Search found 752 matches
- Wed Jun 08, 2011 8:43 pm
- Forum: The Library: Information Desk and Educational Resources
- Topic: can we make our velocity faster then light!
- Replies: 3
- Views: 4352
Re: can we make our velocity faster then light!
Welcome to Starship Asterisk* nova666! :ssmile: It is relatively (pun unintended) easy to make something which appears to move faster than the speed of light; for example, if you go far enough away from a lighthouse, its beam will appear to move across a sheet of paper that you hold in your hands fa...
- Wed Jun 08, 2011 8:35 pm
- Forum: The Library: Information Desk and Educational Resources
- Topic: Where do all the gases go that are photoevaporated ?
- Replies: 19
- Views: 3690
Re: Where do all the gases go that are photoevaporated ?
I'm a bit surprised no one has attempted to reply to dougettingers question, in over a month! :P Nereid wrote :?: :?: I thought you were a Legend from long ago that had faded off into the sunset never to return. Well, Welcome back! YEE-HAA :cowboy: Thanks Beyond. Until fairly recently I too thought...
- Wed Jun 08, 2011 8:30 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Looking for the source (and exact quote) - help please!
- Replies: 6
- Views: 1150
Re: Looking for the source (and exact quote) - help please!
A long silent thread.
Thanks for the responses; however, none are what I was looking for.
I distinctly remember the line "communicate [via] notes left with the night watchman" (or similar).
Thanks for the responses; however, none are what I was looking for.
I distinctly remember the line "communicate [via] notes left with the night watchman" (or similar).
- Wed Jun 08, 2011 8:26 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: How quickly are new objects detected?
- Replies: 4
- Views: 1778
Re: How quickly are new objects detected?
I too am interested in what others may have to say on this topic ...Javachip wrote:I am bumping this thread in case anyone else has any comments. Many thanks to those who already replied.
- Tue Jun 07, 2011 7:54 pm
- Forum: The Library: Information Desk and Educational Resources
- Topic: Where do all the gases go that are photoevaporated ?
- Replies: 19
- Views: 3690
Re: Where do all the gases go that are photoevaporated ?
The photoevaporation process creates "fingers" or "elephant trunks" behind EGGS(evaporating gaseous globules), erodes protoplanetary disks, planetary atmospheres, and the surrounding regions of a star entering the main sequence. The word is a misnomer because evaporation or a ph...
- Tue Jun 07, 2011 7:07 pm
- Forum: The Library: Information Desk and Educational Resources
- Topic: Gravity, relativity, physics, and science
- Replies: 0
- Views: 722
Gravity, relativity, physics, and science
There are, in my experience, quite a lot of people interested in astronomy and its related fields, astrophysics and cosmology; also, in how astronomy can be used to test theories of physics. Some such people come to this topic with backgrounds and experiences far different from those of the regulars...
- Sat Mar 07, 2009 11:44 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Looking for the source (and exact quote) - help please!
- Replies: 6
- Views: 1150
Looking for the source (and exact quote) - help please!
I vaguely remember reading a well-written sentence, or para, on astronomers, two types of them, and how neither ever looked through the eyepiece of telescopes. However, I can't track it down, and it's bugging me. It goes something like this (much better written, of course): "There are two kinds...
- Wed Jan 21, 2009 1:45 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Red Shift Alternative
- Replies: 34
- Views: 2844
Re: Red Shift Alternative
aristarchusinexile, when you've developed your idea to the point of writing a paper and submitting it to a relevant, peer-reviewed journal, please let us know, and we can continue discussing it. Alternatively, if you'd like to put it through a much, much milder review process, but one that nonethele...
- Sun Jan 18, 2009 10:45 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Redshift - Motion or gravity? (APOD Jan-04, 2009)
- Replies: 31
- Views: 4532
Re: Redshift - Motion or gravity? (APOD Jan-04, 2009)
Then to study the red shift of a gravity well create by a black hole, they have to be relatively close to us or their effect will be mix with the gravity well of its galaxie in wich the gravity well of the black hole is. :? I don't think it much matters how far away a black hole is to observe a gra...
- Thu Nov 13, 2008 8:17 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
So how do you decide, Sputnick, which bits of what Einstein said you regard as correct, and which you regard as not correct? arent we all do it same way? by comparing to our own oppinion? I know my questions and comments have, in other fora, been called pedantic; it may well be that some readers he...
- Thu Nov 13, 2008 8:01 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Could Dark Matter Possibly Be . . .
- Replies: 315
- Views: 27535
Re: Methods for estimating the age of the universe
When may readers expect to see the first post presenting support for your inflammatory remarks? A post which, I hope, will outline the scope of that support, summarise the nature of that support and key arguments, and make a firm commitment to providing references to peer-reviewed papers published ...
- Thu Nov 13, 2008 7:45 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
If you won't listen to Einstein, you're not going to listen to me .. and your comment certainly validates what I have been saying, that your mind is closed. I'm happy to listen to Einstein. Like I said, he was a clever guy, and said lots of good things (outside the realm of science). Many I agree w...
