Can't believe nobody did this (or posted it)!

[chew]

Hi all

My first time here!

My first thought on trying Universe Sandbox was: I wonder what it will be like to reproduce that famous scene from 2010 (the film, not the year where Jupiter turns into a new sun [henceforth called "jSun"].

I did a little online research and took the first answer I found for a theoretical mass increase of jSun (x80 Jupiter's mass) - someone's theory, talking about the film.

I didn't have time to watch the sim for more than 130 years (because of the time-step problem) but saw at least two asteroids thrown out of the solar system safely and a third brought into close orbit with the Sun. jSun changed it's orbit and the projected path of the Sun seemed to be attracted towards jSun.

What do people think?

A question: does the multi-core support have much effect? I have a six-core CPU but see no performance increase.

Cheers

Chew

[Sycosys]

Multi processor support is not yet implemented, the option is just there you know it is coming.


I have been mostly playing with pool ball/dice  systems..

[Ramierez]

I hope the Earth was on the other side of the regular Sun when you did that lol.  Another yellow dwarf (probably even a red dwarf) that close to us would basically be the end of us and probably the entire solar system.

Jupiter is already the big brother of our system...if it were to get too big, then most stuff (especially the inner planets) would get either a nice firey death, or a trip to the great unknown. 

[chew]

Hi

Hehe, or LOL!

Actually, I ran this sim for 130+ years without seeing problems crop up for any planet! I need to check whether the Earth actually moved out of the Goldilocks Zone or not before stating confidently that Life on Earth wasn't affected.

Cheers!

[MassiveEffect]

Hi all

A question: does the multi-core support have much effect? I have a six-core CPU but see no performance increase.
Chew

The Multi-core option seems to help me with dust and setting the dust multiplier much higher than normal.
I'm on a quad for now.

[echo17]

Just looked at the numbers for the distance between us and Jupiter and us and the Sun, we are closer to the sun than Jupiter so if it did turn into a star at minimum an F class star (would have to gain a lot of mass to become anything bigger) we'd still be ok

[chew]

From the sim I am running, I'm seeing a significant perturbation in the sun's orbit around the galactic hub, after the advent of the jSun. Much more than I'd expect; perhaps it's something to do with the overall mass of the solar system.

The other thing: in 2010, at least Europa is still there after Jupiter becomes jSun. I can't see how this could happen - in all my simulations, most of Jupiter's moons pretty much immediately dive into it's central mass. Ergo, the power that increases Jupiter's mass must do something funky with Europa's orbit.

[echo17]

Or the simulation isn't perfect as far as some of those things are concerned >.<

[Omnigeek6]

I just tried this! 

@chew:

That makes sense to me. Increasing an object's mass 80fold without changing the velocities of its moons would resulting in the moons gaining very high eccentricities, such as ones which would result in impact with the primary. Besides, even if the velocity was changed, Io would be torn apart by gravitational tides. Also, due to being less than 0.02 AU from a 3000 kelvin, 0.08 solar mass star, the surviving moons would be subjected to radiation and tidal heating which would quickly boil off all their volatiles, leaving Ganymede and Callisto at only half their present masses. Europa would lose less mass comparatively, but any life it had would be toast, and taking into account both radiation and tidal heating, it would probably end up as a huge, elongated droplet of magma flying around Jupiter once every 8.79 hours.

Life on Earth would be VERY affected. Even if it stayed in the habitable zone (which it might not do over millions of years just because it did over a few hundred or thousand), Jupiter's new high mass would scatter the asteroid belt in all directions, subjecting Earth to a cosmic firing squad. Over the next few million years, repeated asteroid impacts (picture being hit by a hundred asteroids as large as or larger than the K-T impactor, each coming in just when the affects of the previous ones had worn off. Also, there would be plenty of smaller, but still city-destroying impacts thrown in as a side bonus) would at the very least kill off the vast majority of species on Earth, including possibly all multicellular life outside the oceans. If we got really unlucky and a really big asteroid hit us (such as Vesta or Pallas) our planet would be completely sterilized.

[ashley_au]

For that added authentic touch, I've requested the inclusion of a Jupiter monolith.

From the feedback contained here https://spreadsheets.google.com/ccc?key=0AoYA02Dt7PgRdDRyU08yTlNOZ1QzUUlDZU9MNmEyZ1E&hl=en it looks like I'll get my wish too!

Great moment though, wasn't it  

[chew]

Yes, a great moment indeed. I think Europa's orbit must have been adjusted - I'm going to work out how wide it needs to go and (very) roughly how fast it would need to adjust. Perhaps just(!) increasing it's mass would achieve an orbit shift.

wts

Btw I saw your request for the monolith a while ago and added my vote to it.

Btw#2 been loving Jupiter's presence in the night sky recently. Watched is for months, even when on hols in Florida

[karakris]

For doing the Jupiter Sun from 2010 -

You SHOULD able to just increas the Temperature until you get Fusion. I got the impression from the Film, that the size was not changed - when Jupiter turned into a "mini sun".

I know this works for a White Dwarf - in the "real world".  They can be as low as 1 times Jupiter Mass up to 80 times.  Over 80 Jupiter Mass and they go Nova - quickly.  However, real White Dwarfs are always the same diameter - regardless of Mass, but are 15,000 degrees C at the surface.

So for 2010 - you would want something cooler - a Yellow or Yellow-Orange mini-Star.  Yeh - we would have to set a Star and reduce the Mass whilst keeping the Temperature and colour right.
Not sure if Un Sand lets you do that.

I get my Star Info from Wiki BTW.  Not great, but handy.

Any ideas - or any Comments ??