Ceiling Cat iz watching U |
Fun factoid:
No field has benefited more from
the computer revolution than
astronomy.
-- J. Richard Gott, The Cosmic
Web (2016), p. 144
Gott’s book, handsomely produced by Princeton University
Press, is at opposite poles from the usual popular “If it’s Tuesday, these must
be black holes” (or even dinosaurs) breezy overview of cosmology. He focuses on a single research interest -- the statistical
distribution of stars, galaxies, supergalaxies etc. -- and gives us a lab-bench
look at it (or at least, as per the above, a computer-screen view -- heavy reliance on simulations). Despite the sexy title, “Cosmic
Web”, the book is very far from “Physics porn”, since it really is about the
cosmos, and the stellar distributions do indeed resemble a web -- or rather a sponge
(a Sierpinski sponge, so to speak).
A view from the atrium of Sierpinski Tower |
Nonetheless, he does, without fanfare and towards the very end of the book
(p. 210), finally arrive at the payoff you have all been waiting for:
The Fate of the Universe
Turns out the whole thing hangs on a little parameter dubbed
w.
W !!!!
W (artist’s rendering; not shown actual size) |
This he defines as “the ratio between the pressure
associated with dark energy and
the energy density of dark energy”.
Now, given that nobody really has a clue what ‘dark energy’
may be (it is likely not reducible to any of our extant physical categories),
the idea that your destiny hangs upon the ratio of two of its purported
aspects does rather bemuse. Nevertheless, experts have been
able to conclude, that one of the following three fates await you, based upon
that ratio:
w > -1 : Temperature drops as universe becomes
virtually empty
:-(
w = -1 : Universe approaches a
constant temperature.
Intelligent life dies out.
Intelligent life dies out.
:-( :-(
w < -1 : Planets, then atoms, are torn apart.
:-( :-( :-(
Take your pick.
Meanwhile, shelter in place.
~
[Update] For more on "Astral Physics", try this scholarly contribution:
https://www.theguardian.com/tv-and-radio/shortcuts/2017/may/29/physics-casper-friendly-ghost-cartoon-twitter
“He exists both as a particle and as a wave,” proffered @stunt_penguin.
[Update]
https://www.theguardian.com/tv-and-radio/shortcuts/2017/may/29/physics-casper-friendly-ghost-cartoon-twitter
“He exists both as a particle and as a wave,” proffered @stunt_penguin.
[Update]
The pageview count on this blog has frankly been dismal of
late. In an effort to goose the
stats and attract roving eyeballs, we here publish the following sensational
astronomical discovery.
World of Dr JusticeTM discovers a new constellation!
The Astrophysical Squadron® of the World of Dr Justice© (headquarters: Geneva) has announced a
major new denizen of the night sky.
Already celebrated in physical circles for his discovery of the Higgs boson, the reclusive Doctor,
heading up a team of scantily-clad researchers at his mountaintop mansion, and
aiming up a supersized telescope (longer than yours), has revealed the following, slightly blurry but still
impressive astral image:
The new entity has been christened
the “Aurelie Delvaux nebula”,
after the noted Belgian astronomiss |
Using algorithmic filtering and in-silico techniques, the team
was able to evoke, from a seemingly random distribution of bright dots, an
outline that, seen from a certain angle and in a certain light, strikes some
observers as vaguely resembling a human female.
(Or perhaps a camel.
Yes, very like a camel. A Bactrian camel -- the kind with two humps.)
Thank you for renewing my interest in astrology.
ReplyDeleteNot *astrology*, dummy -- *gastronomy* !
ReplyDelete