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Do Satellites Actually Exist? (self.conspiracy)

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[–]wheelinganddealing -7ポイント-6ポイント  (50子コメント)

I don't think they do. Why don't we have a live feed of Earth with all those satellites up there? There aren't really any pictures of Satellites in orbit, how do the computers in them survive the heat and radiation? So many questions.

[–]ThePsion5 3ポイント4ポイント  (0子コメント)

So many questions.

Why don't you try and do some research to answer them?

Why don't we have a live feed of Earth with all those satellites up there?

First page of Google search results for "live satellite feed"

There aren't really any pictures of Satellites in orbit

First page of Google search results for "amateur astronomy satellite image"

how do the computers in them survive the heat and radiation

I'm not technically-versed in satellite construction, but I assume the same way one hardens computers to survive heat and radiation on Earth. Again, why not do some research to find out how satellites are designed?

EDIT: First page of Google search results for "how do satellite cooling systems work"

[–]Dude_wtf_seriously 3ポイント4ポイント  (45子コメント)

Wow.... seriously your reasons hold no water at all. Its logic like yours that lead idiots down the wrong path.

You cant see satellites in pics because they are miniscule in the view of the earth.

So sad and scary that people like you sway others unknowingly down the wrong path

[–]Balthanos 0ポイント1ポイント  (0子コメント)

Relevant /u/?

[–]scaredshtlessintx 0ポイント1ポイント  (3子コメント)

Dumb question here....but can you see sats w naked eye? I've always thought they're too small w no light ...but at night I see what looks like stars slowly moving across sky in varius directions, which I assume are sats...input?

[–]DirectorSmith 0ポイント1ポイント  (2子コメント)

At best you would see them as flashes of light as they move across the sky. The only one that you might see continually is the ISS, which is big enough to see continually as it moves across the sky.

For ISS visibility, NASA has a website you can check to see if the ISS is currently overehead .

[–]PM_ME_YOUR_TRINKETS [スコア非表示]  (0子コメント)

You can see some satellites continuously, they do just look like moving stars.

[–]Redchevron -1ポイント0ポイント  (39子コメント)

Actually it's a perfectly logical question that most people never ask themselves.

If the thermosphere is as hot as they claim it is, and there is no significant atmoshphere in which to radiate(Which is how cooling works) the heat away from the satellite, the absorbed solar radiation would decimate delicate electronics systems (which are producing their own heat mind you).

The "science" of satellites breaks down almost immediately with just the slightest bit of inquiry and a basic understanding of thermodynamics.

[–]PM_ME_YOUR_TRINKETS 3ポイント4ポイント  (38子コメント)

"Basic understanding of thermodynamics", don't make me fucking laugh.

If you had a basic understanding of thermodynamics, you'd understand that the thermosphere being described as "hot" means that the gas particles in it have a lot of energy, because that's how temperature works (in general). You'd also understand that the particle density is incredibly low, so the total energy transferred from gas particles to your satellite or whatever is very low.

Secondly, you're confusing radiative cooling with conductive cooling. Considering there's only three basic ways of transferring heat, I'd expect someone with a "basic understanding of thermodynamics" to know the difference between them. You don't need an atmosphere or any sort of medium to radiate away energy. Spacecraft don't use conductive or convective cooling for the exact reason that you need a medium to do it and so it obviously doesn't work in space.

The science of satellites breaks down with just the slightest bit of misinformed inquiry and a incredibly basic, if not outright wrong, Dunning-Kruger understanding of thermodynamics.

[–]Redchevron -4ポイント-3ポイント  (37子コメント)

so the total energy transferred from gas particles to your satellite or whatever is very low.

Heat isn't "transfered" from the gas particles to the satellite. That's the stupidest explanation I've ever heard.

Do you think that a sidewalk heats up to 140 on a hot day because the gas particles in the atmoshphere are transfering their heat energy?

No, it's directly absorbing solar energy and because it's a better conductor than the surrounding atmosphere, and thus it get's significantly hotter.

You don't need an atmosphere or any sort of medium to radiate away energy.

Really? Because where do you think that energy goes when it "radiates" away?

This dude just read a few wikipedia articles and decided he'd have a go.

What a joke.

