Planned debris recovery satellite

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That's a plan by extra-terrestrials ... to safeguard Space from Mankind, they want to cage us in.

MichaelG.

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Edit: I note that the specified diameter has changed since I quoted Martin's post.

Edited By Michael Gilligan on 01/12/2017 09:38:05

Why premanent?

Debris on low orbit gradually decay due to traces of atmosphere present there. within few decades they would fall into air and burn.

Debris on geostationary orbit would not suffer this fate due to a lack of appreciable quantities of gases causing orbit decay.

If they are of small size (say 1 mm) and released in quantities of many millions, no conceivable technology exist to clear them out (or even to track them) and natural orbit decay could take many millenias.

So such debris are permanent for all practical purposes.

Martin

Edit:

I remember statements that blobs of plasma sufficient to damage satelites are formed when weight of debris is in range of 10-100mg. This would comfortably fit into tungsten ball diameter of 1-2 mm, hence edit of my initial post.

Edited By Martin Dowing on 01/12/2017 10:29:31

Thanks Martin. "(So such debris are permanent for all practical purposes.)"

Just wanted to know what you ment by permanent.

regards Martin

If anyone is interested enough to seek them out, the National Space Centre in Leicester has pieces of micrometeorite damaged spacecraft parts on display in the tower section. It's frightening how much damage a grain of sand sized particle can do at the impact velocities we're talking about.

In the 1950/60s there was a suggestion to place into orbit millions of fine copper needles that would spread out and form a reflecting layer for radio signals. Good job that didn't happen. Now here we are again.

Edit. Oh, they did! Project West Ford. The needles did mostly disperse and fall back to Earth & burn up.

Geoff

Edited By Geoff Theasby on 01/12/2017 11:39:25

Its simple.... just mention you left some redundant copper pipe and old bedstead in the front garden / somewhere near the moon and I can guarantee it will be gone before you blink, well it works here in south London!

Moon Landing.

One of my Lecturers in the 70's was an Amateur Radio buff. He was very keen on sattelite dishes - cutting edge technology at the time. He said that in 1969 he had his dish aimed at the Moon, and was watching the "free to air" TV signal coming from the Moon!

Llikewise, I have a friend who is a Doctor of Geology, and therefore not a fool, who is an amateur astronomer, and his comment on the subject is that they - the amateur astronomers (in Australia), where watching the activities on the Moon. He said that " ... they could see the "Moon Lander" and the astronaughts moving around on the Moon - with their telescopes"!

I know it happened!

Think someone is pulling your leg, no way could an amateur telescope see such fine detail!

With regard to clearing all the space junk, I reckon that it is an almost impossible task, you would need thousands of satellites that were highly agile to even make a dent in the number of objects orbiting the earth.

Andrew.

Despite the best efforts of an intelligent disbeliever at work to prove me wrong, I'm happy that the moon landings were genuine.

Such doubts aren't to be discounted lightly because of the number of other facts that are wrong. For instance:

• James Watt did not invent the steam engine
• George Stephenson did not invent the steam locomotive or standard gauge railways
• Alexander Graham Bell did not invent the telephone
• Samuel Morse did not invent Morse Code or the Electric Telegraph
• Marconi did not invent Radio
• Robert Watson-Watt did not invent Radar
• Frank Whittle did not invent the Jet Engine
• John Logie-Baird did not invent television
• Thomas Edison did not invent the filament light bulb
• The Wright Brothers did not invent the aeroplane
• Einstein did not invent the atom bomb

And of course many people had discovered America before Christopher Columbus. It's just that before Columbus it had always been possible to cover it up...

Dave

I've said this before but just because lots of people lack the intellectual capacity to understand the science that made the Moon landings possible doesn't mean it didn't happen. I find the arrogance of those that say it must be a conspiracy simply because they personally can't get their head around it hard to deal with. It's all part of the "my ignorance is as good as your knowledge".

No it isn't.

I'm afraid Alan that you were indeed having your leg pulled if they claim to have seen the TV signals and heard the radio of the astronauts with an amateur dish. There were only seven or eight dishes in the wold considered good enough to receive and refine the signals to a sufficiently good standard and these were all around 200ft in diameter or more.

I do recall, aged 8, being dragged out of bed early on the grounds of "this is history in the making, you will remember this" to watch the first man walk on the moon. According to a popular source that was 02:51 UTC. I think we were on double summer time, so around 5am local.

"Frank Whittle did not invent the Jet Engine" Go on then, who did?

Re Moon landing deniers.

Russians were closely watching American activities and if there is some credible evidence that Moon claims were false, this would surely be flagged in communistic block but it was not. Hence it is unlikely that Americans cheated.

Some small cheat, where the Eagle could simply make an orbit or few around a Moon and come back on Earth without landing there is still technically possible, particularly in regard to first visits reported.

IMO all these landing deniers are coming from quite unconfortable situation that humans are already post peak in respect to manned space conquest, eg we are not going there anymore, not to the Moon and not anywhere else, due to lack of courage and most imprtantly lack of resources to make it happen again. Basicly reasoning is that if now, after so much progress we are not going there, then initiat claims are surely a lie. Technologically inferior society cannot achieve something what more advanced one cannot. This reasoning is false but nevertheless convincing for many.

So regardless, what the truth is, as long as the venture is not repeated again, school books (or their electronic version) 200 or 300 years from now on will treat Moon landing claims as great myth of XX century, of course provided that peoples 200 or 300 years into the future will still be able to read and write. Our education system is doing all it can to make sure that it will not be the case.

Martin

"Frank Whittle did not invent the Jet Engine" Go on then, who did?

Most likely few junior engineers working together with him.

Martin

I was under the impression that the first jet engine to be developed and flown was in Germany and predated Whittle by 2 or 3 years.

But I suppose this doesn't go down too well with the "We won the war brigade".

Andrew.

Frank Whittle's design dates from 1928, but didn't fly until 1940. Von Ohain's design came later, but flew in 1936.

Geoff

We wont go back to the moon until there either a money reason or national pride makes someone find the money.