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boards.ie String Theory  
18:42 2-Dec-07   [Replies: 1, Views: 125]    By: Screwthe unions
Could anyone direct me to a site that can give basic understanding to string theory? Im trying to get to grips with an article in Scientific American and makes constant references to string th...
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PhysicsForums Superclusters and Voids -- same curvature?  
22:37 30-Nov-07   [Replies: 18, Views: 158]    By: Unnamed
According to the mainstream 'standard model', is the geometric curvature of space believed to be exactly the same within superclusters as it is in within voids? In other words, does the much highe...
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PhysicsForums Is the cosmological prinicple wrong? Is Big Bang wrong?  
00:59 30-Nov-07   [Replies: 62, Views: 1224]    By: Unnamed
This is a big hole in the sky. Although you can't see it with the naked eye it actually covers almost 3 degrees of the sky, and to put that into perspective the full Moon covers about half a degree! ...
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Trickery Mars Attack  
10:54 29-Nov-07   [Replies: 11, Views: 381]    By: Inertiaman
http://news.bbc.co.uk/1/hi/sci/tech/7116834.stm [http://news.bbc.co.uk/1/hi/sci/tech/7116834.stm]> http://www.nasa.gov/mission_pages/c...main/index.html [http://www.nasa.gov/mission_pages...
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PhysicsForums The multiverse  
21:58 28-Nov-07   [Replies: 2, Views: 44]    By: Unnamed
http://arxiv.org/PS_cache/arxiv/pdf/...711.4460v1.pdf [http://arxiv.org/PS_cache/arxiv/pdf/0711/0711.4460v1.pdf]> This is only a couple of pages....
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Trickery A first in history: solar power cheaper to produce than burning coal  
10:14 28-Nov-07   [Replies: 22, Views: 539]    By: Norfolk'n'Clue
Quote: The Nanosolar company was founded in 2002 and is working to build the world’s largest solar cell factory in California and the world’s largest panel-assembly factor...
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Trickery Cheoptics 360  
09:42 27-Nov-07   [Replies: 0, Views: 138]    By: Spazwankle
http://vizoo.com/showreel_wmvs/EPK_Cheoptics360_XL.wmv [http://vizoo.com/showreel_wmvs/EPK_Cheoptics360_XL.wmv]> Pretty cool ...
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boards.ie Tullamore Astronomy Society - Tues Dec 4th: Who was Galileo?  
16:59 26-Nov-07   [Replies: 0, Views: 58]    By: Seanie M
Hi all, The next TAS public lecture takes place in the Presbyterian Church & Hall, High Street, Tullamore, as follows: Date & Time: Tuesday Dec 4th @ 8pm Speaker/Topic: Deirdre...
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PhysicsForums Closed Universe  
04:01 26-Nov-07   [Replies: 3, Views: 23]    By: Unnamed
I have a question: I understand why the expansion of the universe is believed to be caused by the expansion of vacuum space, i.e. the Hubble flow. I understand that if the universe had mass/en...
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boards.ie Bright star: does anyone know its name?  
12:18 23-Nov-07   [Replies: 4, Views: 194]    By: Yorky
For the last few mornings my daughter has noticed a star in a south easterly direction which is brighter than all of the rest. Even when it is geting light and all the others have disappeared this...
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PhysicsForums lambda-CDM model and geometric units  
00:58 22-Nov-07   [Replies: 10, Views: 305]    By: Unnamed
I'm currently putting together a basic summary of the Lambda-CDM model and I have a slight issue with the fact that the equation to calculate lambda (which includes factors to convert physical units i...
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PhysicsForums Has observing the universe sealed its fate?  
22:43 21-Nov-07   [Replies: 3, Views: 90]    By: Unnamed
Mankind 'shortening the universe's life' Quote:...
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PhysicsForums neutrinos in nature  
16:18 21-Nov-07   [Replies: 5, Views: 107]    By: Unnamed
what is the best estimates on the number of neutrinos in nature?...
