[CWBP2] CWBP 2 : History of the world

[Azélor]

This is a brief scientific version of the genesis of the world.
I don't know if any civilization on our planet will know these details.
Maybe they could see the past with divinations spells or visions.

The star system was formed between 5 or 6 billion years ago. It had 2 stars.

The star our planet is orbiting now, the main star is a G star class like the Sun. The other star was an A star class. This second star was larger and heavier. What we now call today the main star was the smallest partner of the binary system at that time. The stars were further apart than they are today.

About 3 or 4 billion year ago, the largest star exhausted her main source of energy and became a huge red giant. Very bright and very hot. At that time, most planets of the system where devoid of life.

In the end, it collapsed into a smaller white dwarf, thus creating a planetary nebula. The nebula lasted for about 10 000 years. At the highest point, the nebula probably increased the temperature of the planet of several thousand degrees, making the outer layer of crust melt. With time, it cooled down and the system became colder, colder that he’s never been. This allowed our planet and possibly others to develop life form. The nebula caused a large thermal and geologic cataclysm. Time made these scars disappear on most places. New planets where formed in the remnants of the star and the others received a second life. The 2nd planet still bears the scars of that cataclysm even after all these years. It’s surface appear all twisted et deformed like a ocean that had frozen in the middle of a tempest.

Our planet whas exposed to the nebula particles for almost 10 000 years.

Idea: This exposure led to an accumulation of energy on the planet surface. Today, the material that was once at the exposed surface is scattered everywhere. Some of the material is relatively easy to access at some places. In order to do something with it, it need to be processed and that requires a large quantities. The rare property of the material is said to be worth the effort.

[moriturimax]

I just happened across this and thought, what the Heck, I'll throw in a duo-cent.

Could there be spots on the planet that are still connected to the nebula, some kind of streamers that aren't visible to normal means but provide some kind of magical/psionic energy to those who can detect them?

one example would be the different surface points can be instantly travelled to from any other point.

Cheers!

[Applejack]

How far apart are the stars?
The A type star's supernova has been extremely destructive from such a small distance.
The first planet will have been destroyed, the following planetary nebula could have created a new system though.
Also, Red Giants are rather cool instead of hot, would have been a Super giant by the way.
It's an interesting system.

The white dwarf remnant will have a mass roughly that of our sun, it will be barely visible during day,
due to its size and distance.
The nebula left behind by the what is now the white dwarf will collapse into a new star in approx. 100.000 years.
Let's say it's a K star, about half the size of our sun, a low mass star.
The K star is in a close, tidally locked binary orbit with the white dwarf, which, on its turn, is in orbit with our ''sun.''

''Sun'' and white dwarf orbit each other at a distance of 31 AU (Neptune's distance is 30 AU = 4.5 billion kilometres.)

The K type star is in close orbit with the white dwarf at a distance of 1 AU = Earth-Sun distance.
The stars are in a constant gravitational tug of war, so the planets orbiting the ''Sun'' cannot be too far,
or else they'll fall prey to the white dwarf and its companion.
The max distance from which a planet can have a stable orbit around the ''Sun'' will be somewhere
around the Asteroid Belt.
After a long while, the nebula particles, radiation, and overall chaotic meteor bombardments are over.
The system is stabilizing.
During its life planet 2 met another forming planet, resulting in a binary planet system with an average distance
that of the Moon-Earth. Approx.

The perigee (closest point to each other.) is 310.000 kilometres.
The apogee is 440.000 kilometres. Kinda elliptical orbit lol.
The 3rd planet which is in the aforementioned binary system is 3/4 planet 2's mass.
The large mass creates bigger tidal differences, especially at the perigee.
The swelling oceans mix more with each other and wash up on the land.
Life has better chances and develops faster than on Earth.
Both planets harbour oceans and develop life.
The second one faster than the 3rd one.

Planet 1 was destroyed (what you think?)
The remnants of the supernova's shock wave would have wrecked it.

later (during the second protoplanetary disk) it clumbed together and accreted more
mass from the nebula's particles. It's now in a very close orbit around ''Sun''
(Hot Jupiter type planet.) It's a gas giant and has half Jupiter's mass (More than Saturn).

For explanation: The White dwarf and the K type star are in a Moon-Earth like orbit.
The 2 of them are in a large orbit with the ''Sun'' type star.
The Sun star has 3 planets, the first one is the hot gas giant.
The other 2 planets orbit around each other like a Moon-Earth system.
Together they revolve around the Sun star.

From the binary planet's view, the K star and the white dwarf appear as a red faint dot during day time.
At night, it's by far the brightest object in the night sky. Quite considerably brighter than a full moon....
Any details on rotations, orbital times, and atmospheric pressures. etc are now yours to shape (Whoever yours is.)

PS: I like this. My own story features an earth-like planet that is in a circumbinary orbit around
two stars ( a G and K type) that are in close orbit.
From the planet's view the 2 always appear close, similar to the Tatooine Sunset.

[Falconius]

I don't know, this is Azelors realm of knowledge. The universe was gone through in extensive detail in the astrophysics thread (and perhaps elsewhere) here: http://www.cartographersguild.com/sh...ad.php?t=26067 I can't really recall what the various ebbs and flows were.

[Applejack]

My realm of knowledge too ehhehe. ahwooo
I like space stuff.

But anyway, the distance between the 2 stars isn't very important.
As long as the minimum is distance is around Uranus's.
As for planet 1, pretty sure the planet would be dead meat.
If any star within a 30 light years from us exploded, life on earth is
under serious, serious threat.

30 Light Years =
283,821,914,177,424 Kilometers

Planet 1 was roughly 150,000,000 kilometres (0,000016 Light Years) away from the exploding star.
Would have been decimated.
But the rocky remnants and the later planetary disk could have merged into
a Reborn Planet 1.

Thanks for the link, will check it out.