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Gaia is a space observatory of the European Space Agency (ESA) that was launched in 2013 and is planned to operate until March 2025. The spacecraft is designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, [5] [6] and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent magnitude and color. [7]
An all-sky view of stars in the Milky Way and neighbouring galaxies, based on the first year of observations by Gaia, from July 2014 to September 2015. Map shows the density of stars observed by Gaia in each portion of the sky. Brighter regions indicate denser concentrations of stars, while darker regions correspond to patches of the sky where ...
Gaia Sky is an open-source astronomy visualisation desktop and VR program with versions for Windows, Linux and macOS.It is created and developed by Toni Sagristà Sellés in the framework of ESA's Gaia mission to create a billion-star multi-dimensional map of our Milky Way Galaxy, in the Gaia group of the Astronomisches Rechen-Institut (ZAH, Universität Heidelberg).
The first launch to use the complex occurred on 21 October 2011, when a Soyuz ST-B launched the first two Galileo In Orbit Validation spacecraft. [2]The site's equatorial latitude allows a greater payload mass to be delivered into geosynchronous transfer orbit compared to existing Soyuz launch facilities at the Baikonur Cosmodrome in Kazakhstan.
Maximum payload mass (kg) Reusable / Expendable Orbital launches including failures [a] Suborbital test flights Launch site(s) Dates of flight LEO GTO Other First Latest Starship Block 1 [140] United States: SpaceX: 121 m 40,000 – 50,000 [141] N/A N/A Reusable: 0 6 Starbase: 2023 2024 Angara A5 / Orion Russia: Khrunichev: 54.9 m N/A 6,500 ...
Hipparcos ' follow-up mission, Gaia, was launched in 2013. The word "Hipparcos" is an acronym for HIgh Precision PARallax COllecting Satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes .
Gaia BH1 (Gaia DR3 4373465352415301632) is a binary system consisting of a G-type main-sequence star and a likely stellar-mass black hole, located about 1,560 light-years (478 pc) away from the Solar System in the constellation of Ophiuchus. [4]
ESA's Gaia mission also uses a Lissajous orbit at Sun–Earth L2. [10] In 2011, NASA transferred two of its THEMIS spacecraft from Earth orbit to Lunar orbit by way of Earth–Moon L1 and L2 Lissajous orbits. [11] In June 2018, Queqiao, the relay satellite for China's Chang'e 4 lunar lander mission, entered orbit around Earth-Moon L2. [12] [a]