Marvels of Space and Time…
[David Brin is an astrophysicist, futurist, best-selling author, tech-consultant, and speaker. David's international best-selling novels include The Postman, Earth, and Existence. To read more of David's blog posts, novels, and short stories, visit the Contrary Brin blog and David's website.]
Courtesy of David Brin, Contrary Brin
Let's take a break from the absurd reality show that is Earthly politics, and look instead skyward where — it seems every week, sometimes daily — we keep seeing fantastic evidence of what human civilization can do. Seriously, you readers who express fascination and pride, as you scan the wonders below… do you ever ask how you can be of the same species as our neighbors who spew hatred of science? Whose hearts have been hardened to such awe and beauty?
Even on the level of theology these things blare out what greatness we're beginning to achieve, and how blessed we are to be apprentices, understanding and learning and now practicing the craft of Creation.
Proselytize. I mean it. Make your neighbors lift their heads. Help them to see.
Magnificence
Jupiter: Juno Perijove 06 from Sean Doran on Vimeo.
Simply stunning. An unprecedented video stitched together from Junocam pictures as our probe's ellipse takes it diving toward one pole of Jupiter to skate over the cloud tops and race by the other pole, almost touching the stormy vortex before plunging back out again. The embellished addition… "Atmospheres" from 2001 a Space Odyssey… adds to the awe.
The Solar Probe Plus (SPP) mission will dive into the Sun’s atmosphere. Dive… into the sun. The first ever mission to get near the sun, is set to launch by summer 2018. The spacecraft will go into orbit within 4 million miles of the surface of the sun. Behind a carbon composite heat shield, the solar powered mission will pump heat to radiators… conceptually related to the technique that I wrote about in… Sundiver.
In October 2022, as a binary pair of asteroids makes an approach near Earth, NASA will launch a refrigerator-sized spacecraft to strike Didymos Bat 3.7 miles per second. Scientists will study the impact and the effect is has on Didymos B’s orbit around Didymos A, to determine whether this technique is a feasible method for saving the planet from asteroids that could otherwise have devastating impacts. Doing this near Earth allows precise radar measurements. Still…
Born as twins? New evidence suggests that most star systems probably begin as binaries that then either draw together or drift apart.
A galaxy with two – count em – two supermassive black holes orbiting each other. Long predicted, and now discovered. Wow.
Astrophysicist and author Ethan Siegel offers up a brief essay on Forbes about our need, in less than a billion years, to start moving the Earth outward, to keep it habitable at the Sun continues to warm. Ethan describes the energetics problem fairly well… but doesn’t offer even a smidgeon of an idea of how this mighty feat might be accomplished. Fortunately… I do.
There may be 10,000 hypervelocity blue stars that escaped from the Large Magellanic Cloud (LMC) when their binary companions exploded. That velocity, added to the speed of the LMC itself, could account for their blazing sprints, and why we spot them along a general line leading from the LMC to the constellations of Leo and Sextans. Since blue stars only have short lives, this means there may be up to a million of their remnants — neutron stars or black holes — speeding along the same general path.
Ohy, but our dreams will face obstacles and challenges to overcome. It seems increasingly likely that the surface of Mars is rife with perchlorates, which, when heated or exposed to UV, are really harsh on living organisms. “The Martian” would need a lot more water, just to clean his soil.
Okay so it pays to wear a variety of hats. In my role as a chief cataloger of hypotheses to explain the “Fermi Paradox” (the puzzling absence of any clear sign of extraterrestrial intelligent life, or ETI), I hadn’t registered on my list the “aestivation hypothesis” – that a sapient species might choose to shut down and hibernate for billions of years, until the cosmos has cooled sufficiently for optimized computational efficiency.
This notion – offered up by three brainy dudes I know well: Anders Sandberg, Stuart Armstrong and Milan M. Cirkovic – posits that most ETI would care about little else than optimizing computational ability, and hence would nearly all make this choice, rather than while away during the inferno heat of today’s epoch. That’s our current … um… 2.7 degrees Kelvin of the cosmic background radiation temperature, less than three degrees above absolute zero. See their explanation FAQ. And George Dvorsky’s excellent Gizmodo summary.
Now our computerized sharing and processing systems are on the verge of a new, exponential leap. If Dataists are right about this then, according to Harari, "homo sapiens is an obsolete algorithm," — as discussed in his latest book Homo Deus: A Brief History of Tomorrow.
1) In his epic tome The Physics of Immortality, the brilliant Tulane physicist Frank Tipler offered a stunning, baroque, complex and enticing (and Hugo Award-worthy) view of a far distant era when (hypothetically) the entire known universe comes back together into a Big Crunch. (This notion of an Big Anti-Bang, which for a decade had been thought extinct, is now being revived in new versions of the Cyclical Universe. Really? My head spins.)
Naturally, I have a story about that
I mentioned wearing many hats. Well, as an astrophysicist and SETI scholar, I had not considered the aestivation possibility. On the other hand, here’s an extract from my (Hugo winning) 1985 short story “The Crystal Spheres" (from The River of Time):
Better, by far, to stay young until the universe finally becomes a fun place to enjoy!To wait for that day, the races who came before us sleep at the edge of their time-stretched black hole. Within, they abide to welcome us; and we shall sit out, together, the barren early years of the galaxies.
And more wonders?
I’m not quite so quick to utterly dismiss the idea. The ionized tails of comets are pretty fierce and occasionally do emit noteworthy radio. Still, radio astronomer and SETI pioneer Dan Werthimer says: “the wow signal was almost certainly RFI (Radio Frequency Interference from man-made sources) modulated in power that happens to be close to the beam pattern response of the telescope. We see these signals all the time.”
In other words, this widely circulated “paper” offers an initially cool idea that fails to rise to the “5% plausible” test. Experts aren’t always right and minority-impudent theories are fun, even occasionally correct. I concoct plenty of em! But this is one that bears lots more burden of proof than is being met.
And finally
On June 3, 2017, a mysterious U.S. spy satellite did a close flyby of the International Space Station.
And finally… ah, sci fi. This is tasty cover art (by Steve Stone) for The Winds of Dune by Brian Herbert and Kevin J. Anderson. But argh, can we think a little? Commenter Mike Gannis asks:
(1) Look at the woman's shadow. Look at the illumination of the moons. Where the hell is the sun?
(2) The moons might last as long as five or six orbits before one either is ejected or crashes into the planet.
Still, there's a level where you answer… who cares? It sure is pretty.
Visit David Brin's Contrary Brin blog, website, biography, books/novels, and short stories. David Brin's nonfiction book about the information age –The Transparent Society – won the Freedom of Speech Award of the American Library Association. Check out his stories and books.