A Few Brief Martian Links

Why was Mt. Sharp chosen for the Curiosity Rover landing site, and what about those rounded stones that it photographed, indicative of long ago ankle to hip-deep water?  If the Martian surface is likely so full of perchlorates and life-hostile, irradiated soil, what are the chances of pockets of microbial life below ground?

The discussion later moves to Venus, Jovian moon Io, and the Chinese lander on the dark side of the moon in the final minutes:

Event Horizon discussion with Emily Lakdawalla.

As posted:

Imagine sub-freezing temperatures and free radicals bombarding the near atmosphere-less Martian surface (oxidized and rusted red, barren), but below the Martian surface lurk big blocks of briny ice; ice with freezing cold, incredibly salty water around them and maybe just enough O2 to support some microbes.

Worth thinking about.

What are you doing with your imagination?

‘Due to the scarcity of O2 in the modern Martian atmosphere, Mars has been assumed to be incapable of producing environments with sufficiently large concentrations of O2 to support aerobic respiration. Here, we present a thermodynamic framework for the solubility of O2 in brines under Martian near-surface conditions. We find that modern Mars can support liquid environments with dissolved O2 values ranging from ~2.5 × 10−6 mol m−3 to 2 mol m−3 across the planet, with particularly high concentrations in polar regions because of lower temperatures at higher latitudes promoting O2 entry into brines’

Jordan Peterson And Slavoj Zizek-Some Weather And Space Links

Challenges to many post-Enlightenment radicals, true-believers and narrow ideologues continue apace.  Hopefully, colonizing the Arts & Sciences for reasons other than making good art and doing good science will not come so easy.

Who’s got the Truth?  Who’s got the better models?

Jordan Peterson & Slavoj Zizek will be debating on April 19th:

On this site, see: Adam Kirsch responds to Zizek’s responses.  Kirsch reviewed Zizek’s In Defense Of Lost Causes in a New Republic piece entitled ‘The Deadly Jester.’

Interesting quote from Roger Scruton here:

So, what is all this Nothing-ness about? ‘My view’, says Scruton, ‘is that what’s underlying all of this is a kind of nihilistic vision that masks itself as a moving toward the enlightened future, but never pauses to describe what that society will be like. It simply loses itself in negatives about the existing things – institutional relations like marriage, for instance – but never asks itself if those existing things are actually part of what human beings are. Always in Zizek there’s an assumption of the right to dismiss them as standing in the way of something else, but that something else turns out to be Nothing.’

On that note, keep living a good life and keep learning:

Via Eric Weinstein, Science On A Sphere has got to be a dream of all weather and map geeks, no matter their level of commitment:

High-fidelity photographic images and satellite loops give you snatches of the bigger picture.  Get enough data sets and processing power together to build a basic model of Earth, however, and and you can start mapping months of actual data over the model.  Then you can start doing the same for other planets.

Perhaps with the cheaper availability of AI modeling, costs will come down enough to allow localized and predictive weather observations and modeling.  Amateur weather geeks can start adding input channels and competitive, real-time knowledge which strengthen and/or challenge the big models in real-time.

Engage your visual cortex along with actual recorded weather data.  Choose a particular weather event from your own memory, and align it with this visual representation of the data on the macro-level:

You probably already knew: If you keep scrolling out of Google Maps from your lat/long (https://www.google.com/maps) in satellite view, you will eventually see a similar Earth model.  You can then choose other planets from a sidebar if you can’t afford $45K!

I’ve been enjoying Event Horizon lately; good questions and good answers from Astronomers and serious practitioners.  Subscribe!:

Via A Reader-Two Oumuamua Links

Via a reader:  Hey, I’m probably not even an amateur.

Oumuamua’s Geometry Could Be More Extreme Than Previously Inferred

Recently, a visitor from beyond our solar sytem passed pretty closely to Earth.

With the observed and limited data, Oumuamua was clearly anomalous.  It likely had a 10/1 length to width ratio and was reflecting a lot of light, data which suggests a wobbling oblong or something nearly pancake-shaped (perhaps containing iron or other metals because it’s more reflective of the red, longer wavelengths on the visible light spectrum and it’s got to be of durable enough material to be so thin while surviving the roughness of interstellar space).

Our solar system is a fairly flat disk which is moving in relation to other star systems, all of which are traveling very quickly relative to Oumuamua, which was relatively stationary to these other systems when it came in at an angle to ours; speeding up again on its way out (perhaps not due to outgassing).

Dr. Avi Loeb has been working on lightsails, or thinking about how a civilization might travel and explore space and/or create something like a message in a bottle.   Below, he is interviewed on Event Horizon.

His not-ruled-out hypothesis will probably attract some UFO and alien public interest, but it seems, in my limited understanding, that as an anomaly, this is a discussion with a first-rate astronomer performing an interesting exercise in taking past experience, current knowledge and conventional explanations to their limits in trying to creatively identify something new.

It’s a big universe out there after all, and we’re just starting to get some better tools with which to view and understand it:

Robert Zubrin At The New Atlantis-‘Colonizing Mars: A Critique Of The SpaceX Interplanetary Transport System’Stephen Hawking In Cosmos: Some Reasons Why We Should Continue Space Exploration