Search found 9 matches

by 60moo
Thu Jan 03, 2013 3:26 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: The Einstein Cross Gravitational Lens (2013 Jan 02)
Replies: 41
Views: 7066

Re: APOD: The Einstein Cross Gravitational Lens (2013 Jan 02

And Chris / Owlice, when the mainstream itself agrees that the mainstream theory / model is incomplete, engendering at best a consensus belief, then is any challenge to the theory / model, using scientific principles e.g. observation - from people who are not convinced of the theory - generally not ...
by 60moo
Thu Jul 14, 2011 2:06 am
Forum: The Library: Information Desk and Educational Resources
Topic: Do any stars exist in isolation...
Replies: 3
Views: 1032

Re: Do any stars exist in isolation...

Chris and Ann - thank you for your speedy replies!
by 60moo
Wed Jul 13, 2011 4:03 pm
Forum: The Library: Information Desk and Educational Resources
Topic: Do any stars exist in isolation...
Replies: 3
Views: 1032

Do any stars exist in isolation...

...or must they belong to a cluster or galaxy? Can we actually detect "hermit" stars? If so, is it inevitable that they will one day end up as part of a group? Is there a particular size below which a star tends to be isolated?
by 60moo
Wed Aug 25, 2010 4:21 pm
Forum: The Bridge: Discuss an Astronomy Picture of the Day
Topic: APOD: A Milky Way Shadow at Loch Ard Gorge (2010 Aug 23)
Replies: 25
Views: 4644

Re: APOD: A Milky Way Shadow at Loch Ard Gorge (2010 Aug 23)

For anyone wishing to holiday in Australia, I recommend you don't miss touring the Great Ocean Road, of which the Loch Ard Gorge is one of its many wonderful natural features. One curiosity: Visiting the graveyard of a nearby 1800's township, almost all the tombstones upon inspection revealed ages o...
by 60moo
Sun Jun 06, 2010 1:44 am
Forum: The Library: Information Desk and Educational Resources
Topic: Complex concepts explained through analogy
Replies: 24
Views: 2542

Complex concepts explained through analogy

Let's face it - most people don't understand scientific concepts, let alone understand ideas relating to quantum physics or astronomy. Yet pretty well everybody has at least some fascination for the Universe. Even with my very limited knowledge, I've derived some satisfaction attempting to describe ...
by 60moo
Mon May 31, 2010 9:11 am
Forum: The Library: Information Desk and Educational Resources
Topic: UT: Universe Puzzle #1
Replies: 26
Views: 1857

Re: UT: Universe Puzzle #12

Which is the "odd one out"? And why? α, β, γ, μ, ν, and τ. In case the Greek symbols don't display properly, these are (lower case, or small) alpha, beta, gamma, mu, nu, and tau. Given the sequence of the above letters, definitely "tau". You won't find this letter in the famous ...
by 60moo
Sat May 29, 2010 4:58 pm
Forum: The Library: Information Desk and Educational Resources
Topic: And the real reason for expansion is ....
Replies: 112
Views: 13500

Re: And the real reason for expansion is ....

Thank you Beta - now I'm on track! :D Your answer has changed my ideas about "mass" from the concept of a quantity in the way that increasing the mass of a half cup of sugar can be achieved by adding more sugar, to one of mass simply being the potential of a body to be affected by an energ...
by 60moo
Wed May 26, 2010 3:56 pm
Forum: The Library: Information Desk and Educational Resources
Topic: And the real reason for expansion is ....
Replies: 112
Views: 13500

Re: And the real reason for expansion is ....

How else can a photon leave a surface already at 186,000 miles per second? It's been 30 years since I studied physics at uni, but I always thought that a photon is never at rest, and that once it comes into existence, the acceleration from an outside observer's reference frame is infinite - or mayb...
by 60moo
Sat Apr 10, 2010 1:49 pm
Forum: Starship Asterisk: Handbook
Topic: Is the Asterisk board intimidating?
Replies: 33
Views: 7319

Re: Is the Asterisk board intimidating?

Playing devil's advocate, though, I wonder how I would feel posting on a music board where I knew professional musicians posted. I am not a musician, and I can see feeling intimidated there myself. And I don't know how that could be appeased. A very successful, growing, and well-moderated website d...