Recent Posts

Pages: 1 [2] 3 4 ... 10
11
The Hoax Theory / Re: Watching the detectives...
« Last post by TimberWolfAu on November 12, 2025, 10:49:11 AM »
The force of a vacuum..........

I'll admit, I too used to brandy about the idea of a vacuum having a force, it didn't click for a while that the force is coming from the 'other' direction, because a vacuum cleaner sucks, so a vacuum *must* have a force, right? But then again, it wasn't something i'd actually given any real thought to, but I didn't resist when 'new' information was provided that showed the error in my thought process.

And yeah, the whole Torr values thing is amusing. "-6 is way stronger than -4!!!", yeah, nah. That negative in the exponent means your difference is getting smaller and smaller at each step. Why didn't Jarrah pull them up on this? Isn't he supposed to be the resident astrophysicist/geologist?

Side note, new debate between MCToon and 'Rasa' coming up in about a week apparently.
12
The Hoax Theory / Re: Watching the detectives...
« Last post by onebigmonkey on November 12, 2025, 02:55:36 AM »
The defectives continue to try and run the zoo, and the animals continue to go hungry.

This wek they turn their attention to vacuum testing of suits, which they claim wasn't done to the standard they feel is appropriate.

They seem very upset that testing wasn't done at Sandusky but at JSC, which, they claim, was only capable of 10-4 torr, and not whatever arbitrary value of Torr they feel is appropriate. In the comments secrtion they say this:

"No space suit has ever been tested to torr 10 -6 in that chamber. NASA used the chamber at the Glenn Research Centre but that could only go to torr 10-4. That is just not enough for a real test."

This is despite this document:

https://ntrs.nasa.gov/api/citations/19740012430/downloads/19740012430.pdf

very clearly stating that the vacuum chamber used could get to 10-6, it did do so, and did so during testing of suits.

They have yet to present any evidence whatsoever that this value is not an adequate test of suit integrity, they have just declared that it is. This is despite every space suit ever made, and used, wherever it has been used, being tested in exactly the same way.  Their claim is that someone using a suit outside the ISS is somehow not under the same strain as someone on the moon, but never once present any evidence that this is the case.

The rest of the video is a while bunch of the usual appeal to Jarrah's authority (he can do maths in his head - IN HIS HEAD!!), a continued failure to understand that anything standing in the way of a chunk of radiation is a shield and it doesn't have to have the word "radiation shield" stamped on it for it to work as such, a bucketful of personal incredulity about how terrible it would be if a suit failed in a vacuum, and a large amount of baiting of SciMan Dan and Dave McKeegan.

Oh, and they also demand that Dan and Dave answer why it's called Torr, before going on to explain that it measures "the force of a vacuum against atmosphere".

No.

1 Torr is the amount of force required to push 1mm of Mercury up a tube, or 1/760 of a standard atmosphere. 10-4 would push that column of mercury up 0.0001mm. If they think there's a massive difference to suit integrity between that and an atmosphere's ability to push any less than that, they need to show their workings. If you're going to bait someone about their supposed lack of knowledge and the superiority of your own, it's probably best to get it right yourself.

Have some more documentation and video about testing fellas. Learn something.

https://nescacademy.nasa.gov/video/aafb3191540f407295812384f65465721d



https://www.nasa.gov/history/50-years-ago-apollo-suit-backpack-passes-vacuum-testing/
13
Tech Support / Re: Site offline for a day or so?
« Last post by Peter B on November 10, 2025, 03:15:59 PM »
Cool, no worries!
14
Tech Support / Re: Site offline for a day or so?
« Last post by LunarOrbit 🇨🇦 on November 09, 2025, 09:38:55 PM »
Yeah, sorry about that. The site was using more server resources than normal which caused it to go offline. I didn’t notice right away because it was showing a cached version for me.

I’m not sure what caused the higher server usage. It might have been an over zealous search engine or AI bot indexing the site. I added the verification test that asks you to confirm that you are not a bot to slow down bots and hopefully reduce the burden on the server. It should only be needed temporarily.
15
Tech Support / Site offline for a day or so?
« Last post by Peter B on November 09, 2025, 04:03:38 PM »
And when I came in just now it wanted to verify me?
16
The Hoax Theory / Re: Watching the detectives...
« Last post by JayUtah on November 06, 2025, 09:50:13 AM »
A well-meaning documentary producer once asked me how intense the radiation is in the Van Allen belts. That's like asking, "What's the temperature on Earth right now?" He wanted a single number, an easy-to-digest figure for a lay audience. Even the answer, "Well, it varies, but on average is <number>," wasn't really what he was looking for. The desire to make the world fit a particular level of understanding of it is very strong.
17
The Hoax Theory / Re: Watching the detectives...
« Last post by Jason Thompson on November 06, 2025, 04:09:53 AM »
We love to put lines somewhere, so we can say "this is X, and this is Y" but defining when X becomes Y can be fuzzy, and often down to personal interpretation.[/i]

And to make matters more confusing, it can vary depending on the context. Where is the boundary of the atmosphere? There's the Kármán line, but that's pretty arbitrary and more for legal definition than a physical one. We've divided the atmosphere into layers but defined by altitude rather than by physical characteristics, which not only are a gradient rather than strict demarcations but change anyway in a dynamic system like the atmosphere. For most purposes the ISS can be considered outside the atmosphere, and yet atmospheric drag still has an effect requiring regular altitude boosting shunts from visiting spacecraft.

