Great Idea for Space!!!

[smithdl]

Radiation is one of the 3 ways heat is transferred.  In outer space, since there is no matter, heat can not be transferred by conduction or convection, so radiation is the only way it can transfer.  Without an Atmosphere, as our asteroid in ONI, the surface will radiate all of its heat off.  The surface will be freezing!  Until the sun comes on it, and then it will heat up from the radiating heat from the sun, and without the atmosphere to buffer, it will get crazy hot!

Lets look at the moon.  The moon's "day", or period of time it is in the sun in one spot is 13 and 1/2 earth "days".  During that time, the sun radiates more heat to the moon than the moon can radiate off, and so the temperature increases to 127 C.  During the moon's "night", (same 13 1/2 days obviously) the moon only radiates heat away from it and the temperature reaches -280 C.

The reality is that if you were in space on an asteroid without an atmosphere, although you would have intense heat issues when the sun is on you, the bigger problem would be the cold.  Space is freezing cold, unless your in the sun.  So where is this asteroid?  Regardless of where, the temperature should be CONSTANTLY changing on the surface.  If it is only facing the sun, then constantly rising.  But if like most things in space it rotates, then you should get crazy temperature swings.

So, here is my idea.  Give space a rotation, say 8 cycles, whatever, with the sun.  During the day, all tiles with a "space" tile next to them, (not vacuum, space) would gain a certain amount of heat energy per cycle, enough to raise the temp for -280, to 127.  Maybe not identical to the moon, but it should be drastic as that's how space really is.  Then, at night, do the reverse.  Delete heat at the same rate on all tiles next to "space" tiles.

This could create all kinds of ideas, like using it to cool water during the night, or create steam energy in the day, or whatever.  Maybe slow down the meteor showers a little so the space area gets more use.

Ps.  Meteors and asteroids are generally very cold.  Heat comes from the atmosphere friction, and our asteroid has no atmosphere.  So...   ya, you should stop making asteroids 500 degrees, that is like crazy dumb.

[Saturnus]

Pretty sure this belongs here instead

https://forums.kleientertainment.com/forums/forum/133-oxygen-not-included-suggestions-and-feedback/

[smithdl]

I want to "generally discuss" it before I make a suggestion to the developers.  But thanks for looking out!

[goatt]

I like the idea of radiation. However, I this will be a new game mechanism to implemennt. If surface tiles have radiation, then all the tiles should be able to exchange heat with environment with radiation, that means vacuum can no longer isolate heat. I think it will somehow conflict/replace some of the existing game mechanism, it feels really hard to make it happen.

[SeeHam]

FYI, -273.15 °C is absolute zero, -280 °C does not exist. the temperature on the moon's surface when not facing the sun should be -173 °C and heating up to 127 °C while it is facing sun.

[Sasza22]

1 hour ago, goatt said:

If surface tiles have radiation, then all the tiles should be able to exchange heat with environment with radiation, that means vacuum can no longer isolate heat. I think it will somehow conflict/replace some of the existing game mechanism, it feels really hard to make it happen.

I think it would be best if they implemented a simplified radiation mechanic. Only place it is actually relevant is space, all other places can be handled the regular way. So if a tile is "exposed to space" it should radiate heat based on the time of the day. Getting cold at night and hot at daytime. Possibly could also consider the amount of space tiles it "sees" like the telescope and meteor scanner just so it`s not a super easy heat sink.

[goatt]

8 hours ago, Sasza22 said:

I think it would be best if they implemented a simplified radiation mechanic. Only place it is actually relevant is space, all other places can be handled the regular way. So if a tile is "exposed to space" it should radiate heat based on the time of the day. Getting cold at night and hot at daytime. Possibly could also consider the amount of space tiles it "sees" like the telescope and meteor scanner just so it`s not a super easy heat sink.

I understand what post is suggesting. And I also think it's doable. But I'm saying if such a thing exists, people like me will start to say that it's conflicting to existing system (or breaking the system further), and it's inconsistent cuz you have to treat exposure tiles differently blablabla.

[smithdl]

On 9/29/2018 at 5:39 AM, SeeHam said:

FYI, -273.15 °C is absolute zero, -280 °C does not exist. the temperature on the moon's surface when not facing the sun should be -173 °C and heating up to 127 °C while it is facing sun.

