Hipparcos (an acronym for "High precision parallax collecting satellite") was a scientific mission of the European Space Agency (ESA), launched in 1989 and operated between 1989 and 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permits the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial velocity measurements from spectroscopy, this fixes all six quantities needed to determine the motion of the star. The Hipparcos Catalogue, a high-precision catalogue of more than 100,000 stars, was published in 1997. The lower precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000.
By the second half of the 20th century, the accurate measurement of star positions from the ground was running into essentially insurmountable barriers to improvements in accuracy, especially for large-angle measurements and systematic terms. Problems were dominated by the effects of the Earth's atmosphere, but were compounded by complex optical terms, thermal and gravitational instrument flexures, and the absence of all-sky visibility. A proposal to make these exacting observations from space was first put forward in 1967.
From Hipparcos To Gaia
Cartographie de la Galaxie : Des Satellites Hipparcos à Gaia [HD]
Teach Astronomy - Hipparcos
Hipparcos 3D flyby
Charting the Galaxy - from Hipparcos to Gaia Pt. 1
Charting the Galaxy - from Hipparcos to Gaia Pt. 2
Hipparcos catalogue 4K
Un Mapa de Nuestra Galaxia: De Hipparcos a Gaia [HD]
Catalogo Hipparcos, progetto Goretti
Science@ESA: Episode 6: Charting the Galaxy - from Hipparcos to Gaia
Flying thru Hipparcos Tycho Catalog - Astronomy
Hipparcos and Tycho Star Data Flythrough
Kartieren Der Galaxie - Von Hipparcos zu Gaia [HD]
Hipparcos
From Hipparcos To Gaia
Cartographie de la Galaxie : Des Satellites Hipparcos à Gaia [HD]
Teach Astronomy - Hipparcos
Hipparcos 3D flyby
Charting the Galaxy - from Hipparcos to Gaia Pt. 1
Charting the Galaxy - from Hipparcos to Gaia Pt. 2
Hipparcos catalogue 4K
Un Mapa de Nuestra Galaxia: De Hipparcos a Gaia [HD]
Catalogo Hipparcos, progetto Goretti
Science@ESA: Episode 6: Charting the Galaxy - from Hipparcos to Gaia
Flying thru Hipparcos Tycho Catalog - Astronomy
Hipparcos and Tycho Star Data Flythrough
Kartieren Der Galaxie - Von Hipparcos zu Gaia [HD]
Hipparcos
The Hipparcos Mission
08/07/2012, Napoli , Premio Vi Cavalleggeri Aosta
Red Rover -- An Early Approach
22/08/2012, Grosseto , Premio Maremma Magazine
Denebzi 7000 light-years
Gaia Scanning the Sky [HD]
Space Travel To Orion
Charting The Milky Way Galaxy
100,000 Stars
Sound of Space - Hipparcos
#CNESTalks : Gaia, 1 milliard d'étoiles en 3D
[MIX] July 2014 Eroge Releases
CASS Seminar 24 April 2013: Carl Melis (UCSD)
Space Engine - Universe SandBox 1080p
Space Engine - Universe SandBox 1080p
Gaia (2)
「天の川の地図を描く」(2014.09.30)
26.03.2012 Color changing dancing star over Scotland, Dunoon ( Sirius )
[linux.conf.au 2014] Monitor and Control in the MWA
Sound of Space - Giotto
Sound of Space - COF
Science@ESA: Episode 11: Chasing comets
The Sun, our Local Star [HD]
Modeling Galaxy Formation and Chemical Evolution - Joel Primack
Видеоотчет. In Hip We Hope. 11.05.13
Andromeda Galaxy
Sound of Space - Marcopolo
El Sol nuestra Estrella Local por Rebecca Barnes (Agencia Espacial Europea)
Documental Radiotelescopios ALMA para fulldome de Mirage3D.eu
The Making of DARK UNIVERSE with Neil deGrasse Tyson
Let's Play Together: Warframe - Erde(4) Mission #44 [Deutsch] [HD] - Gaia
"Mapeando Nuestra Galaxia desde Hipparcos hasta Gaia" por Rebecca Barnes (Agencia Espacial Europea)
Gaia: Buildging on the Legacy of Hipparcos [HD]
Charting the Galaxy - from Hipparcos to Gaia
Charting the Galaxy: From Hipparcos to Gaia [HD]
ESA vodcast 'Charting the Galaxy - from Hipparcos to Gaia' part 1
ESA vodcast 'Charting the Galaxy - from Hipparcos to Gaia' part 2
Oltre l'Handicap - Buonanotte fra le stelle