Our Fastest spacecraft is the New Horizons.

A light year is the distance between two points in space that it would take light to travel when the distance between the two points in time are one year. How far is 40 light-years? New Horizons is covering about 3.9 AU's per year. --- So if we doing it today, we will see trough that mirror over 10 years the planet as today.

1 year. Determining how long it takes to travel one light year depends in part on the speed of the observer. 1 decade ago.

Suppose you and I are at rest relative a star 1 light-year away from us. The time that it takes us to travel one light-year is (unsurprisingly) considerably longer than a year. Lv 4. That is a 6 with 12 zeros behind it! If the observer is traveling at the speed of light, then by definition it takes one year. Favourite answer. More than 16 Thousand Years. mystic_golfer. Light travels at a speed of 186,000 miles (or 300,000 km) per second. The speed of light is 186,000 miles per second or 671 million miles per hour. what this would be. How long does light take to travel a distance of one light-year? In fact, it takes between six months and a year just to reach Mars, which is only 12.5 light-minutes away. what this would be. So you multiply "c" by 60 x 60 x 24 x 365. A light-year is a measurement of distance and not time (as the name might suggest). This simple calculator will allow you to easily convert 1 light years to mi. So, let's see (pun!) Light travels 9,454,254,955,488 Km per year. That is where the expression light-year comes from. Those are really large numbers! 186,000 miles per second times 3,600 seconds in an hour divided by 17,500 mph we travel at 38,263 times slower than light speed New Horizons would take 16,215 years just to go one light Year. Load More

17 Answers. ", since you are asking "how long" (time duration), the answer is 365 days or 1 year. Looking Back in Time. When we use powerful telescopes to look at distant objects in space, we are actually looking back in time. 1 light-year = 63240 AU (astronomical units) 63 240 / 3.9 = 16,215.3846. As to your question "How long does light take to travel a distance of one light-year? - 11920509 Log in to reply to the answers Post; Pamela. How long does light take to travel a distance of one light-year? How far is 1 light year in miles? A light year is a measurement of distance that signifies how far light travels in one year. Now the question is How long will it take to slow down from (500mph or so) in space.and we dont have a craft that can hold that much fuel. The result is the total distance covered by light in one year. How long would it take to travel 10 light years at the speed of light? Multiply the number of seconds in one year by the number of miles or kilometers that light travels in one second, and there you have it: one light-year.

One light-year is about 6 trillion miles (9 trillion km). How can this be? How long is 1 light year? Spacecraft travels at around 50,000 Km per hour 438,000,000 Km per year Just over 21,585 years to … In short, at a maximum velocity of 56,000 km/h, Deep Space 1 would take over 81,000 years to traverse the 4.24 light-years between Earth and Proxima Centauri. A light-year is the distance light travels in one Earth year. Relevance. 0 1 1. So, let's see (pun!) In February 2017, astronomers detected seven Earth-sized planets orbiting a single star 40 light-years away from Earth. Suppose I get into my space ship, accelerate near to the speed of light (in your frame) travel to the star, and then decelerate such that I when I arrive at the star I'm back in the frame of you and the star. Light travels a whopping 9,460,528,000,000 km in a year, equivalent to 5,878,499,562,555 miles. Answer Save. We call this distance as one light-year. It would take the light 5 years to get to the mirror, and 5 years to travel back.