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Venus




At first glance, if Earth had a twin, it would be Venus. The two planets are similar in size, mass, composition, and distance from the Sun. But there the similarities end. Venus has no ocean. Venus is covered by thick, rapidly spinning clouds that trap surface heat, creating a greenhouse-like world. Because Venus reflects so much sunlight, it is usually the brightest planet in the sky. The atmosphere consists mainly of carbon dioxide, droplets of sulfuric acid, and virtually no water vapor. In addition, the thick atmosphere allows the Sun's heat in but does not allow it to escape, resulting in surface temperatures over 450 °C. The high density of the atmosphere results in a surface pressure 90 times that of Earth. In the upper layers, the clouds move faster than hurricane- force winds on Earth. Venus rotates on its axis once every 243 Earth days, while it orbits the Sun every 225 days - its day is longer than its year! Besides that, Venus rotates retrograde. The spinning in the opposite directon of its orbit around the Sun.



Phases of Venus

Since Venus is an inferior planet, it shows phases when viewed with a telescope. The apperent diameter of Venus changes during it's orbit from approximately 10" during superior conjuction, 25" during elongation to 60" during inferior conjuction (invisible).

All the Venus images are resized to the same scale in order to show the change in diameter during it's orbit.


Venus approaching Jupiter, June 2015.

Images made with an 85mm lens and a Canon 600D camera, images are cropped and with Jupiter fixed.

Click on the image to go to the related page.

August 1, 2012 @ 04:45 UT
Picture made with a 12" Newton Telescope and a QHY5V camera + Astronomik red filter. The effective focal length used was 9300mm, N=31.0 (5x Televue PowerMate).
Magnitude : -4.4 45 sec AVI made with QGVideo32 (QHY)
Distance : 0.5968 AU 10ms exposure @ 75fps, Gain : 0%
Diameter : 28.2" The 500 best images are stacked
Altitude Venus : +35°02'Altitude Sun : +05°13'
CM Venus : 290.20°Phase Venus : 41.7%


July 17, 2004 @ 08:54 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -2.5 60 sec AVI made with K3CCDTools
Distance : 0.4666 AU 1/100 sec exposure @ 15fps
Diameter : 36.1" Gain : 10%, Brightness : 50%
Altitude : +49°03' Gamma : 0%, Saturation : 0%
CM : 330.68° ; Phase : 29.0% The 100 best images are stacked


The Venus transit of June 8th 2004.

Click on the image for moe images and information.


The changing appearence of Venus during spring 2004.

Click on the image for an enlargement.


May 21, 2004 @ 18:07 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -0.5 120 sec AVI maThe with K3CCDTools
Distance : 0.3340 AU 1/25 sec exposure @ 5fps
Diameter : 50.4" Gain : 10%, Brightness : 50%
Altitude : +50°13' Gamma : 0%, Saturation : 0%
CM : 43.25° ; Phase : 9.7% The 300 best images are stacked


May 14, 2004 @ 18:59 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -1.4 120 sec AVI maThe with K3CCDTools
Distance : 0.3713 AU 1/33 sec exposure @ 5fps
Diameter : 45.3" Gain : 0%, Brightness : 50%
Altitude : +47°11' Gamma : 0%, Saturation : 50%
CM : 53.47° ; Phase : 16.4% The 300 best images are stacked


May 5, 2004 @ 17:56 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -2.2 120 sec AVI maThe with K3CCDTools
Distance : 0.4289 AU 1/100 sec exposure @ 5fps
Diameter : 39.2" Gain : 10%, Brightness : 50%
Altitude : +33°38' Gamm : 0%, Saturation : 50%
CM : 69.21° ; Phase : 24.7% The 300 best images are stacked


April 16, 2004 @ 19:08 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -3.1 120 sec AVI maThe with K3CCDTools
Distance : 0.5687 AU 1/50 sec exposure @ 5fps
Diameter : 29.6" Gain : 15%, Brightness : 50%
Altitude : +33°8' Gamma : 0%, Saturation : 50%
CM : 109.23° ; Phase : 39.8% The 300 best images are stacked


April 7, 2004 @ 18:57 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -3.3 90 sec AVI maThe with K3CCDTools
Distance : 0.6382 AU 1/100 sec exposure @ 5fps
Diameter : 26.4" Gain : 5%, Brightness : 50%
Altitude : +26°20' Gamma : 50%, Saturation : 50%
CM : 130.20° ; Phase : 45.7% The 100 best images are stacked


March 28, 2004 @ 18:56 UT
Picture made with a 6" Newton Telescope and a Philips ToUcam 740K + Baader IRB filter. The effective focal length used was 3600mm, N=24.0 (eyepiece projection with a 17mm ploössl).
Magnitude : -3.5 30 sec AVI maThe with K3CCDTools
Distance : 0.7162 AU 1/100 sec exposure @ 15fps
Diameter : 23.5" Gain : 10%, Brightnes : 50%
Altitude : +32°40' Gamma : 50%, Saturation : 50%
CM : 154.62° ; Phase : 51.6% The 10 best images are stacked
© Copyright Rob Kantelberg
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