First Great Solo Expedition

It started as a joke. A cheap jab at the First Great Expedition, fueled by the necessity to make fun of anything so large and successful, particularly because i knew I couldn't take part with my work/family schedule that leaves few hours of playtime. But it took off anyway and I've come to enjoy it and it has become my main focus when I play.

I set myself goals, travel, take the odd screenshot, upload it to facebook with some insights and a bit of science.

Here's some examples:
The Milky Way as represented in Elite:Dangerous. The procedurally generated galaxy shown here has 400 billion stars. The known stars and exoplanets (and new discoveries) are added by hand. But that represents an incredibly small number of the total. The rest are 'predicted' using complex algorithms and generated by a piece of software called the Stellar Forge. It basically runs the history of the galaxy through 14 billion years of stellar evolution.

The Milky Way is a barred spiral galaxy and is known to be larger than average. I love the fact that in a billion years time it will collide with its closest neighbour Andromeda. Will our descendants (no longer human, but of human origin) still be around to see it. I hope so.
milkyway.jpg
This is an L-Class Brown Dwarf Star. The most surprising thing to notice about Brown Dwarfs is that they are not actually Brown. Like all colour the distinctive colouring of the star comes from the light it's emitting. In this case from Iron Hydride and Chromium Hydride. When I was a child I imagined that Jupiter was 'almost' a brown dwarf. This isn't quite true, but it is romantic to me for some reason. I wish brown dwarfs got more love from we explorers. The first star of this type was discovered in 1988, but wasn't properly understood until a few years later the L Class being designated to fit it, which is GD 165B about 103 Light Years from Earth. This star here is a little bit further away... just under a thousand light years away.
browndwarf.jpg
This world is about the same size and weight as the Earth and only a little hotter. The atmosphere is nitrogen and oxygen like ours. But that difference in temperature (330k vs 280k on earth) means a whole 50 degrees difference which explains why there's no oceans given the pressure is also similar to Earth. I'm also interested in the atmophere here, you can see the storms. There were more on the whole globe which I didn't get in the image. It's the sort of planet I'd love to get down to explore.
hotearth.jpg
An Ice Planet we've discovered, it's just under 8 times the mass of Earth and its diameter is more than twice as large (which fits mathematically, so the density must be around the same, maybe a little under). It's in a nice system with a few metal rich planets and brown dwarfs. The atmosphere is helium (really rare on our planet, to the point of not existing, we really shouldn't be using it on kids balloons) with some hydrogen and neon. It has a beautiful ring system I'm only hinting at here, as we know by now, probably caused by a moon getting too close.
icerings.jpg
Milky Way Makes Joke
I'd actually made my post for today. But I wanted to do a little bit of exploring before turning into my bunk for the night. Things aren't as they appear. Yes, this is a gas giant. Type I, of the same family as Jupiter in our solar system. But it's only 1.25 times the mass of Earth. One point two five. Consider Jupiter is 317 times the mass of Earth. So this gas 'giant' here is only about one third of a percent the mass of our own gas giant. But the strangest thing going on here is that this gas giant is actually a moon of an ice planet that's thirty two times the mass of Earth. The Milky Way made a joke. Normally ice planets (like Europa and Ganymede and others) orbit gas giants as moons. Here we have the opposite. It's the first time I've ever even heard of something like this. I love how the Milky Way surprises me out here.
babygas.jpg

Enjoy, and if you want some more, follow me on facebook.
 
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Big moment for the Saviour's Run and her crew. We found a neutron star! Unfortunately someone else has made it here before us (congratulations Cmdr Ritchie!). Neutron stars are created when giant stars go supernova. They're called neutron stars because they're composed mainly of neutrons. With neutron stars we're out of the realm of normal stellar evolution and quantum mechanics and that family of physics begin to become known.
Everything in the universe is drawn to everything else and really really wants to collapse. The reason you don't collapse into your chair and the centre of the Earth is the electrons in your butt are repelled by the electrons in the chair. The electrons in the chair are repelled by the electrons on the floor. And so on. This is regular physics and involve reasonably understood principles going back to the greeks rubbing amber rods and making people's hair stand on end and running away thinking it was funny.
Neutron stars are so tightly compacted that sort of physics doesn't work. As the star collapses electrons just sort of give up and combine with protons to form the neutrons (they have to come from somewhere). This is neutron degenerate pressure. It's like above but instead of electrons repelling now it's neutrons. It's why the pressure inside a neutron star is beyond anything we can imagine. The star pictured here is twice the mass of our sun, but far far smaller than our Earth. It's heavy.
Neutron stars can only be created by stars bigger than our sun. Our own yellow friend will eventually become a white dwarf.
neutron star.png
 
It really did go that way, it's been a lot of fun. I notice I play more when I'm 'out there' than when I'm back in civilisation as well. I'm just more driven.
 