Of course, this degree of 'fuzziness' in reality makes conspiracy threorists' heads explode, since they can't cope with anything other than absolutes.
18
The Hoax Theory / Re: Watching the detectives...
« Last post by TimberWolfAu on November 04, 2025, 06:49:00 PM »
But the effect is subtle and diffuse, only visible from distance. There is no contradiction in not being able to see something close up that is obvious from far away. Even if any colour change visible in the image there could be diorectly attributable to the engine exhaust, it's a much smaller engine, so of course it is going to impact a much smaller area.

Like geoglyphs, you can walk over them without noticing, but get far enough away and you can see the entire picture.

Terry Pratchett had a good observation (from The Science of Discworld), probably made by others too but I remember Terry's, in that humans are really good at handling beginnings and endings, but becomings confuse us. We love to put lines somewhere, so we can say "this is X, and this is Y" but defining when X becomes Y can be fuzzy, and often down to personal interpretation. For a lunar lander, we can say "this area here (50m away) is undisturbed, and this area here (under the lander) is disturbed, but between those two points the transition is so subtle that putting an accurate line between disturbed and undisturbed is hard to define. Another examples is, at the beginning of this reply I thought I had a good point, and at the end I think I lost it somewhere, buggered if I know where though.  ;D
19
The Hoax Theory / Re: Watching the detectives...
« Last post by onebigmonkey on November 04, 2025, 06:10:05 AM »
For their latest video they ADs have turned their myopic eye to Chang'e-6, and what they believe shows proof that Apollo's landings shown in the 16mmm footage are false, main ly because you don't see a blast crater.

Here's the footage.



They claim that Apollo's engines continue to put out gas after shutdown and landing. This is also exactly what you see in the Chinese footage. The probe cut out it's rockets just before landing and then settled, and the footage clearly shows the action of rocket exhaust after it lands. I'm no rocket scientist, but Jarrah's claims that the exhaust should "instantly stop" surely ignores the fuel still in the system some pipe length from the engine bell.

They also claim that they can see the probe's exhaust "dig a crater in the ground". You see no such thing.

Here's the frame they're discussing:



The crater they claim is being excavated is at the bottom and centre. It is nothing of the sort. It's a dust devil whipped up by the engine bell. They have no image of a crater anywhere. I've been trying to get hold of the images from China's site but it's going through one of its uncooperative phases right now, but until we see one that shows one their claim rests entirely on "I'm sure there must be one".

This study

https://pubmed.ncbi.nlm.nih.gov/40328779/

even shows that a shallow crater exists right under the engine bell before it lands (probably the one whose existence allows the creation of the 'dust devil'), as well as identifying where the landing camera sits on the probe, so even if they were able to identify a crater beneath the bell, they couldn't possibly claim it didn't exist already.

In fact, when you look at the full sequence of images, you can see that after landing there's quite the collection of small pebbles and other material very close to the engine bell and the RCS thrusters it used. How come that material is still there?



They also go on about the lack of dust in the footpads of Apollo. Why would dust being dispersed at high speed suddenly decide to settle in a footpad? If you look at the photos taken by China, they have no dust in their footpad other than that which has settled in it after the pad has dug itself into the ground.



If they thought about it for more than a second, they might realise that the flow of exhaust material is diverted away from the footpad by the lander legs, making it even less likely that entrained material is just going to conveniently drop into a footpad. Material is entrained, by gas, it continues away from its origin at speed until lunar gravity overcomes the force that lifted it, after which it is deposited. Simple physics boys.

It's also very obvious that despite the engine exhaust there's plenty of surface material around, as evidenced by the rover tracks as it leaves its housing:



Jarrah also turns his attention to the surface discolouration report for Apollo missions (particularly Apollo 15s), asking why it isn't visible in the Apollo surface imagery. YOu might equally ask why it isn't visible in any surface imagery of any unmanned probes, including Chang'e-6. You can see a change in the surface colour, but that is more likely to be from the depression in which the probe sits.



The LRO certainly identifies some discolouration, just as it does with Apollo landings:



But the effect is subtle and diffuse, only visible from distance. There is no contradiction in not being able to see something close up that is obvious from far away. Even if any colour change visible in the image there could be diorectly attributable to the engine exhaust, it's a much smaller engine, so of course it is going to impact a much smaller area.

By far the most ridiculous claim comes from Robert Williams, who claims to be able to see the shadow of someone holding some sort of blower creating jets. Apart from this being beyond ludicrous, a jet on Earth would not create the kind of effect you see on the Apollo landing videos, nor would it somehow magically create surface features that were unknown prior to the landings, but confirmed since.

In sort, the video from Chang'e-6 shows surface impingement of engine exhaust, dispersal plums of material disappearing at high speed, some residual dispersal from outgassing after engine shutdown, and lots of surface debris still left behind, because (as someone once pointed out in relation to Apollo footage), if dust is being picked up, there is obviously still dust there. Surface discolouration can be seen in orbital images, just as it can for Apollo, and no material can be seen in footpads other than that deposited from soil falling in after landing. There is no difference between in the broad substance China's of footage, or indeed anyone else's, and that from Apollo. All they have here is personal incredulity and either an unwillingness, or an incapability, of tracking down more than the single source they know of as their evidence. And stupidity. Much stupidity.
20
The Hoax Theory / Re: The Sound of Silence
« Last post by Allan F on November 04, 2025, 05:49:17 AM »
Pages: 1 [2] 3 4 ... 10