- Thu Nov 13, 2008 6:44 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
with Redshift itself being explainable in ways other than expansion. Nobody has had any success explaining redshift in this context as anything other than a relativistic consequence of the expansion of space. The failure to identify any other plausible mechanism is one of the reasons that the BBT i...
- Thu Nov 13, 2008 6:24 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
hint: you may start from comparing initial value of expansion rate given by Hubble and its current value. Exactly - the initial Hubble measurement did not stand up to the theory so it was altered .. an elementary and necessary fudge .. with Redshift itself being explainable in ways other than expan...
- Thu Nov 13, 2008 6:11 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Could Dark Matter Possibly Be . . .
- Replies: 315
- Views: 27535
Re: Methods for estimating the age of the universe
But maybe I'm wrong (I freely admit that I have been wrong in the past, and will certainly be wrong again in the future). Let's see Sputnick back up his inflammatory remarks, starting with a compilation of the key papers. ^ "The supposed age of the Big Bang universe has been changed every time...
- Thu Nov 13, 2008 6:05 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: The origin of Dark Energy
- Replies: 46
- Views: 2633
Re: The origin of Dark Energy
[...] Religion? I made one historically accurate comment exploring with Chris whether or not it was electrical/magnetic repulsion which allowed Jesus to walk on the water, whether the soles of his feet got wet or not, and I am said to be making comments about religion? More wit perhaps: " and ...
- Thu Nov 13, 2008 5:18 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
It's really a beautiful example of science at its finest. On the anti-side, I see it as a perfectly clear example of a theory not being supported by progressive discoveries, the theory being crudely re-sculpted to fit advancing information. Do you? Would this be, by any chance, the BBT? If so, then...
- Thu Nov 13, 2008 5:14 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
Nereid - you admit and quote your own post where you said Plasma Cosmology is not science, so what further proof is needed? Sputnick, this matters a great deal, for at least two very good reasons. First, as I have already noted, if you cannot get right something as simple and straight-forward as a ...
- Thu Nov 13, 2008 4:04 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Could Dark Matter Possibly Be . . .
- Replies: 315
- Views: 27535
Methods for estimating the age of the universe
From BMAONE23's list, since Hubble, there seem to be four methods: * estimate H(0) and derive the age from cosmological models (H(0) becomes an input to these models) * estimate the age of old white dwarfs, the age of the universe is then something greater than this * estimate the age of some old st...
- Thu Nov 13, 2008 3:42 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Could Dark Matter Possibly Be . . .
- Replies: 315
- Views: 27535
Re: Could Dark Matter Possibly Be . . .
=Nereid Chris P will, no doubt, write his own response ... mine is as follows: what is the relationship between Kant's writing (on island universes) and science? Page 125 from the oft and should be read book - "Island universes (Galaxies) "A concept contemplated by the great German philos...
- Thu Nov 13, 2008 2:17 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
[...] it is up to its [the Big Bang's] proponents to convince me .. Oh? How did you come to be the arbiter of modern cosmological theories? which they are decreasing their chances of ever doing with their excuses as to why the theory fails with each new discovery, It does? Would you mind listing te...
- Thu Nov 13, 2008 2:07 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Could Dark Matter Possibly Be . . .
- Replies: 315
- Views: 27535
Re: Could Dark Matter Possibly Be . . .
Interesting inputs, thanks BMAONE23. Upon checking, there seem to be some inaccuracies ... [...] This site has references to various articles about the age of the universe. http://www.ldolphin.org/univ-age.html Not a very reliable webpage, IMHO ... Appx. 1995 9.5 billion Nial Tanvir Nature 7 Septemb...
- Thu Nov 13, 2008 1:30 am
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: What is Science?
- Replies: 132
- Views: 8148
Re: What is Science?
Did I say that? If so, where? (specific quote from a post I wrote please). "Plasma Cosmology is not science." the day is bright - the sun is shining - I'm leaving this computer. Would you mind trying again please Sputnick? You wrote: I ask again (with clearer language) the unanwered quest...
- Wed Nov 12, 2008 11:20 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Could Dark Matter Possibly Be . . .
- Replies: 315
- Views: 27535
Re: Could Dark Matter Possibly Be . . .
I can't wait for the larger proposed telescopes to be built and brought on line then we will have a better understanding about BBT and others. After all, the universe can't be 13.7 billion years old if we then find objects that we equate to 17 GYR away. But would an older universe preclude the BBT?...
- Wed Nov 12, 2008 11:16 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: The origin of Dark Energy
- Replies: 46
- Views: 2633
Re: The origin of Dark Energy
Nereid - I may have quoted the wrong page number of that book relating to Verschuur's "may not be related to mass" - page 349. As I said already here, I've read nothing in science magazines including this months' that contradict anything in Through a Universe Darkly .. and therefore canno...