05 June 2012, 06:10 PM ET
The transit has officially begun and will last for six hours and 40 minutes.
05 June 2012, 11:20 AM ET
Venus' stripes, its quick-moving atmosphere and its vanished oceans are just some of its mysteries.
05 June 2012, 07:00 AM ET
A breakdown of the nearly seven-hour event's major milestones.
05 June 2012, 06:45 AM ET
If you miss the June 2012 transit of Venus across the sun, you won't have another opportunity until the year 2117.
05 June 2012, 05:14 AM ET
The transit of Venus across the sun on June 5, 2012. See sky maps and more .
04 June 2012, 09:01 AM ET
Earth's Sister Planet
04 June 2012, 07:01 AM ET
Venus is an oddity in many ways, including its super-fast winds, scorching temperatures and extreme pressure.
04 June 2012, 07:00 AM ET
An interesting view of Earth would be visible from Venus during the transit.
04 June 2012, 12:00 AM ET
From having a day longer than its year to its wind speeds faster than tornadoes, Venus is odd.
03 June 2012, 07:00 AM ET
The rare sight of Venus transiting the sun is coming up on Tuesday (June 5).
03 June 2012, 07:00 AM ET
Astronomers around the world will take advantage of the historic event.
01 June 2012, 12:00 AM ET
See tips on how to see the June 5 Venus transit of the sun in 2012, the one until 2117, in this SPACE.com infographic.
29 May 2012, 01:47 PM ET
The upcoming Venus transit should offer scientists a rare chance to observe the atmosphere of Venus.
29 May 2012, 01:05 PM ET
See images of the Transit of Venus across the sun as witnessed by people throughout history.
29 May 2012, 06:00 AM ET
Asteroid and comet impacts could have raised Mars' temperature enough to support liquid water.
21 May 2012, 07:00 AM ET
Venus will trek across the sun's face on June 5, marking the last such transit until 2117.
16 May 2012, 01:01 PM ET
Watching Venus trek across the sun's face could help planet hunters hone their techniques.
10 May 2012, 04:00 PM ET
Avid astrophotographer Ajay Talwar snapped a stunning photo series of the moon and Venus over Delhi, India.
07 May 2012, 03:24 PM ET
After the June 5/6 event, the next trek of Venus across the sun's face comes in 2117.
04 May 2012, 03:04 PM ET
The goal is to gauge the composition of Venus' atmosphere.
01 May 2012, 02:32 PM ET
Highlights of the month include the Eta Aquarid meteor shower, which peaks on May 6th and an annular solar eclipse that will be seen in the western United States. Venus, Saturn and Mars are part of the planetary spectacle in the night sky.
30 April 2012, 06:00 AM ET
Skywatcher and photographer Stefano De Rosa snapped this view of his three children enjoying the night sky.
27 April 2012, 01:40 PM ET
Venus reaches maximum brightness this week, making it a must-see for skywatchers.
27 April 2012, 09:23 AM ET
The president took some time to gaze skyward this week at Colorado's Buckley Air Force Base.
25 April 2012, 11:27 AM ET
See these amazing skywatching photos of Venus and the crescent moon in April 2012.
09 April 2012, 05:00 PM ET
Astrophotographer captures beautiful image of the moon and Venus in conjunction over Gobustan National Park in Azerbaijan.
06 April 2012, 01:19 PM ET
Venus and Jupiter appeared to come closer this year and then passed each other on March 13.
05 April 2012, 02:01 PM ET
Northern and Southern Lights may occur on Venus, too.
04 April 2012, 12:00 PM ET
Jupiter, the moon and Venus align over a shining castle in skywatcher’s photo.
02 April 2012, 07:00 AM ET
It's the last chance to see a Venus transit until 2117.
24 March 2012, 07:00 AM ET
Skywatchers can experience this weekend's planetary conjunction with NASA and the Slooh Space Camera.
23 March 2012, 11:09 AM ET
Venus and Jupiter are beacons you can’t miss.
14 March 2012, 07:00 AM ET
After a long buildup, the two planets finally came together in the sky last night.
13 March 2012, 05:37 PM ET
Observers around the world have snapped stunning pictures of the two planets.
12 March 2012, 06:50 PM ET
Amazing skywatcher shots of Venus and Jupiter hanging together in the sky.
12 March 2012, 05:55 PM ET
The dazzling one-minute video was shot last week.