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#Post#: 11241--------------------------------------------------
Doomsday
DIR By: rp
Date: February 14, 2022, 1:52 am
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What are your thoughts on something like this happening?:
HTML https://youtu.be/PENT_hnyO-o
Do you think it would be a surefire way to solve all our
problems?
Because at this point, this is the best I could hope for a
solution that is realizable within my lifetime
#Post#: 11250--------------------------------------------------
Re: Doomsday
DIR By: guest55
Date: February 14, 2022, 1:56 pm
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--- Quote ---
> Because at this point, this is the best I could hope for a
solution that is realizable within my lifetime
--- End Quote ---
:D
Hey, maybe it's time for you to accept the fact that victory is
for a couple generations down the line and the best we can do is
to just keeping passing as much information forward as possible
so they are not easily misdirected or deceived by our enemies?
#Post#: 11335--------------------------------------------------
Re: Doomsday
DIR By: Zea_mays
Date: February 17, 2022, 6:09 am
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There are bacteria that live miles underground, on the bottom of
the ocean, bacteria species which can tolerate extreme acidity,
extreme sunlight, extreme heat and cold, etc. I think even an
extreme asteroid would not end life.
HTML https://en.wikipedia.org/wiki/Extremophile
The Earth may be destroyed by the Sun becoming a red giant in 5
billion years, but life has existed on Earth for 4 billion
years--so even if an asteroid wiped out all multi-cellular
lifeforms (extremely unlikely), it is possible for them to
re-evolve to the same level of complexity that exists today.
I would also be concerned that the particles ejected into space
from the impact could contain bacteria, which would then drift
throughout space, possibly leaving the solar system and landing
on another planet... (Westerners want to simulate this process
to put lifeforms on other plants...)
HTML https://en.wikipedia.org/wiki/Panspermia
Also note that the narrator around 8:45 says such an event
actually occurred on Earth around 4 billion years ago, but
within only ~1000 years, things went back to "normal", allowing
for life to evolve in the first place.
I think launching the Earth into the Sun (in a controlled manner
to minimize the number of particles that are launched out) may
be one way to safely end Earth's existence. But apparently the
physics required to change Earth's orbit to make that happen are
not very practical.
#Post#: 11340--------------------------------------------------
Re: Doomsday
DIR By: Polinc_Socjus
Date: February 17, 2022, 1:56 pm
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--- Quote ---
> The Earth may be destroyed by the Sun becoming a red giant in
5 billion years, but life has existed on Earth for 4 billion
years--so even if an asteroid wiped out all multi-cellular
lifeforms (extremely unlikely), it is possible for them to
re-evolve to the same level of complexity that exists today.
--- End Quote ---
I remember saying something similar on the old forum. They would
still have a whole billion years to escape the solar system.
I also mentioned a more effective way to destroy the world on
the old forum.
HTML https://youtu.be/ijFm6DxNVyI
But still it's not perfect because as the narrator says, It
would only destroy life as we know it, and it wouldn't keep up
with the expansion of the universe.
#Post#: 12184--------------------------------------------------
Re: Doomsday
DIR By: rp
Date: March 20, 2022, 9:34 pm
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HTML https://www.nature.com/articles/d41586-020-02338-w#:~:text=If%20the%20Universe%20holds%20enough,any%20life%20on%20nearby%20planets.
--- Quote ---
> [size=12pt]Scientists know how the world will end. The Sun
will run out of fuel and enter its red-giant phase. Its final
burst of glory will expand and engulf the closest planets,
leaving Earth a charred, lifeless rock. Our planet has around
five billion years left.
>
> With this grim image, theoretical astrophysicist Katie Mack
begins her book on the end of the Universe — a much more
uncertain prospect. Cosmologists generally look backwards,
because all the evidence they can examine with telescopes is far
away and concerns things that happened long ago. Using the
motions of distant stars and galaxies to predict possible
futures involves more speculation.
>
>
> From Big Bang to cosmic bounce: an astronomical journey
through space and time
>
> In Mack’s hands, this speculation makes for a fascinating
story. Humans are, she writes, “a species poised between an
awareness of our ultimate insignificance and an ability to reach
far beyond our mundane lives, into the void, to solve the most
fundamental mysteries of the cosmos”. She is a talented
communicator of complex physics, and the passion and curiosity
about astronomy that have made her a popular speaker and Twitter
presence are evident here. (As are some nerdy jokes and a less
compelling coda about new physics research tangential to the
central theme.)
>
> Mack begins at the beginning, with the Big Bang. What followed
was inflation — a period of rapid expansion. Then, structures of
dark matter formed and the building blocks of stars, planets,
life and galaxies assembled. Currently, dark energy, thought to
pervade the Universe, somehow counteracts the forces of gravity
to keep driving expansion.
>
> The Universe’s fate depends on whether that expansion will
continue, accelerate or reverse.
>
> The Big Crunch
> Astrophysicists long considered the most likely denouement to
be a reversal of the Big Bang — the Big Crunch. Outside our
cosmic neighbourhood, every galaxy is zooming away from us; a
clear sign of expansion. If the Universe holds enough matter,
including dark matter, the combined gravitational attraction of
everything will gradually halt this expansion and precipitate
the ultimate collapse. Over time, galaxies, then individual
stars, will smash into each other more frequently, killing off
any life on nearby planets. In the final moments, as densities
and temperatures soar in a contracting inferno, all that remains
will extinguish in a single point.
--- End Quote ---
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