Observing the Venus Transit

So, for most of us the window for observing the transit of Venus has passed.  I began by watching the live stream on CosmoQuest with Phil Plait, Fraser Cain, Pamela Gay & co.  Watching Venus enter the Sun's disk was pretty exciting.  Thankfully it wasn't long before the clouds above my sky broke, and I made a dash for my binoculars.  Bonus - in addition to satisfying my personal desire to see the transit first hand, I was able to share it with my wife, daughter and a friend who had never even considered the thought of observing the sun, especially not with binoculars!  The projection through my binoculars was quite successful.  I don't have a proper mount for my tripod, so I had to hold the glass steady.  The fact that my house faces west meant I was able to project right on to my white siding - perfect!

Pictured here on the left is myself trying to hold the binos steady (not easy). To the right is the resulting projection.  Not bad!  You can easily see Venus on the lower right of the Sun's image.  The shadows along the northern part of the sun are from the local clouds.

Below is a close up of the projected image. I increased the contrast for easier viewing.  Very cool!

If you didn't have an opportunity to see this event for yourself, I'm sure the internet will be full of recorded streams and images for your viewing pleasure.  I believe you can find CosmoQuest recordings here, and NASA data here.

Transit of Venus

Hey! Be sure to mark your calendar for June 5th and 6th to see the historic transit of Venus.  This will be the last one of your lifetime, as the next transit will be in December 2117.  You can check your local transit times here.

The transit of Venus occurs when Venus passes through the same orbital plane as Earth, thus enabling us to see it cross in front of the Sun (rather than above or below it).  This is the same concept as the Moon eclipsing the Sun.  This alignment occurs only every 243 years, with pairs of transits occuring 8 years apart (2004 was the last one) seperated by 121.5 and 105.5 year gaps.

Observing The Transit
First of all, never look direcly at the sun without proper eye protection.  There are a few different ways you can go about observing the sun.  The simplest and least expensive method would be some sort of projection.  I won't go into all the details, but you can make a pinhole projector or project through a lens.  You can use this technique if you have binoculars.  (Never look at the sun through binoculars unless you have approved solar filters attached to the binoculars.)  Hold the binoculars steadily pointed at the sun and a sheet of paper some distance away from the eyepiece on which to focus the sun's disc. This method is best if you have a way to secure the binoculars in position so the image is not constantly moving in and out of focus from your moving arms - trust me. It's also a great way to share the view with others.  Me personally,  I'll be projecting through binoculars.  You can read more about these methods at spaceweather.com

Enjoy the event, and clear skies to you!