Free Republic
Browse · Search
News/Activism
Topics · Post Article

I can't wait to see the pics as Cassini goes through the rings!
1 posted on 06/03/2004 9:35:10 AM PDT by Pyro7480
[ Post Reply | Private Reply | View Replies ]


To: petuniasevan

Ping


2 posted on 06/03/2004 9:35:29 AM PDT by Pyro7480 (Sub tuum praesidium confugimus, sancta Dei Genitrix.... sed a periculis cunctis libera nos semper...)
[ Post Reply | Private Reply | To 1 | View Replies ]

Cool (Free!) Astronomy-related Software:
Please FReepmail other suggestions
  • Celestia: (GET THIS ONE! -- m_f) A real-time space simulation that lets you experience our universe in three dimensions. Unlike most planetarium software, Celestia doesn't confine you to the surface of the Earth. You can travel throughout the solar system, to any of over 100,000 stars, or even beyond the galaxy. All travel in Celestia is seamless; the exponential zoom feature lets you explore space across a huge range of scales, from galaxy clusters down to spacecraft only a few meters across. A 'point-and-goto' interface makes it simple to navigate through the universe to the object you want to visit.
  • Sky Screen Saver: Shows the sky above any location on Earth, including stars (from the Yale Bright Star Catalogue of more than 9000 stars to the 7th magnitude), the Moon in its correct phase and position in the sky, and the position of the Sun and all the planets in the sky.
    Outlines, boundaries, and names of constellations can be displayed, as well as names and Bayer/Flamsteed designations of stars brighter than a given threshold. A database of more than 500 deep-sky objects, including all the Messier objects and bright NGC objects can be plotted to a given magnitude. The ecliptic and celestial equator can be plotted, complete with co-ordinates.
  • Home Planet: A comprehensive astronomy / space / satellite-tracking package for Microsoft Windows 95/98/Me and Windows NT 4.0/2000/XP and above. Selected features:
    • An earth map, showing day and night regions, location of the Moon and current phase, and position of a selected earth satellite. Earth maps can be customised and extended.Hposition and phase data for the Sun and Moon.
    • Panel showing positions of planets and a selected asteroid or comet, both geocentric and from the observer's location.
    • A sky map, based on either the Yale Bright Star Catalogue or the 256,000 star SAO catalogue, including rendering of spectral types, planets, earth satellites, asteroids and comets.
    • Databases of the orbital elements of 5632 asteroids and principal periodic comets are included, allowing selection of any for tracking.
    • A telescope window which can be aimed by clicking in the sky map or telescope itself, by entering coordinates, or by selecting an object in the Object Catalogue.
    • A horizon window which shows the view toward the horizon at any given azimuth.
    • Object Catalogue allows archiving images, sounds, and tabular data about celestial objects.
    • Orrery allows viewing the solar system, including a selected asteroid or comet, from any vantage point in space, in a variety of projections.
    • Satellite tracking panel. Select an Earth satellite from a database of two-line elements, and see its current position and altitude.
    • View Earth From panel allows you to view a texture-mapped image of the Earth as seen from the Sun, Moon, a selected Earth satellite, above the observing location, or the antisolar point.
    • Satellite database selection allows maintenance of multiple lists of satellites, for example TV broadcast, ham radio, low orbit, etc.
  • Cartes du Ciel Sky Charts: Enables you to draw sky charts, making use of the data in 16 catalogs of stars and nebulae. In addition the position of planets, asteroids and comets are shown.
  • SETI@Home: A scientific experiment that uses Internet-connected computers in the Search for Extraterrestrial Intelligence (SETI). You can participate by running a free program that downloads and analyzes radio telescope data.

3 posted on 06/03/2004 9:41:27 AM PDT by martin_fierro
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480
I thought that the Voyager probes showed that the "gap" in the rings isn't really a "gap" but has quite a bit of material in it.
5 posted on 06/03/2004 9:44:04 AM PDT by Question_Assumptions
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

