Keywords
Tycho Brahe
Gaia
How to Cite
Abstract
What is common for Tycho Brahe, The Round Tower, and ESA's Gaia-satellite? The answer is astrometry - the accurate measurement of star positions. Erik Høg takes us on a fascinating tour through 400 years of Danish astrometry history, from Brahes naked eye observations to modern satellite based missions. The article tells how Denmark has contributed with innovations as astrometry with photo multipliers and development of the ground breaking Hipparcos- and Gaia-technology. For anyone with an interest in astronomy and measurement technology this is an eye opener which is not only looking back but also forward to the future challenges for astrometry.
References
[1] E. Høg (2010) "En landmåler i himlen", Kvant, bind 21, nr. 3, side 3-8. http://www.kvant.dk/upload/kv-2010-3/kv-2010-3-EH-astrometri.pdf
[2] E. Høg (2013) "Gaia-missionens snørklede tilblivelse", Kvant, bind 24, nr. 4, side 30-34. http://www.kvant.dk/upload/kv-2013-4/kv-2013-4-EH-Gaia.pdf
[3] E. Høg (2022) "Letter on Gaia". http://www.astro.ku.dk/~erik/xx/hoeg3-letter.pdf
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