Who’s Out There?—Anywhere?3 min read

In the Milky Way, Kepler data point to stars with planets smaller than Neptune orbiting in the liquid water zone. There are at least nine so far, larger than 1.2 times the diameter of Earth, smaller than Neptune,
and probably rocky. Hence, the probability that we are not alone keeps rising, as it does when we consider various scenarios unlike Earth’s.

For example, a small star about the size of Jupiter, only 39 light years away in the constellation Aquarius, has three planets orbiting in the “habitable zone.” Their orbits are 4 to 73 days long, so they may be stuck with one side facing their small sun, which would make an intermediate zone quite permanently temperate. The questions then arises—how old is the sun and how long has the planet had temperate
zone?

Of course, those not the only questions to ask. Here’s another idea recently proposed by Joann Wendel of NASA/Goddard/SD May 23, 2016: She suggests that Earth managed to jump-start life because solar flares were “…bombarding Earth with energetic protons and radiation much more frequently four billion years ago. The early sun was not very bright, but the flares may have heated the Earth enough to keep water liquid and charge its atmosphere’s chemistry, forming organic molecules out of simple inorganic substances. Hence the prospects for life emerging on planets orbiting young stars are worth considering.

When solar flares were applied to a model of Earth’s very early atmosphere (Nitrogen2, carbon dioxide, methane and water vapor),  ionized atoms tore apart those substances, making them much more
reactive. Hydrogen cyanide could have formed and reacted with water to form “…molecules necessary for life.” These include amino acids, the complex sugars required by nucleic acids (RNA and DNA), and nitrous
oxide. The latter could have warmed the atmosphere.

Thus, perhaps suggested, the phrase habitable zones of habitable exoplanets should be changed to biogenic zones, where water stays liquid and the atmosphere is energized to make the biomolecules of life.

Another question to ask is whether plate tectonics is required for life to evolve on a rocky planet. It certainly helped Earth along. Plate tectonics kept our climate temperate by cycling carbon. Also, cold slabs
still cool the interior and help maintain the magnetic field, while “…subducting heat from the core.” Thus climate, mantle and core have made life possible here, suggesting that plate tectonics, temperate climate and magnetic fields are “necessary for life.”

The role of radiation could also play a role in creating life.  Jupiter’s radiation could split water and excite hydrogen and oxygen reactions, perhaps in the surface cracks of Europa. They run deeper than Earth’s and dark ones could be sea salt.

READ MORE:  'ISS Cribs': An Astronaut-Guided Tour of the Most Amazing House Ever Built

Finally, the role of caves in aiding life’s emergence was suggested by an article in EOS April 15, 2016. “Planetary caves are practically everywhere…” as are vents and fissures associated with water ice plumes on the moons of our solar system planets. Cave-like features provide subsurface access to 2000 Martian and 200 lunar locales. The hunt is on for “biosignatures” in such places. Let’s hope we can come up with the money to arm our instruments with the tools suggested by astrobiologists: mass spectroscopy, laser-induced breakdown spectroscopy, energy dispersive spectroscopy, and visible spectrum cameras for use with cellular automation algorithms. Stay tuned.


Author of The Archives of Varok
The View Beyond Earth (Book 1.)
The Webs of Varok (Book 2.)
Nautilus Silver Award 2013 YA
ForeWord IBPA finalist 2012 adult SF
The Alien Effect (Book 3.)
An Alien’s Quest (Book 4. coming in 2016)

Excerpts, Synopses, Reviews, On Writing, Characters and More-
ArchivesofVarok.com
Reviews of significant books- www.goodreads.com/Cary_Neeper
How the Hen House Turns- www.ladailypost.com
Complexity, Bio, Bibliography and Links- caryneeper.com
Astrobiology– astronaut.wpengine.com search:Who’s Out There

SHARE THIS POST
Love
Haha
Wow
Sad
Angry

Cary Neeper is an avid student of complexity theory, sustainability, steady-state economics, and the impact of cosmology on issues of science and religion. She grew up in the foothills of Hayward, California, where she helped rack dried fruit on her father’s 40-acre apricot ranch. After studying zoology/chemistry and religion at Pomona College and medical microbiology at the University of Wisconsin, she moved with her husband to northern New Mexico, where they raised their family. The Neepers still live in the Southwest with a friendly menagerie of dogs, fish, chickens, geese, ducks and a turkey called Little Bear. Cary plays string bass with local folk, symphony and jazz groups and tennis with local retired physicists. She paints landscapes in acrylics, including the cover art for her first Penscript title, The Webs of Varok. Cary's first novel and Webs of Varok prequel A Place Beyond Man was originally published in 1975 by Charles Scribner’s Sons, Dell, and Millington, London. Cary re-released A Place Beyond Man as an Author’s Guild Backinprint edition, now available from online booksellers. Its themes of sustainability and interspecies cooperation have now grown into new adventures for its human, elll and varok family as they travel the alternate 21st century Solar System in the five-volume Archives of Varok, coming from Penscript Publishing House in 2012–2014. Cary’s other works include two musical science fiction comedies “U.F.F.D.A.!” and “Petra and the Jay,” as well as newspaper and magazine articles, essays, short stories, and book reviews for The Christian Science Monitor.

You may also like...

Subscribe To Our Newsletter

Join our mailing list to receive the latest news and updates from Astronaut.com.

You have Successfully Subscribed!