Creative Commons licence: CC-BY NC
All content on these pages (text, images, videos) may be used for non-commercial purposes.
Above all, I hope that the materials will be useful for teachers in schools and other educational settings.
If used, please cite the source fairly! – Please cite as follows:
Susanne M Hoffmann, urania-uhura.de Online Teaching Materials Collection, 2012

Size of the World

Size of the Earth

An ancient method allows you to measure the size of the globe during your school excursion.

Size of the Moon

  • Spherical Earth
  • Longitude
  • Lunar Eclipse

Size of the Solar System

  • Transit of Venus
  • Our Expeditions

Light

Light and Shadow

  • light beams
  • red/ blue sky
  • rainbows/ halos
  • colourful shadows
  • saint elmo’s fire
  • Solar Eclipse

Spectral Atlas (Colours of Stars)

  • star spectra
  • age of a cluster
  • ocular filter test

Cosmic Magnetic Fields 

  • Earth 
  • Aurorae
  • Sun

Gravity & Gravitation

Weightless

  • Space Suit
  • Woman in the Moon
  • Experimental Rockets
  • OrbitAll Berlin

Gravity

Gravitational Waves

Gravitational Lenses

  • Distraction of Light
  • Caustics
  • Quicky
  • Light Amplification

Modern Physics

Exoplanets

Black Holes

  • Explanation
  • Easy Calculation

Relativity

  • Universality 
  • Equivalence Principle
  • What is relative?

Basics

Coordinate Systems

… in astronomy

  • horizontal
  • equatorial

Error Experiments

  • Calculations
  • Data Types
  • Tests

Astro-Basics

  • Islamic Crescent
  • Zodiac
  • Simulated Sky
  • Our Planets

Astrophotography

Imprint:

This website was founded in 2001 as a collection of extracurricular materials for the Astronomical Summer Camp (ASL), hosted from 2004 to 2014 under the domain name exopla.net (which eventually became meaningless and used for different content now), and relaunched in 2012 as a collection of extracurricular teaching materials during Hoffmann’s professional role as a lecturer in physics and physics education. It was then hosted under the domain name “urania-uhura.de” (which existed since 2005, but was misused in spoofing attacks in 2012 and several times after 2017, so that we finally switched it off in 2025). All teaching materials presented have therefore been tested with school pupils and/or students up to university level.

The website is now operated by the FNJE Foundation for Extracurricular Youth Work and Adult Education, which was founded in 2015/6. ‘Stiftung FNJE’ stands for ‘Stiftung zur Förderung naturwissenschaftlicher Jugend- und Erwachsenenbildung’ (Foundation for the Promotion of Science Education for Young People and Adults). Since then, the content has been available here.