You are correct, I use F while I play and I got the to switched around when I posted.  (I know most people prefer C).  a

 

On 9/29/2018 at 5:32 AM, goatt said:

I like the idea of radiation. However, I this will be a new game mechanism to implemennt. If surface tiles have radiation, then all the tiles should be able to exchange heat with environment with radiation, that means vacuum can no longer isolate heat. I think it will somehow conflict/replace some of the existing game mechanism, it feels really hard to make it happen.

Heat transfer should be scraped and started over though.  It doesn't make sense at all with how heat actually works.  Either that or the developers need to explain better how heat is suppose to work in there reality.  (ie, we want you to delete heat with fixed outputs)  Heat moves primarily through radiation, its how heat works.  

[goatt]

I have a feeling devs won’t choose to scrape heat transfer mechanism and start over.

I think current heat transfer mechanism is straight forward, it’s by conduction and only by conduction.

what do you mean by “delete heat with fixed output”?

[nvzboy]

5 hours ago, smithdl said:

 Heat moves primarily through radiation, its how heat works.  

That is just plain not true. At room temperatures the contribution of radiation emitted from an object is negligible compared to heat transfer through conduction and convection. As a rule of thumb radiation starts to contribute significantly at temperatures of 400°C and up.

On 28-9-2018 at 6:41 PM, smithdl said:

Ps.  Meteors and asteroids are generally very cold.  Heat comes from the atmosphere friction, and our asteroid has no atmosphere.  So...   ya, you should stop making asteroids 500 degrees, that is like crazy dumb.

It actually is not a dumb thing. When objects impact with one another (unless they show absolutely no deformation and thus just bounce off one another) that kinetic energy is converted to heat. Given that objects in space can move at relative speeds in excess of several kilometers per second, It therefore makes a lot of sense for such amounts of kinetic energy to cause a significant heating when a meteor impacts.

Just setting some facts straight here so we don't lose track of what's actually hapening in real life. But should this simulation include radiation as a form of heat transfer? In my humble opinion it will work fine without. Currently it strikes a nice balance between being understandable by people who don't have backgrounds in exact sciences and having enough depth to encourage experimentation.

[smithdl]

On 9/30/2018 at 2:50 PM, nvzboy said:

That is just plain not true. At room temperatures the contribution of radiation emitted from an object is negligible compared to heat transfer through conduction and convection. As a rule of thumb radiation starts to contribute significantly at temperatures of 400°C and up

So, I am a professional firefighter for a living.  I am a hazmat technician, which by no means makes me a doctored chemist, but I have a very good foundation in chemistry.  I have my degree in fire science. (primarily focusing on how heat moves and transfers)  With that, lets do what you said, "not lose track of real life". 

con·duc·tion

kənˈdəkSH(ə)n/

noun

 

1. the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

   • the process by which sound waves travel through a medium.
   • the transmission of impulses along nerves.

So think heat running down a rod, or down a pipe.  NOT transferring the energy from the pipe to the atmosphere around it, but the metal pipe itself.

con·vec·tion

kənˈvekSH(ə)n/

noun

 

1. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

So this is the whole hot air moves up, and that moves heat energy up.  This game does not have this mechanic either.  This is how water boiled on a stove heats up.  You may have noticed the opposite happen when the top of a swimming pool is very warm in the sun, but 6 inches deep it is still cold

ra·di·a·tion

ˌrādēˈāSH(ə)n/

noun

 

1. 1.

   PHYSICS

   the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.

Although the definition of radiation doesn't go into much depth, you must understand that energy transfer this way does not require matter.

So back to your "real life" statement, it is the ONLY way heat can transfer in space.  As far as 400 degrees, that is only in relation to other temperatures.  If everything in the room is 400 degrees, it does not matter.  As a final point to show you are wrong, one of the main ways we move heat in our world is through a invention called a radiator.  Do you know why we call them radiators?  

As far as friction taking an ball of ice and creating enough heat to warm the entire thing up to north of 400 degrees, your crazy.  Yes there would be some heat generated on impact, but space is freezing cold.  Asteroids are freezing cold.  No offense, but your talking out your $#% dude.

