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Semimajor axis of orbit by scratch azazel
The orbit of a spacecraft about the sun has a perihelion distance of 0.1 AU and an aphelion distance of 0.4 AU. I believe the semimajor axis of orbit is 0.4 -...
September 10th 03 04:02 PM
by G.P Go to last post
3 1,484
New Findings Could Dash Hopes for Past Oceans on Mars by Steve Willner
In article , Eric Crew writes: Only a minority of planetary nebulae are like small rings or...
September 10th 03 01:25 PM
by William C. Keel Go to last post
4 221
Telescope resolution - What is limiting factor? by John Honan
Newbie question. What is the main limitation of telescopes that causes the image to lose contrast/sharpness as the magnification is increased? Is it mainly due...
September 10th 03 12:53 PM
by Ray Go to last post
6 409
Cosmological ?s by Mike
True north will make its closest approach to Polaris at the end of the 21c. Does anyone know the exact year? And will it later head back towards Thuban in...
September 10th 03 08:40 AM
by Odysseus Go to last post
5 197
Celestron C8 and collimation by Jon Hunter
Hello, I've been lurking for a bit now, nice to see such a variety of people here! I had a small question. My Dad gave me his Celestron C8 that he...
September 10th 03 05:34 AM
by Jon Hunter Go to last post
2 171
New Findings Could Dash Hopes for Past Oceans on Mars by Steve Willner
In article , (John Curtis) writes: My reference claims that the largest...
September 9th 03 11:49 PM
by Steve Willner Go to last post
2 124
accuracy of Orion Telescopes clock drives by Robb Spring
Can anyone comment on the accuracy of Orion Telescopes clock drived for their EQ series (1 or 2, in particular) tripods? The drives I am refering to, are...
September 9th 03 10:10 PM
by Roger Halstead Go to last post
2 258
Asteroid 2003 QQ47's Potential Earth Impact in 2014 Ruled Out by Ron Baalke
http://neo.jpl.nasa.gov Asteroid 2003 QQ47's Potential Earth Impact in 2014 Ruled Out Paul W. Chodas and Steven R. Chesley NASA's Near Earth Object Program...
September 9th 03 09:22 PM
by Darrell Go to last post
7 398
Astrohumanics by Painius
A proposal for a new area of study... Astrohumanics Astrohumanics : the branches of learning regarded as having primarily a cultural character,...
September 9th 03 08:42 PM
by Painius Go to last post
2 161
Meade 8" LX200 schmidt Cassegrain telescope for sale - UK by Graham Wilkinson
Hi folks, My trusty 8" Meade LX200 schmidt Cassegrain telescope is now up for sale, as I haven't got the space or the time to devote to it now. It might be of...
September 9th 03 08:35 PM
by Graham Wilkinson Go to last post
0 353
Winter Solstice by scratch azazel
Thanks to all who helped me with my last 2 questions. I have another question but I don't know if it can be explained without a model or diagram. If I live...
September 9th 03 06:36 PM
by Bill Hennessy Go to last post
3 320
More Universes by Bill C.
Is it possible, or ever been postulated and discounted, that what is driving the acceleration of our universe's outward spread, is not energy contained within,...
September 9th 03 03:39 PM
by G=EMC^2 Glazier Go to last post
5 217
Did The Chinese Invent the Telescope ??? by G=EMC^2 Glazier
Well I read that eye glasses were invented in China. We are told that a Dutch lens-grinder (Hans ????) can't think of his last name invented the telescope in...
September 9th 03 03:31 PM
by G=EMC^2 Glazier Go to last post
4 329
The Planet that Won't Go Away by Ron Baalke
http://science.nasa.gov/headlines/y2003/08sep_goaway.htm The Planet that Won't Go Away NASA Science News September 8, 2003 Mars' closest approach to Earth...
September 9th 03 01:11 PM
by Paul F. Aubin Go to last post
6 238
telescope by GoodGuy
Telescoop Dobson mirror 13. 8' (35 cm) Full autom. with pc. incl laptop + filter + 3 oculairs (25-10&6mm) and tools. Long:1800 mm. Nieuwprice mt drive: 4000...
September 9th 03 12:47 PM
by Marcel Kanon Go to last post
1 130
WILL SAO 257648 Ever be viewable from Austin? by Darrell
RA 285.86885417 DEC -76.11558555 RA: 19h 04m 01.397s Dec: -7606'25.062" RA: 19h 03m 29.115s Dec: -7606'55.782" (Epoch 2000) Azm: 18207'26" Alt:...
September 9th 03 07:56 AM
by Darrell Go to last post
7 251
How much should my refractor slide in its rings? by Bruce W...1
My 4" refractor is used with an equitorial mount. It took awhile to find mounting rings that were the right size. The rings are lined with felt and fit the...
September 9th 03 07:18 AM
by Roger Halstead Go to last post
5 232
Foucault's Pendulum Experiment by SPAWN OF A JEWISH CARPENTER: CINDY SMITH
I'm reading an introductory book on astronomy called _Discovering Astronomy_ by William H. Jeffrys and R. Robert Robbins. On page 7 is a description of the...
September 9th 03 12:01 AM
by Jonathan Silverlight Go to last post
7 361
I've got a great new astronomy hobby! by Bruce W...1
I've got a great new astronomy hobby! It's figuring out how my equitorial telescope mount works. I thought I had it all figured out then I discovered that...
September 8th 03 10:53 PM
by Bruce W...1 Go to last post
5 274
I Feel Like Ranting ! by Painius
rant Yeah i do! For years i've been reading and watching movies and TV shows that are sooooo HOPEFUL about finding ETI life. Maybe it's a *good* thing that...
(Multi-page thread 1 2 3)
September 8th 03 10:39 PM
by Painius Go to last post
20 413
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