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  2. Gaia (spacecraft) - Wikipedia

    en.wikipedia.org/wiki/Gaia_(spacecraft)

    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]

  3. Gaia Sky - Wikipedia

    en.wikipedia.org/wiki/Gaia_Sky

    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).

  4. Zone of Avoidance - Wikipedia

    en.wikipedia.org/wiki/Zone_of_Avoidance

    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 ...

  5. Gaia catalogues - Wikipedia

    en.wikipedia.org/wiki/Gaia_catalogues

    The Gaia catalogues are star catalogues created using the results obtained by Gaia space telescope. The catalogues are released in stages that will contain increasing amounts of information; the early releases also miss some stars, especially fainter stars located in dense star fields. [1] Data from every data release can be accessed at the ...

  6. Milky Way - Wikipedia

    en.wikipedia.org/wiki/Milky_Way

    Map of stars cataloged by the Gaia release in 2021, displayed as density mesh in the diagram. The ESA spacecraft Gaia provides distance estimates by determining the parallax of a billion stars and is mapping the Milky Way with four planned releases of maps in 2016, 2018, 2021 and 2024. [97] [98] Data from Gaia has

  7. Astrometry - Wikipedia

    en.wikipedia.org/wiki/Astrometry

    In 2013, the Gaia satellite was launched and improved the accuracy of Hipparcos. [12] The precision was improved by a factor of 100 and enabled the mapping of a billion stars. [ 13 ] Today, the catalogue most often used is USNO-B1.0 , an all-sky catalogue that tracks proper motions, positions, magnitudes and other characteristics for over one ...

  8. HEALPix - Wikipedia

    en.wikipedia.org/wiki/HEALPix

    The pixelisation related to the H=4, K=3 projection has become widely used in cosmology for storing and manipulating maps of the cosmic microwave background. Gaia mission uses HEALPix as the basis for source identification. [9] An alternative hierarchical grid is the Hierarchical Triangular Mesh (HTM).

  9. List of European Space Agency programmes and missions

    en.wikipedia.org/wiki/List_of_European_Space...

    A staple of the ESA's Science Doctrine is the Cosmic Vision programme, a series of space science missions chosen by the ESA to launch through competitions, similar to NASA's Discovery and New Frontiers programmes. It succeeds the Horizon 2000 and Horizon 2000+ programmes which launched notable missions such as Huygens, Rosetta and Gaia.