 

And just to be perfectly clear to everyone, when you run a pipe into a room, and the room is colder than the pipe and its contents, the colder room will cool the pipe and its contents right?  This is an EXISTING game mechanic.  Almost ALL, I repeat, ALL of the heat transfer in this game is RADIATION!  The pipe and its contents will radiate heat into the room, and since the room doesn't have as much heat energy as the pipe, the pipe receives less than it gives to the room, lowering its temperature.  Radiation IS HOW THIS GAME MOVES HEAT ALREADY!!!!  They even have a pipe called a...   Radiating pipe!  All I am saying is that a vacuum doesn't stop this.  

Now I get that this game doesn't actually create an "object" called heat to transfer to one to the other, it just does a simple calculation based on two objects next to each other, so when you create a vacuum you don't have an object to do that with, so just make a vacuum have heat that is hidden from the user.

[Sasza22]

26 minutes ago, smithdl said:

So think heat running down a rod, or down a pipe.  NOT transferring the energy from the pipe to the atmosphere around it, but the metal pipe itself.

Well by the definition you are correct. But physically it`s more complicated. Atoms in the pipe interact with the air around it the same way they interact with each other. Conduction can happen between different materials. Radiant pipes (and radiators in general) are supposed to have a large surface area to increase conduction between the metal and the air around it.

As for radiation it contributes to that transfer as well. Every object above absolute zero emits energy as electromagentic waves (hot objects emit visible light). If there`s atmosphere around the object it will absorb a large amount of the heat radiated effectively making it undistigwishable form the heat conducted. This means we might as well ignore radiation in the simulation and addjust conduction accordingly.

In vacuum it`s different. With no atmosphere there is no conduction possible but radiation doesn`t get stopped close to the object. Radiating into space simplified for the game simulation would just be heat deletion when used in space but in an enclosed space the radiation from the object and the walls would equalize over time.

This is why i think objects exposed to space in game should lose heat due to radiation but not exposed shouldn`t.

[tk421storm]

I'm no scientist, but I completely agree with the OP. I was looking forward to space for a while; all the other heat removal methods feel gamey and not-at-all straightforward, and I was looking for space to be a more realistic way to vent heat. Now I get to space and I find out it's hotter than anything other than magma? That still blows my mind.

The game at its core is about heat, and managing it, but try watching a new player pick that up (without reading these forums start-finish) - the process with which heat is "deleted" is not at all intuitive (except for wheezes).

[Yunru]

2 hours ago, tk421storm said:

Now I get to space and I find out it's hotter than anything other than magma? That still blows my mind.

It makes sense... during the daytime.

[smithdl]

5 hours ago, Sasza22 said:

This means we might as well ignore radiation in the simulation and addjust conduction accordingly.

I 100 percent agree with you.  

All you would need to do is make a line from the top of the map down for each tile.  The first tile that is touched from that line would have a gain and loss of heat based on sun cycle.  Just a back end mechanic that said, "you now have a 300 degree tile of _______ on top of you".  The ________ wouldn't be there obviously, but the game would increase heat on that tile as if it was.  Then during the evening, you would have a -200 degree tile of ____________ on top of it. It would be very easy.  That way you keep all the mechanics the same, but you don't have space at 400 degrees.  Surfaces of things in space are losing heat unless there gaining it from a star.  Space is freezing.

[babba]

On 9/28/2018 at 4:48 PM, smithdl said:

I want to "generally discuss" it before I make a suggestion to the developers.  But thanks for looking out!

No worries on just posting your ideas in the suggestion forum section, just go for it. It has been often written about radioactivity, keep the beloved topic in the news

[nvzboy]

6 hours ago, smithdl said:

So, I am a professional firefighter for a living.  I am a hazmat technician, which by no means makes me a doctored chemist, but I have a very good foundation in chemistry.  I have my degree in fire science. (primarily focusing on how heat moves and transfers)  With that, lets do what you said, "not lose track of real life". 

con·duc·tion

kənˈdəkSH(ə)n/

noun

 

1. the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

   • the process by which sound waves travel through a medium.
   • the transmission of impulses along nerves.

