Welcome to the Home Page of

Udo Backhaus

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Address:

University of Duisburg-Essen
Prof. i.R. Dr. Udo Backhaus
Fachbereich Physik
Arbeitsgruppe Didaktik der Physik
45117 Essen
Germany
E-mail:
Phone: ++49 (0)201 183 2459 oder 2464,

Research Interests:

• Physics education
• Experimental physics
• Dynamical systems
• Astronomy

Things I am currently involved in:

• Astronomical phenomena
• Astrometry, especially
• Orbit determination of the maior planets by simple means,
• Determination of the sun's parallax,
• Measurements of trigonometric parallaxes of stars, for instance of Barnard's star and 61 Cyg  

  

  (click on the picture to get a larger demonstration of parallactic and proper motion!)   

• Internet project Simultaneously Photographing of the Moon and Determining its Distance
• Astronomy On-Line: Measuring the Distance to the Sun
• Astronomy On-Line: Measuring the Distance to the Sun - Final Report
• Experiments for physics teachers
• Astronomical Laboratory Exercises
• Photographing the moon and measuring its distance
• Roemer's method of determining the speed of light
• Observing, Photographing and Evaluating the Transit of Venus 2004

  
  The trace of Venus across the sun as photographed with horizontally mounted camera (left) and with parallactic mounted camera (right)

• Theory of Relativity:
• The appearance of fast moving objects

• International Year of Astronomy 2009
• The horizontal Position of the Sun and the Shape of the Earth

  
  Simultaneously measuring the sun's position above the horizon in Essen (Germany) and Isfahan (Iran)

• The Distance to the Moon

  
  The parallactic shift of the moon between (Germany) and Craiowa (Romania)

• The transit of Venus 2012


The parallax of Venus as simultaneously observed from Arnsberg (Germany) and Canberra (Australia)
and the correspondig baseline

• The transit of Mercury 2016

  
  The trace of Mercury across the sun, photographed with horizontally (left) and parallactically mounted camera

• The transit of Mercury 2019


The parallax of Mercury, made visible by project partners in Bamberg(Germany) and Rosario (Argentina)

• Astronomie und Internet im Ruhrgebiet
  

  

Publications:

  Editor: Udo Backhaus   last update: 2022-07-19