Jason Shilling Kendall

Introductory Astronomy Videos

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Module 5: Telescopes: the Tools of Astronomy

Supplements and Credits

Supplement the videos with "OpenStax Astronomy"

01: Telescopes: Refraction and Reflection

All telescopes rely on some ability to focus light to a point. The two ways are refraction and reflection. Here we describe what they are in the context of telescopes.

02: Telescopes, part 2: Angular Resolution and Seeing

A key aspect of telescopes is their angular resolution. Here we discuss what makes up the concept of angular resolution and seeing.

03: Telescopes: Plate Scale, Focal Ratio and Magnification

Now we can see the last bits of basic telescopes, with focal ratio, magnificantion, plate scale and so on.

04: Extremely Basic Concepts about CCDs

Herein we chat about the nature of how images are created digitally. We look at it from a hardware point of view, and we see that the current way of deoing images relies on tiny boxes.

05: Big Telescopes and High Resolution

Herein we take a look at big telescopes around the world and in space. This is meant as a basic introduction to some of the greatest resources ever constructed. I'm showing off their websites and what the instruments look like.

06: Radio Telescopes

Herein, we learn about radio telescopes, what they do, what their function is, and some of the major radio facilities around the world. We also examine angular resolution and the need for interferometry in radio telescopes.

07: Space-Based Telescopes

Herein we learn about some of the more prominent space-based observatories, what they see, and how they do what they do.

08: All Sky Astronomical Surveys

Herein we learn about the nature of full-sky surveys. It is highly instructive to make maps of the entire sky, just like it's important to make maps of our spherical Earth. We look at many wavelength bands and how the sky looks at all those wavelengths.