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Post by haderic on Sept 28, 2007 16:25:31 GMT -5
Hi. I am new to this forum.
I love sunshine, i have seen it now 4 times.
But there is just one thing that bother me abut the movie.
What is the solarshield made of?
Any one have any ideas of what material can withstand 5,515 degrees Celsius?
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Starshine
Pilot
There will be nothing to show that we were ever here - but stardust.
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Post by Starshine on Sept 29, 2007 7:59:51 GMT -5
I think in this point the movie is a bit unrealistic. The sun corona has a lot of times higer temperature than the surface of the sun (scientists don't know why). So I don't know whether they could reach just the surface of the sun.
But the bomb has a very very high speed while flying into sun because there are 4 huge booster motors around the bomb. The shield just resist the sun-plasma for a few seconds, long enough to ignite the nucleus reaction. In this time the shield melts and burns away very fast. But it protects the bomb long enough.
I dont't think the shield were made off a particular material that resist 5000 °C, but it could be carbon, the melting point of it is 3550 °C.
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Post by cococi on Oct 1, 2007 15:01:53 GMT -5
when i saw solarshild i didnt knew what the thread was about  ) it's solarshield  yea i corrected u sue me ;D |
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Post by chero on Oct 1, 2007 16:10:54 GMT -5
when i saw solarshild i didnt knew what the thread was about ) it's solarshield yea i corrected u sue me ;D We are all aware of this, but since you mentioned it, I've changed it. There isn't much difference between "solarshield" and "solarshild" so I can't see any confusion. Thanks, TheHunter, for answering the very intriguing question. ;D |
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Post by haderic on Oct 2, 2007 7:14:02 GMT -5
No, it can't be carbon. Becuse the colest layer of the sun, the Atmosphere Is 4000 °C.
And carbon mellted at 3550 °C.
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Post by cococi on Oct 2, 2007 14:35:31 GMT -5
yea whell if u've payed attention to the movie u've realised that the sun "cooled down a lil " |
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Post by haderic on Oct 2, 2007 15:34:56 GMT -5
If the sun just cool of like 100 °C, it wuold have dramatical efekt on earth in the long run.
I dont think that the sun have colled of mutsh, just a litel.
(draving this conclusin of what i know of global warming.)
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Starshine
Pilot
There will be nothing to show that we were ever here - but stardust.
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Post by Starshine on Oct 3, 2007 7:56:57 GMT -5
^^No problem  A Space Shuttle has to resist "just" 1650 degrees while landing and the heat shild were stressed enough. So I dont know whether there exist a stuff that resist more than 4000 °C... But maybe they have a strong magnetic field onboard which protects the crew by blocking the dangerous space-particle-radiation. This field would stop the sun-plasma. The plasma would floats around the ship like the sun-winds floating around the earth magnetic field. This could work at the outer areas in the sun, but near to core the density of the sun is too high and the temperatures are about million degrees. But at the surface and a bit deeper it could work because the density there is lower than the density in our atmosphere!  |
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Post by haderic on Oct 3, 2007 8:13:07 GMT -5
That is a good explanation.
Thank you Hunter.
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Post by scmodstyle on Oct 3, 2007 16:58:23 GMT -5
In physics there are four types of heat transfer: conduction, convection, radiation, and phase change. These are the only methods by which the shield could be heated. en.wikipedia.org/wiki/Heat_transferSince the shield isn't touching anything hot there's no way heat could CONDUCT to it. Since space is a vacuum which contains no fluids or gasses to pass over and CONVECT heat into the shield. (we'll assume solar wind is negligible) Phase change is the heat produced (or used) when a material changes states between liquid, solid or gas. Obviously the shield isn't under going a PHASE CHANGE so we can rule that one out. Lastly we come to RADIATION which is transfer of heat by electromagnetic radiation aka infra red. If you're at an amusement park and a ride creates a fireball effect even though you're not touching the fireball, and air from the fireball never reaches you why do you feel the heat instantly? Because the fire produces infra red radiation that instantly travels across the room and is absorbed by your skin. Keyword absorbed. Much like a white roof reflects heat the RADIATION effect only heats objects that absorb the radiant energy. If the shield were constructed from some theoretical material that reflected 100% of the sun's radiant energy it would never heat up. |
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Starshine
Pilot
There will be nothing to show that we were ever here - but stardust.
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Post by Starshine on Oct 4, 2007 7:53:58 GMT -5
Yep, that's right. Energy transfer in space works normally just by electromagnetic radiation. That's the cause why humans don't freeze when they left a space ship without a suit because the body radiates very weak.
But the problem is what happens when Icarus enters the sun and it's atmosphere.
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timpsi
Trainee
I wanna fly to The Sun
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Post by timpsi on Dec 1, 2007 9:09:54 GMT -5
Yep, that's right. Energy transfer in space works normally just by electromagnetic radiation. That's the cause why humans don't freeze when they left a space ship without a suit because the body radiate very weak. But the problem is what happens when Icarus enter the sun and it's atmosphere. That would be very intresting to know, but I'm sure the solarshield was made of a material that we don't have at this time (assuming the movie is taking place at the year 2057), that might be one thing. But then, what happends when they enter the atmosphere and the sun? |
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Starshine
Pilot
There will be nothing to show that we were ever here - but stardust.
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Post by Starshine on Dec 1, 2007 14:38:20 GMT -5
The shield melts, but apparently that needs enough time to protect the payload until the explosion-sequence were initiated.
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timpsi
Trainee
I wanna fly to The Sun
Posts: 24
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Post by timpsi on Dec 1, 2007 14:49:00 GMT -5
Yes, the shield clearly melts and is destroyed. And apparently, yes, there was enough time to protect the payload so it could get to the surface and detonate. But still, there's a long way from the atmosphere to the surface =P
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Starshine
Pilot
There will be nothing to show that we were ever here - but stardust.
Posts: 297
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Post by Starshine on Dec 2, 2007 7:14:57 GMT -5
The bomb detonated inside the sun as I know. The q-balls which infected the sun are deep in it, probably in the core so the explosion has to take place as near as possible. I assume the bomb detonates somewhere between the core and the surface, at the outer areas of the sun.
The essential thing is that Icarus is extrem fast. I mean: huge g-force of the sun + 4 large power boosters around the bomb + start speed of Icarus.
Just the g-force of the sun accelerates the ship to this speed:
v² = g * h * 2
speed² = g-force * distance * 2
G-force of the sun= 274 m/s²
distance mercury - sun (Icarus flew around mercury and then straight to sun) = 28.955.000 km
274 m/s² * 28.955.000.000 m * 2 = (15867340000000 m/s)² = 3983383 m/s = 14.340.178 km/h
14,3 millon km/h !!! Because of this high speed they cross the surface and the atmosphere extrem fast. The shield and the bomb were destroyed by the hotness after a particular time but it goes so fast that the the shield doesn't get much heat.
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) it's solarshield 
