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Astrometri-2010_omslag.pdf

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   BitStore.Metadata_version:
   	1.0
  
   BitStore.Access:
   	public
  
   BitStore.Filename:
   	Astrometri-2010_omslag.pdf
  
   BitStore.Size:
   	396104
  
   BitStore.Format:
   	PDF
  
   BitStore.Ident:
   	30001262:3
  
   BitStore.Digest:
   	sha256:1857fafa004eda4e4904a760151fbd387e862e68b9ddd7cbbda4be01895c3424
  
   BitStore.Last_edit:
   	20191028 phk
  
   DDHF.Keyword:
   	EVENT/2010
   	EVENT/COVER
   	GIER/ASTRONOMY
   	ASTRONOMY
  
   Event.Title:
   	Hipparcos og Gaia
  
   Event.Subtitle:
   	To foredrag om satelitter med dansk og svensk indsats gennem 85 år.
  
   Event.Date:
   	20100506
  
   Event.Location:
   	Kroppedal Museum
  
   Presentation.Speaker:
   	Erik Høg
  
   Presentation.Title:
   	From an Experiment in 1925 to the Hipparcos and Gaia Space Missions
  
   Presentation.Bio:
   	Dr. scient, professor v. Niels Bohr Instituttet
  
   Presentation.Abstract:
   	A teenager, Bengt Strömgren, made an astrometric experiment
   	in 1925 which had wide- reaching consequences. The direct
   	connection from Strömgren's photoelectric recording of
   	stellar transits on the old meridian circle in Copenhagen
   	to the Hipparcos and Gaia space missions is presented in
   	the lecture. Peter Naur was astronomer and Høg was his
   	student and collaborator 1953-58 and very interested in
   	techniques.  Working in the Hamburg Observatory from 1958-73
   	Høg invented and developed a semi-automatic meridian circle
   	for an expedition to Perth in Western Australia and a GIER
   	computer went with it. With this experience he could make
   	a new design of an astrometric space mission in 1975 which
   	developed into the Hipparcos mission.
   	[Afholdes på dansk]
  
   Presentation.Speaker:
   	Lennart Lindegren
  
   Presentation.Title:
   	Gaia - solving non-linear equations with a billion unknowns
  
   Presentation.Bio:
   	Professor, Space astrometry group, Lund Univ.
  
   Presentation.Abstract:
   	The satellite Gaia is to be launched in September 2012, and
   	will after a few months take up its observing position at
   	the Lagrange point L2, 1.5 million km away from the Earth.
   	During five or six years it will continuously scan the whole
   	sky, registering the exact positions and motions of a billion
   	stars, and dispatch an enormous quantity of data back to
   	the Earth. The processing of this data, converting it to a
   	star catalogue eagerly awaited by astronomers around the
   	world, is by itself a great challenge, perhaps as large and
   	difficult as the making of the satellite. It is estimated
   	that the data analysis effort to produce the Gaia catalogue
   	is about one sextillion (10^21) floating point operations.
   	[Presented in English]