Ps. you know how I know you're from topminds? ....da-da-da-dunning-kruger.

It's your ace in the hole.

[–]PM_ME_YOUR_TRINKETS 1ポイント2ポイント  (6子コメント)

Some energy is transferred from the gas particles to the satellite and vice versa, it's just a small amount in total because there aren't a lot of particles.

The sidewalk heats up due to radiative heating from the Sun, although there is some conductive heat transfer to and from the atmosphere as well. How do you think energy from the Sun gets here through the vacuum of space?

The energy radiates away into space as EM radiation.

You actually have no clue about thermodynamics or how heat transfer works.

[–]Redchevron -1ポイント0ポイント  (5子コメント)

Lol, this is great.

So tell me Einstein!

Why do the sidewalk, the hood of my car, and the interior of my car, all reach vastly different temperatures if they are all being heated by "radiative" heating?

If I'm using a uniform heat source like sunlight warming the atmosphere, everything should arrive at the same temperature.

[–]PM_ME_YOUR_TRINKETS 1ポイント2ポイント  (0子コメント)

Different objects will heat up at different rates. They will absorb and emit more energy depending on their shape, size, surface, material, etc. and their temperature will depend on their heat capacity, i.e. water will take longer to get from temperature X to Y than say, asphalt, because the water actually requires more energy to get to the same temperature. The sidewalk is dark asphalt whereas the hood of your car is probably reflective metal, so it will heat up at a slower rate. The interior of your car also experiences a greenhouse effect which traps heat.

If you left them in the Sun, everything would indeed eventually reach the same temperature. Please note that putting your hand on the car/pavement is in absolutely no way an accurate way of telling the actual temperature of an object.

Seriously, do you just think energy transfer through radiation don't real or something?

[–]ThePsion5 [スコア非表示]  (0子コメント)

Why do the sidewalk, the hood of my car, and the interior of my car, all reach vastly different temperatures if they are all being heated by "radiative" heating?

If I'm using a uniform heat source like sunlight warming the atmosphere, everything should arrive at the same temperature.

Haven't you ever wondered why the water in a stovetop pot heats up more slowly than the pot itself? Different materials heat up at different rates based on their physical composition. This is grade-school science.

[–]ICorrectYourTitle 0ポイント1ポイント  (2子コメント)

Are you serious? How old do you think the earth is?

[–]Redchevron 0ポイント1ポイント  (1子コメント)

What does that have to do with anything?

[–]ICorrectYourTitle 0ポイント1ポイント  (0子コメント)

Your ability to understand scientific evidence and come to logical conclusions. It's 2000 years isn't it? You think the earth is 2000 years old.

[–]DirectorSmith [スコア非表示]  (1子コメント)

Really? Because where do you think that energy goes when it "radiates" away?

Look up "Black Body Radiation" when you get a chance. It's how satellites get rid of heat in space.

[–]PM_ME_YOUR_TRINKETS [スコア非表示]  (0子コメント)

You mean black magic, since black body radiation clearly doesn't real, as /u/Redchevron has shown us.

[–]KamikazeWizard 0ポイント1ポイント  (13子コメント)

Radiation is the transfer of energy by light so it doesn't need a medium

[–]Redchevron -2ポイント-1ポイント  (12子コメント)

Well thats a simplified version.

Light doesn't require a medium, heat does.

[–]KamikazeWizard 1ポイント2ポイント  (3子コメント)

The medium of heat transfer is light in this case

[–]Redchevron -1ポイント0ポイント  (2子コメント)

I agree. He is transferred into the satellite via light wave radiation it cannot be transferred out.

[–]KamikazeWizard 2ポイント3ポイント  (0子コメント)

Yes it can, it is being transferred out exactly the same way it was transferred in, by radiation

[–]DirectorSmith [スコア非表示]  (0子コメント)

He is transferred into the satellite via light wave radiation it cannot be transferred out.

Again, look up black body radiation. Objects get rid of heat via EM radiation in the infra-red spectrum.

[–]loptthetreacherous 0ポイント1ポイント  (3子コメント)

What medium is used to transfer the heat from the sun to the earth?

[–]Redchevron -2ポイント-1ポイント  (2子コメント)

You are trying to derail this conversation. The satellite can emit all of the infrared radiation it likes into a vacuum. Without heat transfer it will combust.

