If a space ship travels at 200 000 km per hr how long will it take to travel from Earth to Neptune?

Answer 1

Neptune's average distance from the Earth = 4,564,000,000 km

4,564,000,000 ÷ 100,000 = 45,640 hours

45,640 hours = 1901 days and 16 hours

= 5 years, 76 days, and 16 hours

Answer 2

The correct answer is that there's a lot more to it than just the speed of the spacecraft, and it takes an orbital physicist to come up with an answer. The reason is that spacecraft do NOT travel in straight lines. You and I, the planets, and the spacecraft, are all in orbits around the sun, and that doesn't change when we send a spacecraft to another planet. What we do with the rocket motors is only to tweak the spacecraft's solar orbit into a long elliptical orbit that intersects both the earth and the planet we want to hit. So the actual path winds up being a long, expanding curve.

But just to give you some kind of a feeling for the distances involved, let's assume that a spacecraft could travel a straight line from the earth's orbit to Neptune's orbit, and let's work out a number for the time required.

The average radius of the earth's orbit is 149.6 million km (93 million miles). The average radius of Neptune's orbit is 4.495 billion km (2.793 billion miles). So the average distance between the orbits is 4.345 billion km (2.700 billion miles).

You specified a speed of 200,000 km per hour (about 124,300 miles per hour).

The time required to cover the average distance between the orbits of earth and Neptune is

(4,345,000,000 / 200,000) = 21,727 hours = 59yrs + 192days. (approximate, rounded)

Again, this assumes a straight-line path from the earth to Neptune's orbit, which is NOT the route taken by spacecraft.

Answer 3

It Takes About 120 day 40 hr 65 mins an aprox. 78 secounds