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You can see the planet in the background as the Saviour's Run orbits the moon in this strange system. I might have passed them by without further notice if the data I got from my scans hadn't rung a bell. The planet is a regular high metal planet, but what struck me as odd was that the moon was 1/3rd the diameter of it's planet, but its density was considerably less than I might have expected.

It was familiar. The numbers don't quite match, but overall the relationship of this satellite with it's parent planet is eerily similar to that of our own Earth and our good ol' pal The Moon. The. Our oldest friend who's been with us since the First Day, because she was created alongside us.

Current theory states that a planet the size of Mars, nicknamed Theia collided with Earth 1 and our own satellite is the result of the debris field left after that impact. It's part of why it's so 'light', it's core is smaller than we might expect, similar to this satellite I'm orbiting here.

I propose that this satellite was formed by a similar mechanism, at some point in the past of this solar system, this planet had a catastrophic collision with another planet and this satellite is the result of that collision. I'd need mineral analysis to confirm that hypothesis though.

It's nice to see the simulated galaxy throwing up stuff like this. It doesn't seem to be that common, but it does happen.

Sadly the planet isn't terraformable and has no life of it's own. Recommendation: Mining colony.
 
Really nice posts Jeff. Just 1 thing though (probably a typo): ..."400 billion years of stellar evolution"... The universe is "only" 14 billion years old
 
Really nice posts Jeff. Just 1 thing though (probably a typo): ..."400 billion years of stellar evolution"... The universe is "only" 14 billion years old

Yeah, I have a bad habit of writing these at 2am... confused the number in the simulation with the age, don't worry I do know usually (invert the ol' hubble constant!)
 
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A close up of the inner-most rings of a gas giant. It's nice because you can see here two different types of rings. On the right we have a ring made of rocks. It was probably a small moon. Tidal forces from the planet acting on it eventually was too much to hold itself in a stable form and was torn apart.

The same process was at work on the creation of the left ring here. The difference here was the body was made of ice, possibly an ice moon, bigger than the rock moon, but the density was possibly quite similar. Moons aren't the only candidate, they could just as easily have been a captured asteroid on the right and a comet on the left. I'd need to do some chemical analysis to check.

The process by which rings are created happens when a body comes into this point where they're no longer able to hold together into a single body and are torn apart. There's a calculatable distance for this which depends on the size of the planet, the moon, asteroid or comet and its mass. So it's different for every pair.

The most famous example of rings in our solar system belong to those of Saturn (though the other giants have less spectacular rings), which may be as old as the planet itself or as young as 100 million years. The judges are still out on this. We know that inside the rings particles clump together to form rocks, then boulders, the boulders collide again and go back to particles. This could be the process that allows the rings to 'stay fresh' giving a deceptively young appearance despite a possible old age. Better than any facelift!

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Have I gone home? No, we're about 3000 LY from the cradle of humanity. And this is yet another Water World I'm orbiting. But the view with this planet's moon was very homelike. I stayed for a while.

The size of this moon is smaller and closer to its parent world than our own satellite. The visual effect here is entirely psychological and not backed up by the science. Still it was nice to see.

Our moon is relatively large compared to our Earth and has had a large effect on the history of the evolution of our planet. It stabilises the Earth's axial tilt, it keeps a nice bulge of oceans around the equator (the sea level would be higher in places like London or Sydney if the Moon suddenly disappeared). At times it's also acted as a shield, taking impacts that might have destroyed life on Earth if they'd hit.

This satellite hasn't had the same effect on its planet, but still, it looks enough like home to refresh the soul.


earthmoon.jpg
 
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