How many kilometers equals One light year?
465223
That would be approximately 9.5 trillion kilometres.
998475
4.28 billion km or\n2.66 billion miles )
246303
kilometer. one kilometer = about 0.62 mile
591913
Despite it sounding like time, light year measures distance.\nIt's the distance that light travels in space in one year, a very long distance.\n\n186000*365*24*3600 = 5.87 x 10^12 miles.
390051
The calendar year is a measure of time. The light year is a measure of distance. They are not comparable.
158836
The Milky Way galaxy, our galaxy, is 80-100 thousand light years in diameter, and about 3000 light years thick.\n\nA light year is the distance light travels in one year, so it is a measure of distance and not time.  One light year equals about 5,878,499,810,000 miles.
44713
The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year.
383249
The Hubble Space Telescope can see out to a distance of several billions of light-years. A light-year is the distance that light travels in 1 year. Since light has a speed of 186,000 miles per second (light can travel about 7 times around the entire earth in 1 second!), light travels about 5,865,696,000,000 miles in just one year. You can attach 9 more zeros to the end of this to get 1 billion light-years and another one for 10 billion light-years. The farthest that Hubble has seen so far is about 10-15 billion light-years away. The farthest area looked at is called the Hubble Deep Field.
1121759
well...we know that the universe is 156 billion light years...that means that it takes 156 billion years for light to get across. (ei) if a star at the very end of the universe exploded, 156 billion years from now, we would see it
587733
Light travels at 186,282 miles per second.  So multiply by 60 (seconds per minute) by 60 (minutes per hour) by 24 (hours per day) by 365 (days per year), which gives 5,874,589,152,000 miles for 1 light year.\n4.2 light years works out to 24,673,274,438,400 miles.  Quite a long walk :) \nHere's a way of illustrating this:\nIt takes light 1.27 seconds to travel the 238,000 miles from the Earth to the Moon.  If this distance is represented by 1.27 inches, then an object one light year away would be 636 miles away, and a star 4.2 light years distant would be 2,670 miles away - about 200 miles more than from New York to Los Angeles!
41892
An astronomical unit is defined as the mean distance between the Earth and the Sun. 1 au = 149,597,870 kilometers = approximately 92.95 million miles.
16179
It is approximately 2.2 million light years away.  A light year is 5,865,696,000,000 miles (9,460,800,000,000 kilometers), so multiply this by 2.2 million and you have the distance in miles/kilometers.
19286
The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year. To obtain an idea of the size of a light-year, take the circumference of the earth (24,900 miles), lay it out in a straight line, multiply the length of the line by 7.5 (the corresponding distance is one light-second), then place 31.6 million similar lines end to end. The resulting distance is almost 6 trillion (6,000,000,000,000) miles!
488135
A little over 4.35 light years.
415548
light travels at 186,000 miles per second, the earth is 25,000 miles around....\n\n25000/186000= 0.1344 seconds
913686
This is a simple ratio problem. The equation would be Dgalaxy/Dearth=Dearth/x so x=(Dearth)^2/Dgalaxy. Asssuming a parsec is 3.6 light years, and a light year is 5.87 trillion miles and the diameter of the Earth is 8,000 miles, then the Earth would be 0.001 millimeter or one micron in size, which is the size of an average bacterium, maybe? Very cool. Oops! I re-did my calculation and I see that I made a factor of ten error. The correct answer is about 0.1 microns, or the size of some viruses. But tell me how you would make such a model of the Earth?
621324
Around 105 light years, or 3x10^5 km/s * 365 * 24 * 3600s * 105 km, or 993 384 000 000 000 km, or 617 277 076 989 996 mi