So think heat running down a rod, or down a pipe.  NOT transferring the energy from the pipe to the atmosphere around it, but the metal pipe itself.

con·vec·tion

kənˈvekSH(ə)n/

noun

 

1. the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

So this is the whole hot air moves up, and that moves heat energy up.  This game does not have this mechanic either.  This is how water boiled on a stove heats up.  You may have noticed the opposite happen when the top of a swimming pool is very warm in the sun, but 6 inches deep it is still cold

ra·di·a·tion

ˌrādēˈāSH(ə)n/

noun

 

1. 1.

   PHYSICS

   the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.

Although the definition of radiation doesn't go into much depth, you must understand that energy transfer this way does not require matter.

So back to your "real life" statement, it is the ONLY way heat can transfer in space.  As far as 400 degrees, that is only in relation to other temperatures.  If everything in the room is 400 degrees, it does not matter.  As a final point to show you are wrong, one of the main ways we move heat in our world is through a invention called a radiator.  Do you know why we call them radiators?  

As far as friction taking an ball of ice and creating enough heat to warm the entire thing up to north of 400 degrees, your crazy.  Yes there would be some heat generated on impact, but space is freezing cold.  Asteroids are freezing cold.  No offense, but your talking out your $#% dude.

 

And just to be perfectly clear to everyone, when you run a pipe into a room, and the room is colder than the pipe and its contents, the colder room will cool the pipe and its contents right?  This is an EXISTING game mechanic.  Almost ALL, I repeat, ALL of the heat transfer in this game is RADIATION!  The pipe and its contents will radiate heat into the room, and since the room doesn't have as much heat energy as the pipe, the pipe receives less than it gives to the room, lowering its temperature.  Radiation IS HOW THIS GAME MOVES HEAT ALREADY!!!!  They even have a pipe called a...   Radiating pipe!  All I am saying is that a vacuum doesn't stop this.  

Now I get that this game doesn't actually create an "object" called heat to transfer to one to the other, it just does a simple calculation based on two objects next to each other, so when you create a vacuum you don't have an object to do that with, so just make a vacuum have heat that is hidden from the user.

I would like to start my rebuttal to this piece of disinformation with credentials of my own. I am a chemical engineer for a living, a profession in which heat transfer is explored in such detail to exploit it so that as much energy is harnessed for our purposes as possible. To say that I am talking out of my "expletive" is frankly insulting.

First, the game does include a rudimentary form of convection. When a hot and cold gas or liquid tile meet, not only can they exchange heat through conduction, they might swap places based on which one is hotter, the hottest tile swapping to the top. Effectively causing a sort of current. The visuals in the game do not represent this though, and the effect is minor as to be almost unnoticable, but it is there in the code.

Secondly while it is true that radiation is the only way to have heat energy transmitted in a vacuum, you are wrong in that radiation energy emitted takes into account ambient temperature, it only takes into account the temperature of the object itself. For more information I suggest you look into the stephan-boltzman law. My statement that is only comes into play at 400 degrees celcius harps back to the fact that all three mechanisms of transfer happen at the same time. If you compare how much heat is transfered between the mechanisms you will notice that in most applications (from -40 to 100°C) conduction and convection have the majority share. If you look up that law I mentioned you will notice temperature is to the fourth power, meaning that at some point radiation will catch up with those two other methods. That point, as a rule of thumb, is set to about 400°C so you don't waste your time calculating the contribution of radiation it in situations where it will likely not matter.

Third point of contention is the fact that a "radiator" is in fact not transferring most of its heat through radiation but through convection. Why else does it seem to be built to have maximum surface area and fins allowing flow through the body of the radiator? I understand the naming of this device and the pipes in the game is therefore a bit deceptive when you start nitpicking over what mechanism is actually occurring. But some inventor gave the name to this thing and it stuck. What are we going to do about it? Call it a convector instead?

