Earthed - How many earth years to travel the distance covered by a light year?

How many earth years to travel the distance covered by a light year?

Yes. I get it. Light year measures Distance.

Let's say that another planet in some other galaxy is 10 light years away from the Earth. If we were to lauch a spacecraft to that planet, how many Earth years would it take to get there?
I am not sure - but let's just say the average spacecraft speed.

Public Comments

You don't specify how fast the spacecraft will go, so the question cannot be answered.
Depends on how fast the ship is
At what speed?

It will take 1 year if traveling at the speed of light. It will take 2 years if traveling at half the speed of light. It will take half a year if traveling at twice the speed of light. And so on.
depends on how fast its going. how fast is that?

just like any other calculation of time, speed and distance.
It depends entirely on your speed. At a speed of 30 km/sec, it would take 10,000 years to go one light year. 100,000 years to go ten light years.

(30 km per second is about twice the speed of our fastest space probes.)

At the speed of sound (at sea level), it would take 8,800,000 years to go 10 light years.
Depends on how fast the craft is going, and also if one measures the time taken on board the craft or on earth, since the faster one goes, time slows down for those aboard the craft, as compared to those on earth not travelling at said velocity.

So an unanswerable question just now sorry.
10 light years means it would take light 10 years to get to that planet say.... get a telescope and you would be seeing that planet 10 yrs in the past (i dont think there is such a telescope but anyways ) i would say it would take around 100k years and thats just an estimated guess and we would have to still be going wayy fast
At the speed of light --- 10 years---
...you didn't say how fact "your craft was"... Light travels 186,000 miles per-second... you do the math.
Your concept of interstellar distances is sorely lacking. The nearest galaxy is a dwarf galaxy roughly 25000 LY distant. M31 in Andromeda, the famous Andromeda galaxy which is due to collide with us in a couple of billion years (duck and cover) is 2.5 million light years. 10 LY is CLOSE. Time would depend upon speed. Speed would depend upon the technology you had available and how much you were willing to spend on fuel. Fuel requirements for interstellar travel are awful. If you allow 900 years for your trip and you don't plan to stop then the figures are as follows:

1. fission rocket: 1 billion supertankers fuel

2. fusion rocket: 1 thousand supertankers fuel

3. antimatter rocket: 10 railway cars fuel.

If you plan to stop at your destination double both your time and your fuel. Thus a fusion rocket would require 2000 supertankers worth of fuel. If you plan to return home then multiply your original values by 4. Thus a fusion rocket would take 3600 years and use 4000 supertankers of fuel.

You would also need onboard energy sources requiring major fuel, and there would be major requirements for food, air, and water, unless you have 100% efficient recycling systems. And who would spend 3600 years on a space journey even if they were immortal. I'm an ex sub sailor. After two months at sea I wanted off that friggin boat.
Just for ease of calculation, I "rounded up" the speed of light to 6,000,000,000,000 (=6trillion) miles per year

[[ speed of light =186,000 miles per second (rounded)

x 60 seconds/minute

x 60 minutes/hour

x24 hours/day

x365.25 days/year = 5.9trillion miles/year

x 10 years = 60 trillion miles. ]]

Assume that the spaceship can travel 40,000miles per hour, it will take the spaceship approximately 1,800 YEARS to travel 10 light years.
the speed of light 186,000 miles a second.

it will take you ten years,travelling at this speed,to travel ten light years.

so it would be 2028 by the time you left earth,traveled to a planet 10 years away,picked up a souvenier,and traveled back.

i'll be in my 50's by then so dont get me anything too chewy,or it might hurt my teeth. ha ha.
Your question doesn't make sense, what do you mean by average spacecraft speed? There isn't one.

The speed of Voyager 2 which is out bound is about 40,000 km/hr, or 350,000,000km/yr.

At this speed it would reach the nearest star (4,22light years away) in about +50,000AD, so 1 light year would take about 12,000 Earth years.

1 light year is 9.46x10^12km so you can work it out for yourself if you are any good at maths.
The lower limit is 10 years.