[–]loptthetreacherous 3ポイント4ポイント  (0子コメント)

Emitting infrared radiation is a form of heat transfer. You're taking energy out of a system in the form of heat.

Seriously, it's right there on Wikipedia: https://en.wikipedia.org/wiki/Heat_transfer

The three fundamental modes of heat transfer are conduction, convection and radiation.

[–]PM_ME_YOUR_TRINKETS 2ポイント3ポイント  (0子コメント)

Emitting radiation into space literally is heat transfer. The heat is taken away by EM radiation and is no longer in the satellite, i.e. the satellite is now cooler after emitting radiation.

[–]PM_ME_YOUR_TRINKETS 1ポイント2ポイント  (3子コメント)

Heat transfer through conduction and convection does. Objects also lose energy through radiation, in which energy is emitted as EM radiation.

[–]Redchevron [スコア非表示]  (2子コメント)

Went and got a posse I see...

Consensus reality.

[–]loptthetreacherous [スコア非表示]  (0子コメント)

Ah yes, the only reason multiple people will disagree with you is because someone else went and got their friends to back them up, it's definitely not because you're unable to understand physics taught to 14 year olds.

[–]PM_ME_YOUR_TRINKETS [スコア非表示]  (0子コメント)

Nope, I've no idea who any of these other people who have replied to you are.

You're just completely wrong and multiple people have decided to tell you so.

[–]loptthetreacherous 1ポイント2ポイント  (13子コメント)

Because where do you think that energy goes when it "radiates" away?

It radiates away from the satellite in all directions.

[–]Redchevron -2ポイント-1ポイント  (12子コメント)

Into what?

Radiation as a means of heat transfer requires air molecules...

[–]loptthetreacherous 2ポイント3ポイント  (11子コメント)

No it doesn't heat radiation is transferred via electromagnetic waves.

If it needs air molecules then how the fuck did it get from the sun to the satellite in the first place?

[–]Redchevron 0ポイント1ポイント  (10子コメント)

You do understand I'm talking about thermal radiation and not light wave radiation?

[–]loptthetreacherous 1ポイント2ポイント  (8子コメント)

Thermal radiation is infrared radiation which is transferred via electromagnetic waves.

[–]WadeWilsonforPope 0ポイント1ポイント  (0子コメント)

Why don't we have a live feed of Earth with all those satellites up there?

Live Stream from ISS

Most satellites dont have a go pro on them. You can view the data they are generating in real time though.

http://www.opensats.net/

Another interesting site.

There aren't really any pictures of Satellites in orbit

We do have a few images of shuttles releasing Satellites but once again no one pays a few million to put a camera into space, they are usually loaded with sensors or comms equipment.

how do the computers in them survive the heat and radiation?

http://www.dansdata.com/spacecomp.htm

Read up on this link.

Most mission critical hardware is running a variation of this https://en.wikipedia.org/wiki/Magnetic-core_memory

Its radiation and EMP proof. While you wont be playing Farcry on a machine running with this memory you wont really have to. The satellites and electronics in space arent doing a bulk of the computing. They are very simple and typically handle a few very important duties. Why calculate things in space when you can transmit the relevant data and have the solution beamed back?

Heres another example of a hardened CPU used in many space applications

https://en.wikipedia.org/wiki/IBM_RAD6000

Including spirit and opportunity rovers.

So while you are correct that these things are more difficult than most people assume its not anywhere near impossible. Humans are smart as fuck give us a bit of credit.

[–]gwsb 0ポイント1ポイント  (1子コメント)

We do have live feeds of the Earth (Weather maps, GPS, Intelligence gathering) but the satellites are in low orbit, just like the ISS. They can't capture the whole Earth, if that's what you meant, because they are not high enough.

[–]DirectorSmith 1ポイント2ポイント  (0子コメント)

If you want a picture of the full globe, we do have satellites in geo-stationary orbit. However, satellites in geo-stationary orbit stay orbiting the same place over the earth all the time (hence the "stationary") part of the name.

One such satellite that has frequently updated images available is Himiwari-8. You can see the latest images from this satellite at the link below:

http://rammb.cira.colostate.edu/ramsdis/online/himawari-8.asp