The fourth point will require an extreme example and a simple one to prove to you impacts from objects causes the shedding of heat. My extreme example is the idea of an asteroid about 1km across hitting the earth. The actual rock hitting the earth and the crater it forms are actually not the biggest damage such an impact would do. The thing that would wipe us out is the fact that the energy of the impact would instantly heat the entire atmosphere to several hundreds of degrees, wiping out nearly all life instantaneously. Objects moving at such high speeds have incredible energy. Now to move to my small example. To prove to you that an asteroid has a tremendous amount of energy stored in its motion let me show you the formula for kinetic energy of a moving object:

E=m.V²/2

Let's say we have an asteroid of about 100kg, it moves at a typical speed for an asteroid of 20km/s. If we plug those data into the formula we get the amount of kinetic energy, which is about 40 000 MJ. That is M for mega joules or 10^6. If all of that heat were to go into the asteroid, how hot would it get? Let's assume the entire asteroid smudges on the surface like they do in ONI and all matter comes to a dead stop. The kinetic energy is translated to heat. How much would it heat up? Depends on the heat capacity. The typical meteorite has a heat capacity (cp) of about 500j/kgK. And E=m.cp.T. If we plug in those data and figure for T we find out that in that case the matter of the meteorite would have energy to heat itself up to an insane 400 000K. Plenty of energy. In real life however, you don't reach that temperature because that energy is given off to the environment as it enters an atmosphere and in space items don't come to dead stops. Rather parts of the meteorite will just bounce off in all manner of directions and take their energy with them. A bit like how balls on a pooltable bounce and ricochet when they hit eachother. 

 

To adress your final point and finish this essay: The game simulates only conduction (Most important) and convection (barely noticeable). Radiation IS NOT in the game. I will not write a long explanation on this, everyone on this forum will stand by that, the units in the game are even called "thermal CONDUCTIVITY" what makes you think the main mechanism is radiation then?

 

If you wish to debate the merrits of your idea, fine. But do not insult me or spread disinformation whilst doing it.

[babba]

What I hate most nowadays in internet forums is that someone replies with a plain short sentence after a really long big essay.

[mathmanican]

I love your short sentence @babba...... 

[smithdl]

So first, my original post had no disinformation.  The context of radiation being the primary way heat moves was in the context of space.  The whole context of this conversation has been SPACE! That is what we are talking about.  The law your referencing, how does it apply to the sun in space?  That is my point dude.  Your trying to hard to apply your knowledge and not listening.

Ambient temperature was not my concern, my concern was the heat radiating from the objects.  I know radiation does not care about ambient temperature, that is why it works is space.  But if something is receiving as much as it is releasing, its temperature stays the same.  That was the point I was trying to make.  

Radiators move heat by convection when air is moving over them.  Take the fan in your heat sink.  Turn the fan off and it doesn’t work near as well right?  Only radiation is working and as you have said in an environment with an atmosphere, it isn’t the best way.  You need the convection.  (Your point about surface area helps all heat transfer, so how there built works for both types)  In this game, when we move heat from pipes into the atmosphere around them, if the air isn’t flowing over the pipe, that isn’t convection.  It’s no different then when I can feel the heat of my motor without touching it.  That’s the radiation.  So yes, radiators that are designed to have airflow over them work with convection.  (And your correct, more heat moves through convection) But without it, such as a boiler simply putting hot water into pipes that are exposed to the room, it’s radiation. (Hence why there called radiators.)  That is also why I believe it is mostly radiation in this game, as nothing requires air flow to transfer heat.

As far as asteroids go, with no atmosphere you would have only the matter of the asteroid to calculate the heat absorbed.  To do that is not as simple as you propose in my opinion.  But you are right, it would increase heat.  But I said it would increase heat.  But there are many factors with no atmosphere.  It obviously wouldn't just come to a stop.  And how much of that heat would leave as radiation into space with no atmosphere?  But your probably closer to right on this one then I am.  It was a knee jerk comment and I’m no physics guy, so I’m talking out my #%* here.

[babba]

2 hours ago, mathmanican said:

I love your short sentence @babba...... 

Hihihi.

Nice steam engine setup ! I just checked out some stuff on intel cpu`s with 15 to 20 Megabyte Level 3 cache. That will run ONI a bit better. ONI will run awesome in 20 years with 1000 dupes.

[smithdl]

nvzboy,

   I shouldn't have made the comment, "your talking out your *$%".  When I saw your response that heat doesn't move primarily through radiation, my mind was on the context of space, and so I figured you for some high school kid who read a chapter on heat and thought he knew it all.  I think at the end of the day, you know this stuff at a deeper level then I ever care to, and I have no interest in getting in a "who is smart" debate with you.  I am confident I will lose.

