Thread: About cosmology

Have you ever think about advancement of humanity's knowledge about cosmology?
If humanity support together. Will humanity survive eternally?

Well, I'm a strong supporter of colonising space so that humanity can continue to exist even if Earth is hit by a comet, or GRB etc...

First, we'll need to achieve H-Fusion, and also unite all the rich nations on the planet in order to build up a hugely effective worldwide space program. It can be done with a lot of effort and money, a world government would be able to achieve a feat like this...

Once humanity achieves being united and building ships strong enough and large enough to withstand long journeys and terrible conditions, we shall achieve a long existence of humanity...

We would first need to find planets "near by" (say within 50 light years) that would support our kind of life.

While most SF relies on FTL travel, we have no evidence that it is possible to travel faster than light so may end up with centuries long trips to planets outside our solar system. Possibly rather than a colony ship, we could hollow out Ceres (which has more fresh water than Earth does) and manage to propel that on such a voyage.

Even now people are working on human hibernation since supplies will be the big problem on such a trip and someone sleeping uses far less oxygen that someone awake.

However I think we would colonise our own solar system first if we cannot achieve FTL travel.

We would need to begin to understand interstellar travel and perhaps extending the human life span by improvements in biology to allow for the cosmic travelling between stars.

I do believe if we work together we can become a very good species in the cosmos for sure.

Originally Posted by Cyberia

we could hollow out Ceres (which has more fresh water than Earth does) and manage to propel that on such a voyage.l.

I'm not saying this might not be true, but I'd like to see some citations, or a well reasoned argument to support it. I think I can refute anything you come up with, but lets see.

To hollow out Ceres would take about 100 years and probably as many men as seconds in that time. No point whatsoever! Science nonsense

Originally Posted by Michael_Roberts

To hollow out Ceres would take about 100 years and probably as many men as seconds in that time. No point whatsoever! Science nonsense

I have no problem with hollowing out Ceres. I do have a problem with a fresh water content greater than the fresh water on the Earth.

Total volume of freshwater on the Earth: 9 x 10^6 cubic miles

Total volume of Ceres: 100 x 10^6 cubic miles

So for the statement to be true we need Ceres to have a 10% porosity, on average, all filled with fresh water. (I concede that the water might be tied up in hydrated minerals. In that case I have a problem with calling this fresh water.)

OK. I see some - not all - models of Ceres call for an icy mantle. If that is there then the statement would be true as far as water is concerned. I'm not sure how fresh it would be.

I'm suspicious of the model, as the spectra, while it shows plenty of hydrated minerals, doesn't scream out water.

Ill let you guys hollow it out then!!

Originally Posted by ThaiBoy

Have you ever think about advancement of humanity's knowledge about cosmology?
If humanity support together. Will humanity survive eternally?

Eternally is too long. According to current theory, all stars will eventually burn out and there will be no energy to support life.