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Posts Tagged ‘telescopes’

Saturday Lecture Series: Astronomical HD

by coldwarrior ( 34 Comments › )
Filed under Academia, Astronomy, Open thread, Science at August 24th, 2013 - 8:00 am

Good morning all! Today’s lecture is on adaptive optics, dry air, and large mirrors. University of Arizona, long time pioneers in astronomical optics, have raised the bar and have made a ground based telescope that has twice the resolution of the venerable Hubble Space Telescope. Our Grad Ass CJ thinks this is just groovy.

 

The below link takes you to an article with plenty of fantastic photos and links so you can learn all about adaptive optics. Have a great Saturday!

Astronomers at the University of Arizona, the Arcetri Observatory near Florence, Italy and the Carnegie Observatory have developed a new type of camera that allows scientists to take sharper images of the night sky than ever before. The team has been developing this technology for more than 20 years at observatories in Arizona, most recently at the Large Binocular Telescope, or LBT, and has now deployed the latest version of these cameras in the high desert of Chile at the Magellan 6.5-meter telescope.

“It was very exciting to see this new camera make the night sky look sharper than has ever before been possible,” said UA astronomy professor Laird Close, the project’s principal scientist. “We can, for the first time, make long-exposure images that resolve objects just 0.02 arcseconds across – the equivalent of a dime viewed from more than a hundred miles away. At that resolution, you could see a baseball diamond on the moon.”

 

Saturday Lecture Series: Let’s Build a Dobsonian!

by coldwarrior ( 63 Comments › )
Filed under Open thread, saturday lecture series at October 23rd, 2010 - 8:30 am

Today, we are going to use the Saturday lecture series to introduce some telescope design and astronomy into the series. Entrance into amateur astronomy can be as inexpensive as a pair of binoculars or as expensive as tens of thousands of dollars. It is a very relaxing and educational hobby.

Here is an excellent article on purchasing your first scope.

Here is an article about optics in telescopes.

This is the company i use to purchase any and all astronomy related items (i am not affiliated with them in any way).

The best bang for the buck in home astronomy is a Newtonian design mounted on a Dobsonian mount:

Here are the pictures of my 16″ Newtonian on the home made Dobsonian mount.The mirror is very thick and very heavy. so is the tube assembly. All movement points are teflon and the entire structure is on casters. It can move in both right ascension and declination axis.