Astrophysics and astronomy and space things

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This Is Helena
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Re: Astrophysics and astronomy and space things

Post by This Is Helena » Wed Jul 29, 2015 12:22

Yes, you've put it better than I could have. I think, also, I like that it's something so new and as such (possibly) signals a massive technological leap forward.
Last edited by This Is Helena on Thu Aug 06, 2015 10:47, edited 1 time in total.
be popular play pop

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tonieee
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Re: Astrophysics and astronomy and space things

Post by tonieee » Wed Jul 29, 2015 12:35

Sorry to be a downer but:
"Our test campaign cannot confirm or refute the claims of the EM Drive but intends to independently assess possible side-effects in the measurements methods used so far," said Prof Tajmar in anew

"Nevertheless, we do observe thrust close to the actual predictions after eliminating many possible error sources that should warrant further investigation into the phenomena."
So they haven't proved conclusively that it works yet, just that they haven't been able to prove that it doesn't.

Also, found this:

http://io9.com/no-german-scientists-hav ... 1720573809

They've reproduced the tests done by NASA and Chinese scientist and got similar results but apparently there are still things in the experiments that could cause a false positive result.

I still really, *really* hope it's true though :-).

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tonieee
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Re: Astrophysics and astronomy and space things

Post by tonieee » Wed Jul 29, 2015 12:38

This Is Helena wrote:I like that it's something so new and as such (possibly) signals a massive technological leap forward.
I read somewhere that if it is true then it won't just be revolutionary for space travel but all travel on earth too - it could replace the engines we currently use for surface and air transport with something much better.

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Re: Astrophysics and astronomy and space things

Post by humblebee » Wed Jul 29, 2015 12:59

tonieee wrote:So they haven't proved conclusively that it works yet, just that they haven't been able to prove that it doesn't.
Fuck it, that's good enough for me. Pass the protein pills, I'm off to the Bay of Tranquility.

noLooking

Re: Astrophysics and astronomy and space things

Post by noLooking » Fri Jul 31, 2015 20:11

This Is Helena wrote:This is my favourite bit of that article: 'scientists still have no idea how it actually works'. It's very pleasing for some reason.
It reminds me of what Arthur C. Clarke said, that "Any sufficiently advanced technology is indistinguishable from magic".

It's good to believe in magic, I think.*

(Unless perhaps you're a woman in the seventeenth century being persecuted by the authorities for sucking on the devil's teat)


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tonieee
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Re: Astrophysics and astronomy and space things

Post by tonieee » Mon Aug 17, 2015 11:06

That's so cool.

It's a different design from the more traditional one. I've not heard of doing it this way before. It'd be great if they managed to build it.

Of course space elevators of all types will become so passé once they get the magic space drive working.

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Re: Astrophysics and astronomy and space things

Post by humblebee » Tue Aug 18, 2015 21:59

I love the idea that there's a traditional style of space elevator :)

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tonieee
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Re: Astrophysics and astronomy and space things

Post by tonieee » Wed Aug 19, 2015 16:44

humblebee wrote:I love the idea that there's a traditional style of space elevator :)
Actually I've since read some things were people are complaining that this isn't a space elevator at all. Just a very tall tower.

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Re: Astrophysics and astronomy and space things

Post by crystalball » Wed Aug 19, 2015 19:34

Oh tonieee, please tell us more!

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Re: Astrophysics and astronomy and space things

Post by tonieee » Wed Aug 19, 2015 20:52

crystalball wrote:Oh tonieee, please tell us more!
I'm no where near an expert and what I know comes from reading science fiction (especially Red Mars by Kim Stanley Robinson) rather than actual science. The way they are supposed to work is you have a big weight (like an asteroid) in orbit with a cable attached to the ground. The centrifugal (or is it centripetal? I get confused which is which) force of the weight keeps the cable under tension. Then you can attach vehicles to the cable and send them up and down it at a fraction of the energy required using rockets (though a lot slower).

The big problem with making them is having a material strong enough to make the cable out of that can hold the weight of itself (as it'll be many miles long). There didn't used to be anything that had a high enough strength/weight ratio but I think I've read carbon nanotubes can do the job.

