czas-i-pomiary: Gaia (spacecraft)

Evidence: 100 • authority: 72

Gaia is a retired space observatory of the European Space Agency (ESA) that was launched in 2013 and operated until March 2025. The spacecraft was designed for astrometry: measuring the positions, distances and motions of stars with unprecedented precision, and the positions of exoplanets by measuring attributes about the stars they orbit such as their apparent magnitude and colour. As of 2026, the mission data processing continues, aiming to construct the largest and most precise 3D space catalogue ever made, totalling approximately 1 billion astronomical objects, mainly stars, but also planets, comets, asteroids and quasars, among others. To study the precise position and motion of its ta…

Evidence: 45 • authority: 88

Gaia: Science with 1 billion objects in three dimensions. Gaia is an operational satellite in the ESA science programme. It is gathering data for more than a billion objects. Gaia measures positions and motions of stars in our Milky Way Galaxy, but captures many asteroids and extragalactic sources as well. The first data release has already been made and exploitation by the world-wide scientific community is underway. Further data releases will be made with further increasing accuracy. Gaia is well underway to provide its promised set of fundamental astronomical data.

Evidence: 36 • authority: 72

Hellenic Space Dawn (HSD) is a Greek space mission aiming to demonstrate communication technologies and on-board data processing for Earth observation applications. The mission consist of two 8U CubeSat-type small satellites (Helios and Selene) equipped with laser communication terminals. HSD was launched on 3 May 2026.

Evidence: 25 • authority: 92

Exploring central star variability of planetary nebulae using gaia photometry.. This study presents an analysis of the variability of 81 central stars of planetary nebulae (CSPNe) are identified as variable in Gaia Data Release 3 (DR3). By combining Gaia time-series photometry with data from the Optical Gravitational Lensing Experiment (OGLE), the Transiting Exoplanet Survey Satellite (TESS), and the Kepler, we characterise their variability and identifed 17 new periodic systems. Among these, 13 are short-period variable: light-curve modelling reveals one eclipsing binary, two systems with combined eclipsing and ellipsoidal modulation, one with irradiation effect, two with irradiation/ellip…

Evidence: — • authority: 80

The Gaia Catalogue Second Data Release and its Implications to Optical Observations of Man-made Earth Orbiting Objects

Evidence: — • authority: 72

The Milky Way or Milky Way Galaxy, or simply the Galaxy, is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galaxy, which are so far away that they cannot be individually distinguished by the naked eye. The Milky Way is a barred spiral galaxy with a D25 isophotal diameter estimated at 26.8 ± 1.1 kiloparsecs (87,400 ± 3,600 light-years), but only about 1,000 light-years thick at the spiral arms (more at the bar). Recent simulations suggest that a dark matter area, also containing some visible stars, may extend up to a diameter of almost 2 million light-yea…

Evidence: — • authority: 72

Celestia is a real-time 3D astronomy software program that was created in 2001 by Chris Laurel. The program allows users to virtually travel through the universe and explore celestial objects that have been catalogued. Celestia also doubles as a planetarium, but the user is not restricted to the Earth's surface, like in other planetarium software such as Stellarium. Celestia can display objects of various scales using OpenGL. Celestia is available for AmigaOS 4, Linux, macOS, Microsoft Windows, Xbox, iOS, VisionOS, and Android. Celestia is also available on FreeBSD as both a binary package and a port. It is free and open source software released under the GNU General Public License. Celesti…

Evidence: — • authority: 72

SpaceEngine is an interactive 3D planetarium and astronomy software initially developed by Russian astronomer and programmer Vladimir Romanyuk and released in June 2010. Romanyuk and the SpaceEngine team later founded the American game studio Cosmographic Software in Connecticut in February 2022 to continue development. SpaceEngine creates a 1:1 scale three-dimensional planetarium representing the entire observable universe, combining real astronomical data with scientifically accurate procedural generation algorithms. Users can travel through space in any direction or at any speed and can move forwards or backwards in time. SpaceEngine is currently in beta status. Up to version 0.9.8.0E, r…

Evidence: — • authority: 72

The Gaia hypothesis (), also known as the Gaia theory, Gaia paradigm, or the Gaia principle, proposes that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating complex system that helps to maintain and perpetuate the conditions for life on the planet. The Gaia hypothesis was formulated by the chemist James Lovelock and co-developed by the microbiologist Lynn Margulis in the 1970s. Following the suggestion by his neighbour, novelist William Golding, Lovelock named the hypothesis after Gaia, the primordial deity who was sometimes personified as the Earth in Greek mythology. In 2006, the Geological Society of London awarded Lovelock the…

Evidence: — • authority: 72

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. Data from every data release can be accessed at the Gaia archive.

Evidence: — • authority: 80

Scheduling of operations in big data processing center for Gaia mission

Evidence: — • authority: 80

Operational qualification of scientific pipeline in big data processing center for Gaia mission