Personal data:

• Building of my first telescope (not very excellent), 1961.
• University of Copenhagen, study in physics, astronomy and history.
• College of education.
• Teacher from 1976 to 1990.
• Exhibitions in Denmark, Sweden and Czech Republic about the history of astronomy.
• Collaborator in the start of Tycho Brahe Planetarium.
• Collaborator at The Ole Rømer Museum.
• Observator at the Round Tower Observatory.
• Conductor of the tours for schools and groups at Round Tower Observatory.
• Conductor of the astronomical-historical collection at Round Tower Observatory.

Interests:

• General astronomy, science and history.
• The life and time of Tycho Brahe and Ole Rømer, the development of astronomical instruments.

Publications in Danish:

• Lyshastigheden og Rømer(The velocity of light and Rømer.), Meddelelser fra Ole Rømers Venner 1/1993, Fys/Kemi 5/1994 and KVANT (earlier Fysisk Tidsskrift) dec. 95.
• Tidlig dansk termometri (Early Danish thermometry.), KVANT (earlier Fysisk Tidsskrift) september 93.
• Rømer og refraktionen (Rømer and the refraction.), Astronomisk Tidsskrift 1/1994, KVANT (earlier Fysisk Tidsskrift) oktober 97, Meddelelser fra Ole Rømers Venner 1/1997.
• Hvor var Rømers hus(instrument)? (Where were the house(instrument) of Rømer),.
  
• Afstanden til stjernerne (The distance to the stars.), Fys/Kemi 1/95.
• Mål og vægt (The Danish reform of units in 1683.), Fys/Kemi 1/95.
• Afstandene i solsystemet (The distance to the Sun and planets.), Fys/Kemi 1/95.
• Kalenderreformerne år 1700 og 1743 (The reform of the Danish calender in 1700 and 1743.), Historisk Tidsskrift 1996/2.
• Kalendermekanik (The mechanics of the calender.), Universitetsalmanakken 1998.
• Rømers termometre( The thermometers of Rømer), Meddelelser fra Ole Rømers Venner 1/1998.
• Grademål (Thermometry), SKALK 6/1999.
• Naturvidenskabeligt funderede undergangsteorier (Scientific doomsday theories), Religionslæreren 6/1999.
• Observatorier i København (Observatories in Copenhagen), aktuel ASTRONOMI 1/2000.
• Fra Hven til rummet (From Ven to the Spaceage), KVANT 2/2002.
• Flydevægten - Rømers hydrostatiske målinger (The araeometer, hydrostatic mesurements by Ole Rømer), KVANT 3/2003
• "Tidlig termometri" (Early thermometry) in the book "Ole Rømer - videnskabsmand og samfundstjener", Gads Forlag 2004
• The Hydrometer:Rømer's Hydrostatic Mesurements, Sientific Instrument Society Bulletin No. 84, March 2005. (english)
• The instruments of Tycho Brahe, News from The Nationalmuseum nr. 112, sep. - nov. 2006
• Biography of Ole Rømer, The Abraham Zelmanov Journal — Vol. 1, 2008, online.