It's a really cool idea and would be brilliant if we could make one.

My favourite space elevator story is from Red Mars when the group trying to free themselves from Earth control detach the cable from the asteroid on the space elevator on Mars and it falls, wrapping itself round the planets equator twice and reaching such high speeds as it falls that it melts the rock where it lands and creates a trench of diamond and other rare carbon materials. It's such a great scene that it is referenced in another book that I've read with a space elevator. I'd love there to be a film to be made of it but they'd probably ruin the rest of the books - especially the left wing politics/economics.

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Re: Astrophysics and astronomy and space things

Post by noLooking » Thu Aug 20, 2015 14:20

There's an Arthur C. Clarke book written with this theory at the centre of it. They make the thread out of diamond if I remember rightly.

http://www.amazon.co.uk/Fountains-Parad ... r+c+clarke

I think he uses it in the 'Time Odyssey' trilogy as well.

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Re: Astrophysics and astronomy and space things

Post by tompony » Thu Aug 20, 2015 14:27

As usual, the Usborne Book of the Future contains all of the best possible science.
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tonieee
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Re: Astrophysics and astronomy and space things

Post by tonieee » Thu Aug 20, 2015 15:08

andyi wrote:There's an Arthur C. Clarke book written with this theory at the centre of it. They make the thread out of diamond if I remember rightly.

http://www.amazon.co.uk/Fountains-Parad ... r+c+clarke

I think he uses it in the 'Time Odyssey' trilogy as well.
I've not read Fountains Of Paradise, I'll have to check it out.

Time Oddysey I've not read yet but it is part of my every increasing collection of unread books.

noLooking

Re: Astrophysics and astronomy and space things

Post by noLooking » Thu Aug 20, 2015 18:16

tonieee wrote:It's a really cool idea and would be brilliant if we could make one.
It's amazing the range of expertise that you get in indiepop : )

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tonieee
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Re: Astrophysics and astronomy and space things

Post by tonieee » Thu Aug 20, 2015 18:41

andyi wrote:
tonieee wrote:It's a really cool idea and would be brilliant if we could make one.
It's amazing the range of expertise that you get in indiepop : )
Next year will see the inaugural indietracks space elevator. As well as watching bands on the train you'll be able to see them in space!

noLooking

Re: Astrophysics and astronomy and space things

Post by noLooking » Thu Aug 20, 2015 19:00

I think you have to do it on or near to the equator, in order to profit from the spin of the planet fully. Perhaps time to start thinking seriously about that island?

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Re: Astrophysics and astronomy and space things

Post by tonieee » Thu Aug 20, 2015 19:30

That's why the plan also involves altering the spin of the earth so that the equator will now run through Alfreton.

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Re: Astrophysics and astronomy and space things

Post by tonieee » Sun Aug 23, 2015 10:20

tonieee wrote:
andyi wrote:There's an Arthur C. Clarke book written with this theory at the centre of it. They make the thread out of diamond if I remember rightly.

http://www.amazon.co.uk/Fountains-Parad ... r+c+clarke

I think he uses it in the 'Time Odyssey' trilogy as well.
I've not read Fountains Of Paradise, I'll have to check it out.

Time Oddysey I've not read yet but it is part of my every increasing collection of unread books.
Yesterday I bought Fountains Of Paradise from a second book shop on Sharrow Vale Road that I previously didn't know existed that has a fantastic collection of sci-fi books. I also got a compilation of two Ursula Le Guin novels. Then I accidently went to Sharrow Festival and got really rained on. Really, really rained on. Afterwards I checked in my bag mainly because I was really concerned that the posh tea I'd bought which were in paper bags would be ruined but they were dry. This morning I went to get the things out of my bag and the books, which were at the bottom of the bag under the tea, were absolute sodden messes :-(. They're currently drying in the sun in my back garden.

noLooking

Re: Astrophysics and astronomy and space things

Post by noLooking » Sun Aug 23, 2015 12:51

Ouch. Will they be readable, do you think?

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