The best way to address any of those issues is providing sustainable economic prosperity, and the only way to achieve that is expansion into space.

Building public support is doing something. As is living your normal life with this purpose in mind. Personally, I'm reducing my consumer spending and donating to effective altruist causes, as I believe we need a functional civilisation to pursue goals like this which means addressing threats like climate change and also promoting a compassionate society which values the collective wellbeing. Real expansion into space may not happen for centuries, but the contribution our current society makes to that future, good or bad, will be enormous.

I guess you found PBS Spacetime already, if you're on YT. And I like David Kipping's work; it looks nice and helps me fall asleep. If lectures and discussions are your thing, I could maybe name a couple more.

A good thing to consider is when they formed; look at what the big bang people say the size of the universe was when the CMB formed, and divide. Otherwise I'm not sure the question will ultimately be easy to well-define. (But I don't know this stuff)

It's mooning us?

Far be it for me to downplay the importance of space exploration, but at the rate we're going, Earth will become uninhabitable to humans long before we have any realistic chance of colonising Mars.

I seem to recall reading that a population of about 100,000 would be needed to assure enough genetic diversity for the colonists. Building a shelter that could house that many, not to mention provide food, water, air and radiation protection would be a colossal undertaking.

Hell, just getting the required materials there would take years, and the price tag would be eye-watering.

Humans being humans, and this being a profit-free enterprise, I just can't see this getting the support it needs until it's far too late. A civil war over who gets to go before the project is even half way done seems far more likely.

Anton Petrov has lots of good space based content

https://youtube.com/@isaacarthur3209

Exactly correct. Lets colonize other worlds so we can mess it up just as bad as ours.

Nah - lets fix our polluted world before we start ruining others

What specifically are you doing to advance this goal of yours?

Outdone only by rythyms

Not quite as fun or interesting (or even pertaining to space) as your's

I'd rather fix the environment in earth, and achieve gender and racial equality before colonizing another planet.

I'm getting tired of all the attention given to the Fermi paradox.

Firstly, it's not a paradox and secondly, it's based on a lot of assumptions that are not supported by evidence.

It's even questionable that it's even Fermi's.

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https://www.nasa.gov/specials/artemis/

With Artemis missions, NASA will land the first woman and first person of color on the Moon, using innovative technologies to explore more of the lunar surface than ever before. We will collaborate with commercial and international partners and establish the first long-term presence on the Moon. Then, we will use what we learn on and around the Moon to take the next giant leap: sending the first astronauts to Mars.

>Therefore, I call upon the American people to embrace this challenge and to work tirelessly towards this goal. We must invest in research and development, inspire the next generation of scientists and explorers, and push the boundaries of what is possible.

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America can't afford it.

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https://www.nasa.gov/specials/artemis-accords/index.html

The Artemis Accords will describe a shared vision for principles, grounded in the Outer Space Treaty of 1967, to create a safe and transparent environment which facilitates exploration, science, and commercial activities for all of humanity to enjoy.
More than a dozen countries have signed the Artemis Accords.

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Melodysheep

been a while since high school chem but i'll give it a shot - at STP you can have approximately 602,214,076,000,000,000,000,000 hydrogen atoms in 22.4 liters. (molar mass ~1, ideal gas law, avogadro's constant)

throwing the above into some division and algebra, so a single atom of hydrogen would be about a 3.7 nanometers3, at stp.

i'm not sure where I went wrong with the above though, as it doesn't really pass the sniff test - several legit websites refer to the diameter of H being about 0.1nm, and semiconductor manufacturing is currently making silicon features around 20-30nm. so, I'm probably incorrect by an order of magnitude, more than i can explain from my sloppy rounding. you'll get a better answer at /r/chemistry or /r/physics probably.

I have thought about this too. It’s a fun one.

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It has to be great filter. Given billions of years head start even if one civilization made it then galaxy would be filled with colonies in every soloar system...all intelligence must go way of dodo, just like were going. Technology evolves so much that our ape brains cant control it...or its simply we pollute the planet to the point were we devolve and are unable to leave.

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Forget the paradox. Why would extraterrestrial life even want to contact us. If they are advanced enough to contact us, maybe they have a “prime directive” that prohibits interference. Since we would be so behind their technology. Or maybe they want nothing to do with us. We treat each other with such disrespect. We allow poverty and give no medicine to billions around the world. So even with the Fermi Paradox, would you want to contact this planet?

It seems strange to me that the moon has no weather. I know it has no atmosphere, but every second of my life has been spent on Earth, where weather is unavoidable.

It's still up there? So weird.