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boards.ie Some help....URGENTLY!!!  
10:35 21-Nov-07   [Replies: 2, Views: 126]    By: Brian_Uckfast
Does anyone here use IRAF??! I'm stuck trying to develop a simple pipeline to process images, but I can't figure out the simple things like grouping raw frames using a text editor to write the...
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Trickery Jaekelopterus rhenaniae  
01:34 21-Nov-07   [Replies: 2, Views: 213]    By: Inertiaman
http://news.bbc.co.uk/1/hi/sci/tech/7104421.stm [http://news.bbc.co.uk/1/hi/sci/tech/7104421.stm]> Imagine that bastard lashing out of a swamp at you. Fuck that! ...
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boards.ie My CCD for sale  
21:35 20-Nov-07   [Replies: 1, Views: 204]    By: redman
Hi All I jumped to fast and going to sell the Starlight Xpress MX5C I only got a couple of months ago and go the Digital camera route first. So its for sale at: http://www.adverts.ie/sho...
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Trickery Anyone sure of their physics?  
14:18 19-Nov-07   [Replies: 10, Views: 336]    By: Norfolk'n'Clue
While I was in the sauna at lunchtime, I was thinking about the little air hatch that you can open and close, and why it is such a small vent. Can anyone who knows their physics tell me whet...
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Trickery Life Straw  
12:05 19-Nov-07   [Replies: 1, Views: 198]    By: Ashen
http://www.lifestraw.com/en/high/maincont2.asp [http://www.lifestraw.com/en/high/maincont2.asp]> How cool is that? drink from any water source and it filters out 99% of bugs..of course your ...
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boards.ie Diffraction Limited Resolution?  
16:31 14-Nov-07   [Replies: 0, Views: 66]    By: sei046
Guys how do you work out the DLR? I have a primary mirror D of 2.4m and want to know the DLR at 100nm, 500nm and 2200 nm..... Is it the angle= 1.22(pi)/D ? Any help? ...
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boards.ie Orion 12in Intelliscope (Dobsonian)  
15:07 14-Nov-07   [Replies: 1, Views: 101]    By: Calibos
Following on from my other thread, I have settled on the Orion 12in Dob Intelliscope. Best of all worlds. ie. Decent optics, large apeture and Computerised object locating 'Push To'. I have em...
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PhysicsForums Please recommend books for layperson??  
03:08 13-Nov-07   [Replies: 6, Views: 119]    By: Unnamed
Hello please, I am want to do amazon.com order and am after some good non-mathematical (or beginner level maths) books about space, time, dimensions, topology, the new loop quantum gravity etc etc. Bo...
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boards.ie Telescope - Taking advantage of the $$$$  
21:10 12-Nov-07   [Replies: 2, Views: 217]    By: Easy Rider
Hi All, I know nothing about telescopes, my parents are in America for 3 weeks and want to pick one up for my brother price bracket $150 to $200 for Christmas.....nothing too fancy as my broth...
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PhysicsForums Friedmann Fun Facts  
21:56 11-Nov-07   [Replies: 23, Views: 318]    By: Unnamed
The purpose of this thread is to describe certain interesting aspects that are explicit or implicit in the “standard model” of cosmology for a flat universe, by reference to the Friedmann ...
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boards.ie Stellarium 0.91 - Anyone use it?  
21:26 11-Nov-07   [Replies: 19, Views: 534]    By: hamster
Hey anyone using Stellarium [http://www.stellarium.org/]>? It's a bit like Starry night but it is based on an free open source model. I tried it out on ubuntu during the weekend and yup it's prett...
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boards.ie Is this 12in Dob any good?  
18:04 11-Nov-07   [Replies: 3, Views: 157]    By: Calibos
Product Name Quantity Unit Price Total Delete Meade Series 4000 Eyepiece and Filter Kit with Aluminium Case £277.99 £277.99 Meade Lightbridge 12" Deluxe Dobsonian Telescope ...
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