Category Archives: Equipment

The Making of a Satellite : Inside ISRO

The human eye – a user guide for astronomers

Dark side of the moon passing over Earth: Captured by NASA’s EPIC camera

NASA’s Orion Soars on First Flight Test- Watch the lift off.

NASA’s Orion spacecraft launched successfully atop a United Launch Alliance Delta IV Heavy rocket Dec. 5 at 7:05 a.m. EST from Space Launch Complex 37 at Cape Canaveral Air Force Station in Florida. Orion’s Exploration Flight Test-1 (EFT-1), is the first flight test for NASA’s new deep space capsule and is a critical step on NASA’s journey to Mars. The 4.5 hour flight is scheduled to conclude with the splashdown of Orion in the Pacific Ocean.

Star Walk 2 & Star Walk Kids – Tutorial

Star Walk 2 and Star Walk Kids are two apps that we know you’re going to love. In this tutorial video, David will demo both Apps and show off their in app purchase features. It’s a fantastic app that inspires creativity by allowing you (and your kids) to explore the universe like never before. If you only buy one Astronomy App, check out Star Walk 2.

Telescope Basics: Understanding telescope finders, types, and alignment

New telescopes come with a couple different types of inexpensive finders – magnifying and non-magnifying ones. In this video, David Fuller of “Eyes on the Sky” takes the viewer through the various types of basic finders, highlighting the benefits and drawbacks of each so the viewer can make a better educated decision when purchasing a new telescope. Also covered is how to align a finderscope with the main telescope, with a visual demonstration of how it might look for the viewer.

Telescope Basics: Learn the basics about barlow lenses for telescopes

Barlow lenses are an inexpensive – and often effective – way to increase the magnification and eyepiece collection of amateur astronomers. In this video, David Fuller of “Eyes on the Sky” takes the viewer through the various types, caveats and benefits with using them, as well as what to look for when shopping for one.

Telescope Basics: Understanding telescope and apparent field of view in telescopes

This video about the basics of telescopes discusses field of view, in particular, the difference between apparent field of view (AFOV) and telescopic field of view (TFOV). With an explanation of the math used to calculate these plus various examples of the calculations and visuals, the viewer can finish this video with a more complete understanding of this concept that is often confusing to beginning amateur astronomers who are new to telescopes.

Telescope Basics: Understanding the most common eyepiece sizes and types for telescopes

Hosted by David Fuller of “Eyes on the Sky,” this video goes over the various sizes and types of basic eyepieces for many amateur telescopes. The three most common eyepiece barrel diameters are discussed, as well as the types of lens configurations which determine how well the eyepiece forms an image for the user – including the concept of eye relief which can matter a lot to those who wear eyeglasses. Discussed are Huygens, Ramsden, Kellner, RKE, Modified Achromat, Plossl and some advanced designs, plus some information about anti-reflection coatings. An excellent primer for anyone wanting to understand more about telescope eyepieces.

Telescope Basics: Learn to calculate magnification for a telescope/understand focal ratios

Hosted by David Fuller of “Eyes on the Sky,” this video discusses the basics of telescope magnification and focal ratio. Each concept is covered, guiding the viewer through how to calculate magnification of a telescope and eyepiece combination, and how to determine the focal ratio of a given telescope. An excellent primer for anyone wanting to understand more about telescopes.

Telescope Basics: The Three Types of Telescopes Explained by David Fuller

The Human Eye – A user guide for Astronomers presented by Robert J Dalby

How to Choose a Binocular – Orion Telescopes and Binoculars

In this video, Ken from Orion gives you some great advice on what to consider when purchasing a pair of Binoculars. He covers different factors like aperture, magnification, field of view, lens coatings, size and more so you can pick the pair that is best for your needs and budget.