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As I noted in July, the support of my readers through the years has given me the freedom and ability to analyze objectively the ongoing renaissance in space, as well as the cultural changes -- for good or ill -- that are happening across America. Fourteen years ago I wrote that SLS and Orion were a bad ideas, a waste of money, would be years behind schedule, and better replaced by commercial private enterprise. Only now does it appear that Washington might finally recognize this reality.

 

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Study: Venus’ atmosphere too dry for life

The uncertainty of science: A new study has found that the amount of water in Venus’ atmosphere is too low to support the possibility of life.

On Earth, Hallsworth said, microorganisms can survive and proliferate in droplets of water in the atmosphere when temperatures allow. However, the findings of the new study, based on data from several Venus probes, leave zero chance of anything living in the clouds of Venus, he said.

“Living systems including microorganisms are composed mainly of water and without being hydrated, they can’t be active and are unable to proliferate,” Hallsworth said.

Studies on microorganisms living in extreme conditions on Earth found that life can exist at temperatures as cold as minus 40 degrees Fahrenheit (minus 40 degrees Celsius). For water activity, which is measured on the scale from 0 to 1, the lowest survivable value is 0.585. The water activity level found in the molecules in the Venusian clouds was merely 0.004.

NASA Ames astrobiologist Chris McKay, one of the co-authors of the paper, said in the news conference that the findings of the study were conclusive and the new fleet of space missions currently being prepared for Venus will not change anything about the hope for life on Earth’s closest neighbor.

McKay can be as “conclusive” as he wants, but that really isn’t how science works. While this data is very strong evidence that there is no life on Venus, a result that should be expected given its harsh environment, it can’t preclude for certain the possibility. You can’t prove a negative in science.

At the same time, this paper puts another nail in the coffin of that very weak result, since found even weaker, in September 2020 that suggested the presence of phosphine in the atmosphere that suggested the possibility of life.

Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 

The print edition can be purchased at Amazon. from any other book seller, or direct from my ebook publisher, ebookit. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.


The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
 

"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News

5 comments

  • Col Beausabre

    “Absence of evidence is not evidence of absence”

  • JhonB

    Well, maybe life as we know it. But not necessarily life.

  • We Are Borg

    The 800 – 900 degF surface temperature and an atmosphere comprised mostly sulfuric acid probably has nothing to do with it. A Russian lander / probe survived on the surface for about an hour before it ceased transmitting. Just saying …

  • wayne

    Tone is always very difficult in Text, but this McKay guy, strikes me as a bit arrogant.

    Related–

    (–warning; i have NOT watched this all the way through yet, just reviewed the intro. Lex always has good time-stamps. Do what thou wilt.)

    “Clara Sousa-Silva: Searching for Signs of Life on Venus and Other Planets”
    Lex Fridman Podcast 195 (June 27, 21)
    https://youtu.be/CGAvsmokB4c
    1:58:11

    (OMG,– she’s a “quantum astrochemist at Harvard.” -> co-author of the 2020 paper on phosphine…)

  • Questioner

    Private mission to Venus in order to find life in the clouds.

    “VENUS MISSION CONCEPT STUDY”
    Sponsored by the Breakthrough Initiatives
    December 10, 2021

    https://venuscloudlife.com/wp-content/uploads/2021/12/VLFReport_12092021.pdf

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