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How long has it taken for the universe to expand? by BURT
Space expansion brought the furthest objects to 13.7 billion light years; but expansion was below light speed. It took 22 billion years for space expansion to...
March 12th 09 03:44 AM
by Quagmire[_2_] Go to last post
3 565
Observatories open to the public in London? by [email protected]
Hi, I'm in london,england and have always wanted to see the stars through a powerful telescope. I don't own one,and so went to the Greenwich website,and the...
March 11th 09 09:46 AM
by Mike Dworetsky Go to last post
4 704
Focal length of Sun's gravitational lens by [email protected]
I have been thinking this through quite hard, but I got nowhere :( I know that stars and nebulae close to the solar disk in the sky get warped in their...
(Multi-page thread 1 2)
March 9th 09 12:59 AM
by TBerk Go to last post
19 1,092
SkyTools 3 by Philippe HAAKE
Hello, I would like to tell you, that the new version of SkyTools is now available. For me it is the best and the most complete software on the market, and...
March 9th 09 12:26 AM
by rmollise Go to last post
2 524
Compact, cheap(ish) scope? by A.Lee
Having got a little bit of a bug for star gazing again, I'd like to purchase a compact scope for occasional use. I have a cheap x60 spotting scope, which is...
March 5th 09 11:05 PM
by [email protected] Go to last post
1 614
NGC 7380 & Sh2-142 in H-alpha (field 1,4°x2,1°) by Danilo Pivato
Hi all, a new image of the autumn sky: NGC 7380 the Wizard & Sh2-142 nebula in H-alpha from Rome. I hope both of your...
March 5th 09 09:54 PM
by Danilo Pivato Go to last post
0 672
I wish white holes existed by GreenXenon
Hi: I wish white holes existed. It would make life more interesting. However, there is a problem. The existence of white holes requires that: 1. Entropy of...
(Multi-page thread 1 2)
March 5th 09 01:35 PM
by Quagmire[_2_] Go to last post
11 788
Exoplanet HD80606b transit observed from UCL's observatory at Mill Hill by Mike Dworetsky
Astronomers and a team of student observers from UCL observed the egress of the transit of this remarkable exoplanet on 13/14 Feb 2009 from Mill Hill, NW...
February 27th 09 08:09 PM
by Kev[_2_] Go to last post
1 534
Digital compact camera - low light, low weight, and threaded lens by James Harris
Has anyone had success in attaching a low weight, low light compact digital camera to a telescope eyepiece for imaging the night sky? I already have a good...
February 24th 09 03:07 PM
by macsuperfly Go to last post
6 1,215
Galileoscope by Dr J R Stockton[_17_]
The Galileoscope http://www.galileoscope.org/ may be of interest, for rather young astronomers. -- (c) John Stockton, nr London, UK. ...
February 23rd 09 11:44 AM
by bugbear Go to last post
1 687
skywatcher 127 Mak poor focus by John[_25_]
Are they any good? I purchased a skywatcher skymax 127 Mak the other day and I must say the image sharpness is the worst of any instrument I have ever used...
February 22nd 09 02:19 PM
by John[_25_] Go to last post
2 513
Russian and US satellites crash in space at 25,000mph by N_Cook
http://www.guardian.co.uk/world/2009/feb/12/nasa-alert-as-satellites-collide 50 years for the first such collision, how long before the second? and...
(Multi-page thread 1 2)
February 17th 09 11:13 AM
by Mike Dworetsky Go to last post
17 1,225
registax difficulties? by bugbear
I've had a couple more attempts at pointing my camera at the night sky. This time (at 4x zoom) I used a 2 second exposure, which means stars are pretty much...
February 12th 09 02:05 PM
by bugbear Go to last post
1 513
Cone Nebula & NGC 2264 in H-alpha (field 1,4° x 2,1°) by Danilo Pivato
Hi all, this is a new shot in Halpha from Rome (Italy). The instrument is refractor Pentax SDUF II 400/4 + ccd Sbig ST-10XME + filter H-alpha. The exposure is...
February 11th 09 06:11 PM
by Danilo Pivato Go to last post
0 901
Survey by priya
Multiple choice items are the most popular type of survey questions because they are generally the easiest for a respondent to answer and the easiest to...
February 11th 09 03:00 AM
by priya Go to last post
0 494
Survey by priya
Multiple choice items are the most popular type of survey questions because they are generally the easiest for a respondent to answer and the easiest to...
February 11th 09 02:54 AM
by priya Go to last post
0 482
stellarium planetarium program by Peter Hayes[_3_]
New version available from http://www.stellarium.org/ No connection other than as a user happy to have the same program on Mac, Linux and Windows Pete H
February 10th 09 11:02 PM
by Peter Hayes[_3_] Go to last post
0 499
streaks in the sky? by bugbear
I recently made my first attempt at photographing the night sky. I used a Canon powershot A630, and the CHDK software, to take 19 frames or 8 seconds each,...
February 9th 09 11:48 AM
by bugbear Go to last post
5 811
Time lapse skies night and day by OG
I've no connection to this site, but thought people here might enjoy it. http://vimeo.com/1250929 the HD option (default) depends on a fast connection and...
February 5th 09 03:24 PM
by OG Go to last post
0 850
Solving the mystery of Jupiter Great Red Spot by dan@@pixelphase.com
Hi, Jupiter jet streams and the great red spot were puzzling scientist for long time. Those phenomena are driven by a stellar cycle on Jupiter. Like the solar...
February 4th 09 12:25 PM
by dan@@pixelphase.com Go to last post
0 925
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