Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 4 weeks ago

# how long would it take to get to andromeda with our level of technology?

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• Bill-M
Lv 7
4 weeks ago

Our Current level of Technology is Voyager.

Do the Math:

The closest star to Earth are three stars in the Alpha Centauri system. The two main stars are Alpha Centauri A and Alpha Centauri B, which form a binary pair. They are an average of 4.3 light-years from Earth.

One Light Year is 5.88 trillion miles.

5.88 times 4.3 = 25.2 Trillion Miles

25.2 Trillion divided by 38000 = 663157894.737  hours

There are 8760 hours is a year.

More division = 75702.95  years

Andromeda Galaxy is 2.5 Million Light Years. So if you travel at the speed of light it will take you 2.5 Million Years to get there.

• cosmo
Lv 7
4 weeks ago

At our level of technology, you might as well wait for Andromeda to come to us, as it will in the next 2.5 billion years.

• 4 weeks ago

Till we become bones in our space craft.

• 4 weeks ago

It would take billions of years, even assuming that propulsion technology suddenly took a giddyup, which it won't do, as it appears to have peaked.

Besides, what's the attraction? What do you expect to find there that can't be found within the solar neighborhood in this galaxy? There are hundreds of billions of stars in this galaxy. What's wrong with attempting to explore some of those, and discovering all the dried up sterile planets orbiting those?

• 4 weeks ago

In order to leave Earth orbit, a vehicle has to reach escape speed. If you do this from the ground (or from low Earth orbit), it is around 11.2 km/s

To reach the Moon (almost escaping Earth), they went to 11 km/s from low orbit.

To leave the Solar system, you need to reach 42.4 km/s if you do it from Earth's orbit. If you do it at the right time, shooting off tangent to Earth's orbit, you can use Earth's orbital speed (30 km/s) and add 12.4 to that. New Horizons was lauched with a speed of 16.26 km/s, which gave it (barely) Solar escape.

Even though all probes that have attained Solar escape speed needed gravity assist (New Horizons only needed one, from Jupiter, and it was mostly for direction and a bit of extra speed), we can send probes directly with sufficient speed to escape the Solar system.

Next comes the Galaxy. In order to get to the Great Andromeda galaxy (M-31), we need to reach Galactic escape speed which, from our neck of the woods, is around 312 km/s (approx. 700,000 mph). This we can't do... yet.

Using gravity assists inside our Solar system (using Jupiter, for example) would be almost impossible as you would need to be doing already over 300 km/s, which would require you to pass extremely accurately close to Jupiter (you'd have to know your position within a centimetre).

Again, if you could use the Sun's speed of 220 km/s, you would only need to add roughly 100 km/s (plus the 12.4 and 11.2 for Sun and Earth escape). We are not yet at that level... but we are getting there.

New Horizons, launched at 16.26 km/s from Earth, is still the fastest launch so far. (Don't forget to mentally add the 30 km/s of Earth's orbital speed for its speed relative to the Sun).

Despite a lower launch speed, Voyager 1 is presently moving at 4 km/s faster than New Horizons' present speed (13 km/s), but that is because it got two bigger gravity boosts (Jupiter and Saturn).

Reaching a launch speed of 100 km/s (six times faster than New Horizons's record launch speed) will be quite a step.

As objects climb out of the gravitational well of the object they try to escape, they do slow down. Even if we ignore that, an object travelling at Galactic escape speed (312 km/s) would need a thousand years to travel ONE light-year. Since M-31 is over 2 million light-years from us, it would take 2,000 million years for that object to reach it.

• 4 weeks ago

• 4 weeks ago

Back of the envelope calculation:

Fastest interplanetary probe we can launch is about 40,000 mph to Pluto and beyond.  That is 5.965 x 10^-5 or about 0.00006 times speed of light.

Andromeda galaxy M32 is at least 3 ,000,000 light years, divided by 0.00006 light speed gets 5,000,000,000 years travel time.

• 4 weeks ago

We'd get there faster just by letting Andromeda come to us, which is what it's doing.  It will be here in about two billion years.

• Clive
Lv 7
4 weeks ago

Millions of years.

• Anonymous
4 weeks ago

We simple do not have the means, the amount of rocket fuel isn't there and we wouldnt be able to contain it all and carry it if we had it, I think if we could it would take 25 million years. We need new technology