A few weeks ago I posted a blog asking one simple question ~ how can the ISS exist in the Exosphere if that part of the atmosphere is said to reach temperatures of 3000 degrees while the exterior of the ISS is made of a material that has a melting point of only 1200 degrees. I went further in that blog post to mention that the Exosphere is below zero on the dark side of the earth and 3000 degrees on the sun side. With that in mind I also asked how the ISS could withstand the constant fluctuation of those drastic temperatures every 12 hours as the earth rotates on its axis.
What I mean by that is this ~ metal is known to expand when it is heated and becomes dense when cooled. The constant fluctuation from hot to cold will eventually compromise molecular cohesion of the metals and the integrity thereof.
With this being mentioned, I would like to clarify that I was actually wrong in my assertion that the ISS would experience this fluctuation ONLY once every 12 hours.
Here are the facts: The current altitude for the ISS orbit is somewhere around 250 nautical miles above the surface of the earth. Given that altitude, the period, or time for one orbit is approximately 90 minutes. The ISS is going so fast that It makes an entire 360 degree rotational orbit in just over one hour. With a 90 minute orbit and a 24 hour day, the ISS will circle the Earth 16 times a day. That means 16 sunrises and 16 sunsets each and every orbital day for the last 10 years of said orbit.
Think about that for a minute.
You are telling me that the ISS cools in a nearly zero degree frame of reference and then begins to rise in nearly 3000 degree temperatures every 90 minutes and the constant fluctuating pressures of contraction generated by the heating and cooling of the component metals hasn’t caused the ISS to completely fall apart in orbit in 10 years as a result of metabolic destabilization?
Let’s set aside the idea that the ISS hasn’t completely melted (for argument’s sake even though it would under real world circumstance). Let’s assume for a moment that aluminum could withstand 3000 degrees. That wouldn’t change the fact that those materials would be under constant strain of depression and expanse every hour as the ISS orbited the earth reaching a total of 16 sunrises and 16 sunsets every 24 hours.
If it really is where they say, going as fast as they say, under the temperatures that they say, made of the materials that they say, (forgetting the fact that it would melt) how has it not fallen apart yet when you consider the physical properties of known metals here on earth and their metabolic reaction to the constant heating and cooling of the surrounding environment?
Apparently, the vacuum of space tells metal to act however it would like so long as it assimilates to NASA despite its apparent contradiction of the natural laws of physics and chemistry.
But what do I know, right? I’m just ignorant.
Final Note: So, what is the point of touching up on this topic if I have already posted about it in the past? The point is this; the fluctuations that I mentioned in my previous post are much more frequent than previously implied by an additional 15 times per day. Since when did science fiction become science fact?