Q&A: What's a Type IV Civilization and More...
Guide to Space Q&A Ep. 15
Q&A: What's a Type IV Civilization and More...
Airdate: 03/15/2017
Comments (8)
Tried the Dark Site Finder. Turns out, if you live in the Rhein-Main area in Germany, you're screwed. And I don't have a car. I'll never see the milky way ... *sighs*
How about this park? This looks close: <a href="http://darksky.org/idsp/parks/eifel/" rel="nofollow noopener" target="_blank">http://darksky.org/idsp/parks/eifel/</a>
Hey Fraser. I'd suggest Type 4 uses their local group's energy. Maybe a 5 would be what you're describing? ;)
I don't think that's ambitious enough. To go from 1 star to 200 billion stars is a big jump to do 2-3. Type IV should be an even bigger step.
Re your answer to wiping out all life on Earth -- I felt it was a bit of a waffle. Perhaps you and Isaac could get together and come up with a table to show, I dunno, pick a number, a 90% or 95% or 99% wipeout rate that based on the energy released. Can you estimate the impact energy necessary to wipeout 90% of life? If so, what mass:speed combinations would produce it. Good luck!!! ;~)
We've seen that no impact in the history of the Earth has been able to actually wipe out all the life. It always finds a way to return.
Hi Fraser - Question: If we and everything we see in the universe all started at the same point at the same time 13.5 billion years ago, how could we possibly be far enough away from other stuff in the universe for Hubble to see 13 billion year old light?
The Universe is far bigger than we can see. We can only see stuff that emitted light 13.8 billion years ago, which has now moved to be about 45 billion light-years away.