So, I am sorry for saying that.  It was offensive.  To be honest, your comment about "real life" offended me, so I did what I thought was jabbing back.

The point that I am ultimately getting to is that space is cold.  It sucks the heat out of things, and it does it by radiation.  I get that you can't have a game duplicate real life.  I get that real heat transfer is significantly more complicated than what this game can produce, and who wants that anyway?  I don't want to have to be an engineer to play the game.  That is why it is a game.

What I want is an intuitive and "makes sense with common knowledge of how life works" ways to remove heat.  On an asteroid that has no atmosphere, short of freezing gases coming from geysers or more tools like wheezes and AETN's, space is the ticket through radiation.  The idea that we are on an atmosphere free asteroid but struggle with heat build up is crazy and just doesn't fit.  The fixed output stuff where we are boiling PW and then filtering it to cool it just doesn't work for me and I can't imagine a new player having that make sense.  Heat has been my pet peeve about this game form day one.  I can plug in a fridge at my house and make ice cubes and chill my water for my whole family, keep all my food cold and frozen on a normal plug in, yet to make water cold enough to water plants in this game I have to run a power hungry hydrotuner and it only drops the temp by 24 degrees?  Sorry, that is dumb.  Anyway, sorry for the comment, just trying to make the game better.

[Sasza22]

13 hours ago, smithdl said:

It’s no different then when I can feel the heat of my motor without touching it.  That’s the radiation.

Let me just say that you are wrong here. What you are feeling is the motor heating up the air around itself by the basic conduction mechanism and the air spreading the heat further using convection. You don`t feel the radiation. The temperature is way to low for that. If there was vacuum between you and the motor you wouldn`t feel a thing.

In real life scenarios we can`t really feel heat from radiation other than from the sun or really strong lamps. Well ok microwave ovens use radiation. That`s one thing. My point is that most heat sources use all three types of heat exchange at the same time and the radiation while being there is not contributing the most to it but rather the opposite. Then even when heat gets radiated the radiation gets absorbed by the surrounding gas making it work on a small distance effectively being non different than regular conduction.

Now in space conduction and convection is impossible due to lack of atmospehre around. This leaves just radiation. What it causes is objects heating up to really high temperatures when exposed to sunlight and really low when not. This is not simulated in the game.

Ok now lets settle on the fact that the gmae uses conduction as a heat exchange mechanic. Lets not talk about semantics. It uses a "simple" system that exchanges temperature with nearby mediums. With no medium present there`s no way to exchange heat. This is why we need another one for space.

[smithdl]

I disagree, in a vacuum you would still feel the radiating heat from a hot motor, the temperature is not to low.  We feel radiation all the time, I couldn't disagree more.  One of the most common places we feel it is camping and sitting around a camp fire.  The heat from convection all goes up, and what we feel is radiation.

Regardless to all of this, convection takes air movement, radiation is the only way heat moves in space, and an asteroid that hits something without an atmosphere doesn't melt the surface of it.  The moon gets hit by 2800 Kg of material a day, and its still -127 degrees in a night cycle.  (Yes I know the moon is huge and its not that simple, but no atmosphere greatly impacts the amount of heat created)

I'm not spreading disinformation, I am making valid points.  Space is freezing cold.  Its because the heat radiates away.  And if you really want to get down to the nuts and bolts of it, in the context of our atmosphere and heat moving to the earth, and the that heat dissipating from the earth at night, radiation is the PRIMARY way heat moves on earth.  Yes, inside of buildings and working on HVAC systems, I agree it isn't.  But the context of this conversation has been space from the beginning.  

 

 

[Sasza22]

34 minutes ago, smithdl said:

Space is freezing cold.  Its because the heat radiates away.

Yes you are right here. It`s cold in space. Lets not argue about the mechanic that heat spreads on Earth since it`s pointless. As for space it`s radiation. A system not implemented in ONI. We need some sort of radiation to keep the surface cold.

 

37 minutes ago, smithdl said:

an asteroid that hits something without an atmosphere doesn't melt the surface of it.

It`s all dependent on the mass and velocity. An object hiting something generates heat. But i think the implementation is backwards. They should implement heat loss from radiation first then add heat from asteroid hits IMO.