Dec

11

Dobsonian vs Newtonian telescopes

Filed Under DVDs, Telescopes | 4 Comments

Dobsonian and Newtonian telescopes are both reflector telescopes, utilizing a mirror and not lenses to see into space.

The term Newtonian refers to the actual telescope itself; whereas, the term Dobsonian refers to the telescope with its altazimuth mount.

An Altazimuth mount, also known as an alt-azimuth mount, is a very simple dual-axis telescope mount.

Dobsonian telescopes use a mechanically operated alt-azimuth mount, meaning that to move the telescope when navigating through space you literally push it and pull it up and down and left and right until you are pointing at what you want to see. The telescope moves smoothly due to the mount’s bearings and stays in place due to the mount’s friction and there are no parts to breakdown or wear out over time.

The only real disadvantage with a Dobsonian telescope is that it is tricky to track objects as they move through space, making it an impractical type of telescope to use for astrophotography.

Click Here for Dobsonian Telescopes at Amazon.com!

Click Here for Newtonian Telescopes at Amazon.com!

Oct

23

Me & Isaac Newton

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Presented by billionaire Paul Allen and featuring chemist Gertrude Elion, environmental physicist Ashok Gadgil, theoretical physicist Michio Kaku, computer scientist Maja Mataric, cognitive scientist Steven Pinker, professor of cancer medicine Karol Sikora and primatologist Patricia Wright, the 110-minute documentary, Me & Isaac Newton, humorously explores the life, accolades and accomplishments of seven leading scientists.

Particularly suited for high school students, Me & Isaac Newton discusses how the seven featured leading scientists became interested in science, and what remarkable experiences their education and profession have led to.

Click Here for Me & Isaac Newton at Amazon.com!

Sep

16

The Universe The Complete Season One History Channel

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Season One of The Universe on the History Channel is one of the most amazing pieces of television ever produced, with remarkable videos and photographs of the universe from the latest satellites, telescopes and imaging devices available.

Often asked questions about the universe are being answered, or are coming close to being answered, about black holes, the birth and death of stars, the collision of galaxies and so much more.

Click Here for The Universe at Amazon.com!