Tag Archives: ponderings

The Last Ecosystem

Fragments of ancient life, spotted by explorers in a new system..

I’ve been working on some more astrobiology art. It’s taken on a life of its own, and I have to say, I’m paying more attention to these images than my YouTube channel!

I’ve been enamoured lately of dead or dying worlds. A recent video on my channel talked about the amazing possibility of limestone fragments orbiting the white dwarf star SDSSJ1043+0855. Ever since reading of this it’s captured my imagination. The notion that life has existed long ago, possibly before life began on earth bears thinking about.

Limestone is a mineral produced primarily by organisms which produce shells, using a matrix that incorporates calcium carbonate. In the early days of multicellularity, as the predator-prey paradigm took hold of Darwinian evolution, an ancestor of today’s molluscs discovered how to make use of an upsurge in calcium levels in the oceans. It used it to produce a protective suit of armour. This trick was so successful that molluscs became incredibly abundant. So abundant, in fact, that their remains ended up as vast deposits of limestone.

To the present day.

Using spectroscopy, the three elements that comprise calcium carbonate: carbon, oxygen and calcium have been detected in the upper atmosphere of this particular white dwarf. By themselves they aren’t a smoking gun. It’s also fair to point out that limestone can form abiotically. Limestone deposits in subterranean caves are one example. However, the vast majority of limestone on earth is biologically produced.

The “limestone” orbiting this star is believed to be embedded in the fragments of a large rocky object. We know nothing about this world, only that it probably existed and (possibly) limestone comprised part of it. Is it a fossil, spotted across the light years by modern humans? How long ago did this world harbour life? White dwarf stars (which aren’t technically stars! Find out why here) have been discovered which are nearly as old as the universe.

Earth is 4.6 billion years old. What of the world currently being torn up by the immense gravity of this white dwarf?

Dead worlds could be scattered across the galaxy.

It would be interesting to look forward and see how our own world eventually will die. For now, this white dwarf star and it’s companions are a way to look ahead at what may befall us. It’s believed that eventually the earth will become incapable of supporting life, as the sun begins to undergo senescence billions of years from now. What iterations will the terrestrial biosphere take over such a vast stretch of time? Will life start over? Are these “fossil” fragments within this unnamed rocky world pieces of its last ecosystems?

What will the last ecosystem on earth be?

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Sailed the Ocean Blue

It’s been estimated that a good percentage of planets beyond our solar system may be water worlds.

We here on mother Earth like to think of our blue green marble as a water world. Indeed it is watery, and water is pretty much the reason anything lives here at all. That’s why astrobiologists naturally seek signs of water on exoplanets. “Follow the Water” is a central tenet in the search for extraterrestrial life.

But compared to some worlds, earth really isn’t that waterlogged at all. It’s 0.002 percent water by mass. Only a tiny fraction of that water is available to terrestrial life. That water which isn’t directly involved in biological processes is linked to them, linking life to the planet via seasons and climate.

Some exoplanets are believed to be up to fifty percent water! These are true ocean worlds. To date, up to thirty five percent of exoplanets larger than may be covered by vast layers of water that may or may not harbour life. The jury is well out on that, but the idea is intriguing (and tempting) as the traditional definition of habitable zones is being stretched and reinterpreted.

A water world with a thick atmosphere of steam.

For now, we have only our imaginations with which to explore these worlds…

An aerial view of remote coastline on a hypothetical watery exoplanet.

A new video!

Translations

More images.

I’ve been thinking some of these may look good as posters. Thoughts anyone? They provide another way to reach people, as I myself continue to explore and learn about a truly incredible topic.

I like the look and think my channel will finally benefit from a coherent look and vibe. The retro font works for me, and the surreal, fantastic feel of the pictures is my jam.

Channel News

A new video exploring the possibility of directly imaging exoplanets is coming very soon!

Here is a snippet; sans sound or effects just yet!

More coming.

Transition


Hi all. I haven’t put up a post in a few weeks. Sorry to anyone who follows this blog and enjoys my occasional rant. I have been in several states of mind about many things lately and they’ve all been taking me off my game. Personal issues and growing realisations about many aspects of my life and childhood have dissolved my focus. YouTube continues to be a struggle and source of frustration and almost daily I vacillate between continuing with it or giving it the heave ho.  


This indecisiveness and inability to properly process any defeat (no matter how trivial) makes me realise that life has damaged me a lot more than I ever realised. As a man I’ve been guided down the path of disregarding these things, but I do see that I think I’ve seen a little bit more catastrophe in my life than I’ve realised and it’s left it’s mark. 

It isn’t just the channel. I realised the other day whilst driving to work that one thing both of my parents failed miserably at was bolstering myself and my siblings. Dad was better at it than Mum,  but the one lease on that really stuck with me was the ability to easily accept defeat and be comfortable with a deeply sub par life.


My second wife has been instrumental in helping me see these things. She has fought tooth and nail, and has given her blood and guts (literally) to be there for me. Far more than any before her she has been steadfast and worked on bolstering me. With her help and perhaps a bit of therapy I can actually be what I’m supposed to be. I’ll make the channel work, but if it doesn’t who cares? Life’s too short to agonise about things that at the end of the day just don’t matter. 


Until next time, bringing you the Universe in plain human:

Ben.