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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 ...
See List of extinct countries, empires, etc. and Former countries in Europe after 1815 for articles about countries that are no longer in existence. See List of countries for other articles and lists on countries. Wikimedia Commons includes the Wikimedia Atlas of the World. Entries available in the atlas. General pages
English: Gaia, ESA’s billion-star surveyor, is detecting stars and measuring their properties in order to build up the most precise 3D map of the Milky Way. By accurately measuring the motion of each star, astronomers will be able to peer back in time to understand the Milky Way’s history, its evolution and its destiny.
The mission will test technologies needed for the Evolved Laser Interferometer Space Antenna (eLISA), an ESA gravitational wave observatory planned to be launched in 2034. The scientific phase started on 8 March 2016 and will last 6 months. [50] Gaia (spacecraft) Gaia is a space observatory of the European Space Agency (ESA) designed for ...
The limits of observation as visualized by the Milky Way's star density map. Source: Gaia spacecraft's 2021 data release. Many projects have attempted to bridge the gap in knowledge caused by the Zone of Avoidance. The dust and gas in the Milky Way cause extinction at optical wavelengths, and foreground stars can be confused with background ...
Government space agencies, established by governments of countries and regional agencies (groupings of countries) are established as a means for advocating for engaging in activities related to outer space, exploitation of space systems, and/or space exploration. The listings summarize all countries' and regional authorities' space agencies ...
English: An all-sky view of stars in the Milky Way and neighbouring galaxies, based on the first year of observations from ESA’s Gaia satellite, from July 2014 to September 2015. This map shows the density of stars observed by Gaia in each portion of the sky.