How long would it take travel 4000 light years?

Answer 1

When Mercury is on the opposite side of the sun from us, it would take a bit longer. Assuming we're both on the same side, it would take light between four and five minutes to reach from Earth to Mercury.

Something traveling 40,000 miles per hour would require 1250 hours, or 52 days. Pretty close to two months.

Answer 2

At the speed of light it would take 4 years.

At any humanly attainable speed, it would take a great deal longer. The fastest objects humans have put into space moved at less than 100,000 km / hour.

4 light years is about 3.8 x 1013 km. Dividing that by 100,000 km / hour, we get 3.8 x 108 hours (380,000,000 hours) which is about 43,000 years.

Answer 3

The farthest objects we can detect with modern astronomical instruments are

about 14 billion light years away from us. In every direction, as if we're at the

center of the universe.

That's not the end of the universe. It's just the farthest we can see, and we have

no idea how much farther it continues past that.

But for just that piece that we can see, it would take a beam of light 28 billion years

to cross it.

Answer 4

Spacecraft do not travel in a straight line. They usually swing past other objects, such as the moon, and in doing so gain "slingshot" acceleration. Also, the distance between the Earth and Jupiter depends on where in their orbit they are. It can range from 630 million to 930 million km. At 40000 miles per hour, it would take between 9840 and 14530 hours, approx.

Answer 5

The speed of light is 186,000 miles per second, so divide 4000 by that figure. It's roughly .02 seconds, about 20 milliseconds.

Answer 6

0.004 294 56 second in vacuum

0.004 295 75 second in air

Answer 7

4000 Years at the speed of light

Answer 8

0.21 seconds.

Answer 9

.004 sec