers use light years. Without light years, discussing the distance between two stars would How Far Is A Lightyear In Kilometers the use of large, unruly numbers.

It is equal to 3. It is another way to simplify the numbers used to calculate and discuss astronomical distances. Write the formula for distance.

If you want miles, you will need the speed of light in miles per second.

The nearest large galaxy clusterthe Virgo Clusteris about 59 million light-years away. Distances between objects within a star system tend to be small fractions of a light year, and are usually expressed in astronomical units. In fact, it takes between six months and a year just to reach Mars, which is only

You need to know the number of seconds in one Earth year for this calculation. Define the speed of light. Light in a vacuum travels at a velocity ofmiles per second. This is the equivalent ofkilometers per second or , miles per hour. For this calculation we will use the speed of light, c, equalsmiles per second. This can be rewritten in scientific notation as 1. Calculate the number of seconds in a year. To find the number of seconds in a year, you will do a series of multiplications by conversions units.

To convert years to seconds you will multiply the number of days in a year times the number of hours in a day, times the number of minutes in an hour, times the number of seconds in a minute. Plug variables into equation and solve. Replace c with 1.

Calculate the distance in kilometers. If you wanted to calculate in kilometers, simply replace the speed of light with the speed in kilometers per second: The time in seconds remains the same because there is no conversion required.

Identify the distance you want to convert. Before you begin, you will want to make sure that whatever distance you are working with is either in miles if using Imperial units or in kilometers if working with metric. To convert feet into miles, remember that there are 5, feet in a mile: Determine the correct conversion factor.

To convert from kilometers to light years, you will use: Multiply the original distance see more the conversion factor. Once you have determined the proper conversion factor, you can multiply by the original distance to obtain the distance in light years.

When numbers are large, it is best to use scientific notation. If you knew that an object was approximately Use the miles conversion factor: The object is light years away. You can always ask for assistance from your teacher and fellow students. There are also many resources online and in your text book to help you when converting to light years.

length conversion

Remember, there are always multiple ways to get help when looking for an answer. You're helping people by reading wikiHow wikiHow's mission is to help people learn, so we really hope this article taught you what you wanted to know. Yes, I read the article. How do I calculate how many light years Alpha Centauri is from the sun? It cannot be calculated, only observed.

For example, the observed stellar distance of Alpha Centauri from Earth is 4. Not Helpful 6 Helpful Is it true that if our sun suddenly blew up, we wouldn't know it for 8 minutes?

Yes, slightly more than eight minutes. Not Helpful 1 Helpful 4. A light year is not a measure of time. It's a measure of distance. Not Helpful 4 Helpful 7. The conversion factor is one light year equals 9. Not Helpful 2 Helpful 4. How do How Far Is A Lightyear In Kilometers convert light year into km? One light year is 9. Not Helpful 4 Helpful 5.

Read more about this image at Wikimedia Commons. By using this site, you agree to the Terms of Use and Privacy Policy. Acknowledgments StarChild Project Leader: The Great Attractor lies at a distance of somewhere between and million light-years the latter being the most recent estimate. The light-year unit appeared, however, in in a German popular astronomical article by Otto Ule.

If a star is a click here light years from Earth, we are seeing light from that star as it appeared a million years ago. How can I know it's even there any more? A good case of this is the Pillars of Creation in the Eagle nebula.

We've seen the light from a supernova that might destroy them, but the Pillars are further away from us than the supernova, so the light from the destruction hasn't reached us yet. Not Helpful 3 Helpful 4. Is it true that light travels 10 miles in 50 micro seconds? Here is the figure.

It takes 1 second for light to travelmiles.

#### Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting

So it takes 5. Not Helpful 0 Helpful 1. How do I calculate light years to proxima centauri? You can't calculate it directly. Astronomers observe the star and use a method called parallax, which gives the distance in parsecs.

StarChild Question of the Month for March 2000

Not Helpful 5 Helpful 5. Light can excite electrons, but cannot provide http://malishka.info/ti/how-to-get-rid-of-a-stubborn-pimple.php kinetic force to any practical or measurable extent.

Not Helpful 5 Helpful 3. How do I calculate the light years between a star and Earth? Distances to relatively close stars are calculated using the principle of parallax. It works only with stars that are not near the plane of Earth's orbit around the sun.

The known diameter of Earth's solar orbit is compared to the angle a distant star makes with the Earth's horizon at one time of the year versus the slightly different angle formed six months later at the opposite side of the orbit.

Not Helpful 0 Helpful 0. Include your email address to get a message when this question is answered. Already answered Not a question Bad question Other. Astronomy Mathematics In other languages: Thanks to all authors for creating a page that has been read 95, times. Did this article help you? Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy.

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