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Ye Olde Towne Crier (News) (Read 104761 times)
abyssoft
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Re: Ye Olde Towne Crier (News)
Reply #60 - 11/18/06 at 09:44:14
 
Just a quick warm fuzzy for those of us here...
 
If you enter the following
 
gravity simulator
 
and choose "I'm feeling lucky" on google you come here Cool
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Re: Ye Olde Towne Crier (News)
Reply #61 - 11/30/06 at 17:20:25
 
"New paradigm" for stable circumlunar orbits:
 
http://science.nasa.gov/headlines/y2006/30nov_highorbit.htm?list14592
 
I think this has something to do with Kozai, that critical angle of 39.6° that they mention in the appendix looks awfully familiar...
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Re: Ye Olde Towne Crier (News)
Reply #62 - 11/30/06 at 18:46:13
 
I bet I know what simulation is running on your computer now  Grin
 
Even in the linked paper, he does not mention the Kozai Mechanism as the cause.  But his description of why these orbits are unstable describes the Kozai Mechanism quite nicely.  I'd be mad if I were Professor Kozai. Angry
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Re: Ye Olde Towne Crier (News)
Reply #63 - 12/15/06 at 10:09:59
 
you know...  I just read this article online...  well.. I shoudl say I sketched through it.  The graphic for it reminded me of Gravity Simulator.
 
I'm sure NASA has their own stuff, but hey...  Smiley
 
http://www.universetoday.com/2006/12/14/tag-an-asteroid-win-a-prize/
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Re: Ye Olde Towne Crier (News)
Reply #64 - 01/10/07 at 10:12:46
 
Dying Star Builds Planets  
 
http://www.space.com/scienceastronomy/070110_mira_disk.html
 
Now if only I can figure a way to simulate this ....
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Re: Ye Olde Towne Crier (News)
Reply #65 - 01/11/07 at 09:25:29
 
Nice evalution ...
Indeed hard to simulate..must be a mix between fluid mechanics and gravitation .
A couple of days ago I wondered how it is possible to simulate dark matter and the motion of planets in such a field . Suppose the solar system is filled with dark matter fi. the mass of 10 jupiters , but homogeneous . How would the planets behave , or do they already behave in such a way ?
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Re: Ye Olde Towne Crier (News)
Reply #66 - 01/30/07 at 12:03:21
 
Trojans at Neptune,  
(The Greeks are in for it now lol....)
 
http://www.space.com/scienceastronomy/070130_st_neptune_trojans.html
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Re: Ye Olde Towne Crier (News)
Reply #67 - 01/31/07 at 10:13:57
 
Asteroids missing us  or hitting us ...., when ...?  
 
There are some beautiful sites on the net like the NEAR site of Nasa/JPL showing the orbits of the known asteroids .  
Some of them allow the generate the ephemerides , which can be used in GravSim .  
In search of a table of forecasted "close approaches" i found among others this site...  
 
http://cfa-www.harvard.edu/iau/lists/CloseApp.html  
 
This site seems to be updated daily ...  
In the next 2 years it is known that +/- 314 of them will come close within 0.2 AU ( ca. 8 times Lunar Distance ) to the earth.  The figures of this site can be exported ...  
Looking at the distribution of distances ( "miss" distance) the cumulative distribution looks linear ... No  known asteroid of this 314 will hit the earth  , however the line can be extrapolated to the  radius of the earth , showing that one of these ( yet to be discovered ) can hit the earth in a time span of 2 years .  I created an excel file for these ....
 
Remarkable is the fact that often new asteroids are discovered  on their way to earth , getting pretty close...
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« Last Edit: 02/02/07 at 01:10:45 by frankuitaalst »  

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Re: Ye Olde Towne Crier (News)
Reply #68 - 01/31/07 at 21:29:31
 
Recipe Revealed for Layer-Cake Atmosphere of a Baking Planet  Shocked
 
http://www.space.com/scienceastronomy/070131_cake_planet.html
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Re: Ye Olde Towne Crier (News)
Reply #69 - 02/17/07 at 02:51:04
 
Still a long time to go , 5 years , to the next Venustransit on june 6th 2012
Heres a link to the Nasa-site  
http://sunearth.gsfc.nasa.gov/eclipse/transit/venus/Sun2004+2012-1.GIF.  
Simulating with high precision gave the following image . Seems to mach  Smiley
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Re: Ye Olde Towne Crier (News)
Reply #70 - 03/03/07 at 13:26:46
 
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Re: Ye Olde Towne Crier (News)
Reply #71 - 03/03/07 at 14:05:43
 
Live : lunar transit , from Belgium .
http://www3.mira.be/lunar-eclipse-070303.html
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Re: Ye Olde Towne Crier (News)
Reply #72 - 03/27/07 at 18:18:39
 
Pressure of Light Can Move Liquid
http://www.livescience.com/technology/070327_laser_jet.html
 
hmm I wonder could photonic radiative pressure be one of the components of dark energy.
 
Bizarre Hexagon Spotted on Saturn  
http://www.space.com/scienceastronomy/070327_saturn_hex.html
and it's counterpart
Freak One-Eyed Monster Storm Spotted on Saturn  
http://www.space.com/scienceastronomy/061109_monster_storm.html
Just plain weird  Shocked
 
Newfound Data Could Solve NASA's Great Gravity Mystery  
http://www.space.com/scienceastronomy/070327_scitues_pioneeranom.html
 
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Re: Ye Olde Towne Crier (News)
Reply #73 - 03/28/07 at 21:55:22
 
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frankuitaalst
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Re: Ye Olde Towne Crier (News)
Reply #74 - 03/29/07 at 09:18:44
 
Quote from abyssoft on 03/28/07 at 21:55:22:

seems weird and is promising .  
Remembers me to an article I read some time ago about an experiment which is going to be set up at the big collider ( Switserland ) where scientists will try to measure the amount of light which comes out at the end of a metal block a couple of foot thick , when hit by a strong light beam . Seems that light converts in the material into other particles , which recombine again at the end and come out as light ...Have to pick up the article  
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