Rings of Saturn

                         Radius   Radius/        Optical       Albedo     Thickness    Surf. Density   Eccentricity     
                          (km)     Eq. radius     Depth                      (m)         (g/cm2)
   Saturn Equator        60,268      1.000                                                                  
   D inner edge          66,900      1.110                                                
   D outer edge          74,510      1.236                                          
   C inner edge          74,658      1.239     0.05 - 0.10   0.12 - 0.30      5           1.4 - 5                                                  
   Titan ringlet         77,871      1.292                                                   17          0.00026                                                        
   Maxwell gap/ringlet   87,491      1.452                                                   17          0.00034                                 
   C outer edge          92,000      1.527         0.12          0.2          5             2 - 7
   B inner edge          92,000      1.527      0.4 - 2.5     0.4 - 0.6     5 - 10         20 - 100                                                                
   B outer edge         117,580      1.951         1.8                                                
   Cassini division                            0.05 - 0.15    0.2 - 0.4      20            18 - 20                                                                
   A inner edge         122,170      2.027      0.4 - 1.0     0.4 - 0.6    10 - 30         30 - 40                                                        
   Encke gap            133,589      2.216                                                          
   Keeler gap           136,530      2.265   
   A outer edge         136,775      2.269         0.6        0.4 - 0.6    10 - 30         20 - 30                                                       
   F ring center        140,180      2.326         0.1           0.6                                     0.0026                                                         
   G inner edge         170,000      2.82       1.0 x 10-6                    105                                                 
   G outer edge         175,000      2.90
   E inner edge         181,000      3          1.5 x 10-5                    107                                                
   E outer edge         483,000      8                                        107      

Rings, ringlets and gaps radially thinner than 1000 km are listed by center radius. 
Can't wait for the ring transition either!
6 posted on 06/03/2004 9:45:06 AM PDT by Textide
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480
The engine will burn up, allowing Saturn to pull the two-part craft, about the height of a two-story building, into orbit.

The engine will burn up?

7 posted on 06/03/2004 9:46:48 AM PDT by RightWhale (Theorems link concepts; proofs establish links)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

They should name the craft's lens Spinoza :)


10 posted on 06/03/2004 9:54:37 AM PDT by RightWingAtheist
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

11 posted on 06/03/2004 9:55:30 AM PDT by bmwcyle (<a href="http://www.johnkerry.com/" target="_blank">miserable failure)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480
And there's a 7-year-old trasnmitter in the back saying:

"Are we there yet?"
"Are we there yet?"
"Are we there yet?"
"Are we there yet?"
"Are we there yet?"
"Are we there yet?"
"Are we there yet?"

13 posted on 06/03/2004 9:56:22 AM PDT by ClearCase_guy (You can see it coming like a train on a track.)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

...The X indicates the point where Cassini will pierce the ring plane on June 30, 2004, going from south to north of the ring plane, 33 minutes before the main engine fires to begin orbital insertion. The indicated point is between the narrow F-ring on the left and Saturn's tenuous G-ring which is too faint to be seen in this exposure....

14 posted on 06/03/2004 9:57:02 AM PDT by kidd
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

BTTT


19 posted on 06/03/2004 10:05:23 AM PDT by StriperSniper (Leftism is a disease that others have that makes you feel bad.)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

NASA has a 67 page PDF press pack with some good info:

http://saturn.jpl.nasa.gov/news/press-kits/cassini-arrival.pdf


23 posted on 06/03/2004 11:06:47 AM PDT by alnitak ("That kid's about as sharp as a pound of wet liver" - Foghorn Leghorn)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: RadioAstronomer; PatrickHenry

ringed ping


24 posted on 06/03/2004 11:30:39 AM PDT by longshadow
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480
Cassini will approach the planet from the south

From the south?? Where is south in outer space???

28 posted on 06/03/2004 12:01:27 PM PDT by oldcomputerguy
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480
Can't wait!

Saturn Bump.

34 posted on 06/03/2004 12:31:00 PM PDT by DoctorMichael (The Fourth Estate is a Fifth Column!!!!!!!!!!!!!!!)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

Looking forward to this. BTTT


36 posted on 06/03/2004 12:42:06 PM PDT by Brett66
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480
4 p.m. London time on July 1,

Saturn is in Gemeni right now so wouldn't that mean on/by July 1st it's going to be behind the sun? So how are they going to get a transmittion?

39 posted on 06/03/2004 5:55:16 PM PDT by qam1 (Tommy Thompson is a Fat-tubby, Fascist)
[ Post Reply | Private Reply | To 1 | View Replies ]

To: Pyro7480

On June 11 it will fly within 1300 miles of Phoebe. This will be very exciting.


43 posted on 06/04/2004 4:44:18 AM PDT by <1/1,000,000th%
[ Post Reply | Private Reply | To 1 | View Replies ]

Free Republic
Browse · Search
News/Activism
Topics · Post Article


FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson