Life and Death of a Planetary System
exoplanets.nasa.gov
Life and Death of a Planetary System
1–10 of 31 posts
Re: Life and Death of a Planetary System
#2Q. Will Earth always be able to support life? A. Probably not [...] Over the next couple of billion years, the increasing amounts of energy Earth will receive from the aging, expanding Sun will warm its atmosphere.
Two billion years' work is a hefty amount in terms of scientific and technological development, assuming people survive. So, as David Deutsch would point out, what actually happens will depend on what solar engineers choose to do.
Re: Life and Death of a Planetary System
#3Q. Will Earth always be able to support life? A. Probably not [...] Over the next couple of billion years, the increasing amounts of energy Earth will receive from the aging, expanding Sun will warm its atmosphere. Two billion years' work is a hefty amount in terms of scientific and technological development, assuming people survive. So, as David Deutsch would point out, what actually happens will depend on what sola…
At some point it will become more economical to terraform other planets than to prevent the Earth from unterraforming.
Assuming the technology is there, we will have lots of choices available.
Maybe we can even do both.
Re: Life and Death of a Planetary System
#4Got me curious, how large the impact of a dying sun or a changing planet ..
Re: Life and Death of a Planetary System
#5Q. Will Earth always be able to support life? A. Probably not [...] Over the next couple of billion years, the increasing amounts of energy Earth will receive from the aging, expanding Sun will warm its atmosphere. Two billion years' work is a hefty amount in terms of scientific and technological development, assuming people survive. So, as David Deutsch would point out, what actually happens will depend on what sola…
At some point it will become more economical to terraform other planets than to prevent the Earth from unterraforming. Assuming the technology is there, we will have lots of choices available. Maybe we can even do both.
Yes, many many choices, and it's impossible to predict what our descendants will want. Perhaps the Earth will be preserved as a monument.
Re: Life and Death of a Planetary System
#6According to Hindu cosmology, there is no absolute start to time, as it is considered infinite and cyclic. There are multiple universes, each takes birth from chaos, grows, decays and dies into chaos, to be reborn again. Further, there are different and parallel realities.
Re: Life and Death of a Planetary System
#7Q. Will Earth always be able to support life? A. Probably not [...] Over the next couple of billion years, the increasing amounts of energy Earth will receive from the aging, expanding Sun will warm its atmosphere. Two billion years' work is a hefty amount in terms of scientific and technological development, assuming people survive. So, as David Deutsch would point out, what actually happens will depend on what sola…
This assumes that our level of technology will increase over such long time scales. It might be cyclical, resetting to zero periodically.
Re: Life and Death of a Planetary System
#8Q. Will Earth always be able to support life? A. Probably not [...] Over the next couple of billion years, the increasing amounts of energy Earth will receive from the aging, expanding Sun will warm its atmosphere. Two billion years' work is a hefty amount in terms of scientific and technological development, assuming people survive. So, as David Deutsch would point out, what actually happens will depend on what sola…
This assumes that our level of technology will increase over such long time scales. It might be cyclical, resetting to zero periodically.
Or it may flatten out as well. Without the need to reset.
Re: Life and Death of a Planetary System
#9According to Hindu cosmology, there is no absolute start to time, as it is considered infinite and cyclic. There are multiple universes, each takes birth from chaos, grows, decays and dies into chaos, to be reborn again. Further, there are different and parallel realities.
According to the Lord of The Rings, the world was sung into existence by Eru Ilúvatar and his Valaar. Elves, orcs, trolls, goblins and other creatures also came into existence.
Re: Life and Death of a Planetary System
#10Q. Will Earth always be able to support life? A. Probably not [...] Over the next couple of billion years, the increasing amounts of energy Earth will receive from the aging, expanding Sun will warm its atmosphere. Two billion years' work is a hefty amount in terms of scientific and technological development, assuming people survive. So, as David Deutsch would point out, what actually happens will depend on what sola…
We likely have much less than 2 billion years before the earth becomes uninhabitable: https://en.wikipedia.org/wiki/Timeline_of_the_far_future