Q - a movie of sublimation of an ice cube played in reverse might appear exactly to be be a cube crystal forming.Qev wrote:All this tells anyone is that they need to learn the differences between melting and crystallization.
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- Mon Jan 12, 2009 5:44 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Time
- Mon Jan 12, 2009 5:39 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Time
G'day from the land of ozzz When the chinese whisper is applied to TIME, we end up with many fantasy models, of time machines, black hole dimensions and the actual ability to change time. According to everything I've read, PHDs all of them, time travel is a definite reality which simply has not bee...
- Mon Jan 12, 2009 5:33 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: Oooooooooooh! Lovely! APoD 11/1/9.
- Replies: 18
- Views: 3487
Re: Oooh! Lovely! In Saturn's Shadow (2009 Jan 11)
All I can say is, Like Wow, Man, What a Photo! And I thought (censored for youth's sake) was a trip!
- Sat Jan 10, 2009 3:47 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Time
I've read both responses (oops, now there are three) and probably they might have been slightly different if I had had more time to explain my topic .. but I have no internet at home, and use public access computers with restricted time, and I was cut off by the public library's closure before I cou...
- Fri Jan 09, 2009 9:39 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Time
A movie of an ice cube melting will show time passing .. play the movie backwards and it is 'obvious' the movie is played in reverse. However, film the growth of certain crystals which form into cubes, cubes upon cubes, that someone not familiar with these cubes will think the film is being played b...
- Fri Jan 09, 2009 9:34 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
You know Astro, I'm almost at the same state of mind. But perhaps my family difficulties are just weighing heavy .. a daughter in emotional trouble. Astronomy barely seems important right now, but maybe my curiousity will improve with time. But at times like this, when we can easily see how little w...
- Fri Jan 09, 2009 6:43 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of Light not Constant?
- Replies: 28
- Views: 2872
Re: Speed of Light not Constant?
Hello IPRider, Gravity affecting time is not by any means something new. It is not a new idea, a left-of-center concept or a new revelation of any sort. Nor is the variations in the speed of light. Oh, it may take a little longer for light to reach us (observers) because of a gravity well, or not a...
- Thu Jan 08, 2009 5:56 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Dark Energy Clues
- Replies: 8
- Views: 1424
Re: What Can Swiss Cheese Teach Us About Dark Energy?
What Can Swiss Cheese Teach Us About Dark Energy? NASA Mission News - Fermilab/JPL - 2008 Dec 22 http://www.jpl.nasa.gov/news/features.cfm?feature=1988 A group of researchers from Fermi National Accelerator Laboratory in Batavia, Ill., recently invoked what's called the Swiss-cheese model of the un...
- Thu Jan 08, 2009 5:49 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
The speed of light can be slowed dramatically--to almost walking speed in a laboratory. Google should help. Here's a very recent article, 38 mph*, <http://query.nytimes.com/gst/fullpage.html?res=9403E6D91F3AF93BA25751C0A96F958260>. From time to time, Nova shows a three part (2?) series on the lowes...
- Thu Jan 08, 2009 5:25 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Can You Recommend A Good Café?
- Replies: 11
- Views: 2052
Re: Can You Recommend A Good Café?
Starlight Cafe?
- Thu Jan 08, 2009 5:20 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
How it can be categorically said that "The speed of light doesn't change"? You can only read that in what I said if you take it out of context. The discussion (as such) was not about the speed of light in a medium, but about the speed of light in a vacuum, subject only to different streng...
- Thu Jan 08, 2009 5:13 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
The speed of light can be slowed dramatically--to almost walking speed in a laboratory. Google should help. Here's a very recent article, 38 mph*, <http://query.nytimes.com/gst/fullpage.html?res=9403E6D91F3AF93BA25751C0A96F958260>. From time to time, Nova shows a three part (2?) series on the lowes...
- Thu Jan 08, 2009 5:08 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
... gravity is so weak that 'it is said' that galaxies cannot be held together by it, so Dark Matter was theorized as accounting for the shape of spiral gravities. ... Dark Matter was proposed as a solution to the "missing mass problem", gravitational effects were observed that couldn't b...
- Wed Jan 07, 2009 9:17 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
If space and time were locked time would not alter so quickly and at such infinitesimal distances on the cosmological scale. Time and space are separate entities co-existing for mutual benefit at times in some spaces, but capable of existing separately from each other, and because they are capable ...
- Wed Jan 07, 2009 6:39 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
:shock: Where such a free environment of gravity field reside. Because for now where ever we look we see the gravity field effect everywhere. All i read up to now is that the gravity field extand to infinity. It may be weak at some place but it is there even if weak. And dark matter seem to exist a...
- Wed Jan 07, 2009 6:25 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
Consider that time runs faster the higher up we go in a gravity field, speed of light in relation to sea level time will increase the further 'up' we go... The speed of light doesn't change. Space and time are locked together; while the rate a clock runs changes, so does the spatial metric. If spac...
- Wed Jan 07, 2009 5:20 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Speed of light
- Replies: 1021
- Views: 48640
Re: Speed of light
Consider that time runs faster the higher up we go in a gravity field, speed of light in relation to sea level time will increase the further 'up' we go, therefore, once we escape gravity fields completely, (not just earth's field, or the sun's field, or our group of galaxy's field .. but all gravit...