NotAHamsterAtAll

NotAHamsterAtAll t1_j1dh0e7 wrote

If you believe that the universe is expanding from a much denser state (makes no sense, but whatever) and the rate is give by the Hubble "constant" (its not constant), and then calculate backwards (assuming a lot of stuff), then you get 13.8 billion years or so.

Its all based on the assumptions you want to pin your creation mythos on.

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NotAHamsterAtAll t1_j0nitxo wrote

An expanding universe has never been measured. It is just a hypothesis inferred from redshifting of distant light + Big Bang hypothesis, nothing more.

To explain the issue of why the expansion isn't measurable, a bullshit explanation about galaxies being "gravitationally bound" has been introduced.

In short; no adjustments are needed, as spacecrafts does not need to adjust for hypothetical forces.

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NotAHamsterAtAll t1_iyegcpr wrote

Its easier to understand if we scale things down a bit.

Imagine the sun is a grain of sand on the beach, at this scale, the earth is 15 cm away and invisible.

At that scale the nearest star is 40 km away.

And the center of the galaxy is 2/3 the way to the moon.

Galaxies are extremely sparse objects, so nothing will really happen as far as collisions go.

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NotAHamsterAtAll t1_ixgjmi0 wrote

Do you think life on Earth is imminently going to end?

This is a very common thing that humans have thought for millennia, and has been proposed and supported by the experts throughout the times. And despite all the noise, there is nothing indicating that this is in fact going to happen.

Think we'll see any hint of interstellar colonization in our lifetime?

Haha, no chance in hell. Maybe by the end of this millennia, aka 2900 or thereabout. If ever.

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NotAHamsterAtAll t1_iw4fl2y wrote

I don't think humans will ever leave this solar system.

There is nothing indicating that anything but slow-boating is possible, and it is meaningless for humans to do such a thing.

Of course we will invent immortality and self-aware AI first, as neither of those are particularly difficult compared to interstellar space travel.

So when we have both immortality and self-aware AI, we will send something out that won't get bored to pieces for 1000 years while waiting to arrive at the nearest star system.

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NotAHamsterAtAll t1_iuhcmql wrote

You can expect the correct answer to this, when we have figured out everything about the universe.

We have about 2% figured out.

So any answer you'll get is going to be wrong.

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