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Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education from pre-school to university, including professional training and informal learning. We invite teachers, students, and researchers to join us in creating open educational resources and collaborative learning communities. To learn more about Wikiversity, try a guided tour, learn about adding content, or start editing now.

Today's Featured Project
In the observational astronomy project, astronomers can gain an understanding of objects in the universe by studying them with a telescope. Observational astronomy is the process of collecting and analyzing data to learn about these objects. In this learning project a computer program is used to view and study images taken with a telescope to learn basic concepts in astronomy. This is part of the astronomy project.

The Telescope
1. Objective lens


2. Eyepiece
3. Eye
4. Object (at a large distance)

5. Real image of the object at the focal plane of the objective lens - a film could be placed here for photographing the object


6. Virtual image of the object (as it appears to the eye)
7. Tube

Diagram of a Keplerian or astronomical telescope. Click on the image for a full size version which you can freely re-use and modify. Print it and use it for your lessons, integrate it into your pages on Wikiversity, or use it in other learning resources and websites. Use the links below to find more images like this one.

Images of telescopes - Images of lenses
Mechanics images - Electromagnetism images - Optics images - Atomic physics images
Images relating to physics in general


This image is a part of the
Educational Media Awareness Campaign, raising awareness among educators about the availability and usage of millions of free internet media in education.
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