Welcome to Astronomy & Telescope Astronomy



· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account

  Who's Online

There are currently, 11 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here




Select Interface Language:


  Random Headlines

[ Observer ]

·Astronomy: Observer - Sky-RECORDING THE SKY
·Astronomy: Observer - Site-CHOOSING A SITE
·Astronomy: Observer - GOOD SEEING
·Astronomy: Observer - CLEAR SKIES

  Venus: Astronomy: Venus - TRANSITS OF VENUS
Posted on Saturday, December 11 @ 01:39:05 CST by astronomy


Every 100 years or so, observers on Earth can watch Venus at inferior conjunction pass across the face of the Sun. These rare events are called transits of Venus, and they occur in a pair, 8 years apart. The jast two transits were in 1874 and 1882; the next two take place on 8 June 2004 and 6 June 2012. In 2004, Venus crosses the southern part of the Sun, and in 2012, the northern part.

In earlier times, transits of Venus let astronomers measure the distance from Earth to Venus, and, by extension, the scale of the Solar System. After the telescope was invented, a handful of astronomers made individual efforts for the 1639 transit. But for the 1761 and 1769 events, the British and French sent out expeditions all over the globe, among them the famous exploring voyage of James Cook, which went to Tahiti for the 1769 transit.

Better distances for the Solar System did , emerge from these efforts, but the most notable finding was about Venus itself. Observing the 1761 transit, the Russian scientist Mikhail Lomonosov discovered that Venus has an atmosphere. He noted the halo it produced around the black dot of the planet as it slipped onto the solar disk and off again.




Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

  Related Links

· More about Venus
· News by astronomy

Most read story about Venus:
Astronomy: Venus - GREENHOUSE EFFECT


  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Very Good



 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend


Associated Topics


"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.

No Comments Allowed for Anonymous, please register

  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt