Considering Evolution on Venus. (Anton Petrov)

One of the beauties of science is the fascinating surprises it keeps tossing at us.

New ways to think about old acquaintances.

I’ve occasionally watched videos by Anton Petrov on YouTube and so far I could recommend every one of them. He’s got a down home way about him that’s comfortable and I like the way he talks about science and describes his topics.

I’ve also liked Venus for a long time, since I was kid and all scientists had were educated guesses.

Lots of fascinating new chapters over the decades and increasingly complex and detailed understanding developing, with plenty of room for more discovers. (At least so long as humanity’s global house of cards holds together.) I’ve lost track of Venus, been seduced and distracted by Earth. That’s why watching this interesting video was like meeting an old friend, whom you look at in a new light. It’s also another one of those, why of course, how could it have been different. But it’s so nice for it go from pure imagination to stuff with a little data supporting the Physical Reality of the thing. Oceans on Venus, now one can almost imagine the fossils that will never be seen.

Fun shit. This is why some folks love Physical Reality, Evolution, Earth Centrism. ;- )

 

https://www.youtube.com/watch?v=lonB9NLBsQY

Hello and welcome! My name is Anton and in this video, we will talk about a new discovery that suggests Venus had liquid water and possibly a large ocean until about 715 million years ago - for billions of years! Paper: https://meetingorganizer.copernicus.o…

 

Enjoy, have a good evening.

Guess the planets in our solar system have become old hat, hoohum.

Still we can learn from history, human and natural.

https://www.youtube.com/watch?v=Jgs-5NlHfDU

I found some details to this story, get more interesting all the time.

 

Venus Could Have Supported Life For Billions Of Years. First Habitable Planet In The Solar System?
Sep 24, 2019 - Fraser Cain

After decades of research, including multiple landers and orbiters, science can definitively say: Venus sucks. Seriously, that place is the worst, with its boiling temperature, intense pressure, sulfuric acid rain, and more. But was it always this bad? According to new research from NASA and various universities in Sweden and the US, Venus might have actually been the first habitable world in the Solar System. And it might have maintained a reasonable climate for billions of years, finally rolling over into a runaway greenhouse effect just a few hundred million years ago.

 

https://www.youtube.com/watch?v=sB4XzrEv9dU

The sweet thing about my little diversion with Venus past few days is that it’s such a good reminder and example of how serious science actually works, as opposed to the showman’s make-believe contrarian-science.

When an outlandish statement is made - scientists (or communicators) can take a curious, skeptical, thinking person through the lines of evidence that lead to such and such a conclusion. Along the way teaching all sort of details, along with an awareness of caveats and limitations. It’s not a bunch of flimflam that depends on making clowns out of opponents while disregarding true evidence and facts, the way your contrarian is dependent on doing.

After listen to a shocking science tale, one is left with the knowledge to start doing a little homework, in order to support or dismiss what others told us. Collecting more information will either corroborate or challenge claims made.

Why do I trust it? Because the community of scientists had already been weeding out the trivial and incorrect from the factual and plausible. Doesn’t make it perfect - but it’s the way to do the best we can with what we have.

Sure beats faith-shackled thinking, with it palpable nonsense. Where someone, rather than a collection of evidence sets the agenda and anyone who doesn’t hold to that doctrine becomes an enemy, to be treated with extreme prejudice.

 

Astrophysics > Earth and Planetary Astrophysics [Submitted on 2 Aug 2016] Was Venus the First Habitable World of our Solar System? Michael J. Way, Anthony D. Del Genio, Nancy Y. Kiang, Linda E. Sohl, David H. Grinspoon, Igor Aleinov, Maxwell Kelley, Thomas Clune

Cornell University - https //arxiv org/abs/1608.00706

Present-day Venus is an inhospitable place with surface temperatures approaching 750K and an atmosphere over 90 times as thick as present day Earth’s. Billions of years ago the picture may have been very different.

We have created a suite of 3D climate simulations using topographic data from the Magellan mission, solar spectral irradiance estimates for 2.9 and 0.715 billion years ago, present day Venus orbital parameters, an ocean volume consistent with current theory and measurements, and an atmospheric composition estimated for early Venus.

Using these parameters we find that such a world could have had moderate temperatures if Venus had a rotation period slower than about 16 Earth days, despite an incident solar flux 46-70% higher than modern Earth receives. At its current rotation period of 243 days, Venus’s climate could have remained habitable until at least 715 million years ago if it hosted a shallow primordial ocean.

These results demonstrate the vital role that rotation and topography play in understanding the climatic history of exoplanetary Venus-like worlds being discovered in the present epoch.

Mysteries of Venus –“First Habitable Planet in the Solar System?” Posted on Jun 5, 2019 in Astronomy, Science - DailyGalaxy.com

https //dailygalaxy com/2019/06/hidden-mysteries-of-venus-was-it-the-first-habitable-planet-in-the-solar-system/

James Garvin, the chief scientist at NASA’s Goddard Space Flight Center, is convinced that whatever they find, whether is be that Venus was formerly an ocean world or that it’s tectonically active today, it will be “beyond our wildest dreams. We need to find out. Because she’s waiting to tell us something and I would hate to miss the boat.”

Momentum is building to explore Venus, in part because scientists say it could hold the secret to understanding what makes a planet habitable. “Venus is like Earth in so many ways,” observed Stephen Hawking. “A sort of kissing cousin. She’s almost the same size as Earth, a touch closer to the Sun. And, she has an atmosphere that could crush a submarine.” Venus today is a hellish abode where surface temperatures reach more than 400 °C and deadly clouds of sulfuric acid float through the sky.

“If researchers could decipher why conditions on Venus turned so deadly”, writes Shannon Hall in Nature, “that would help them to assess whether life might exist on some of the thousand-plus rocky worlds that astronomers are discovering throughout the Galaxy.”

So what went wrong with the once water-rich Eden? Although Earth and Venus began in a similar fashion” writes Hall. …