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The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States.
Optical Hipparchus - created the first known star catalogue with more than 850 stars. The data was incorporated into the Almagest along with the first list of stellar magnitudes and was the primary astronomical reference until modern times, 190-120 BC.
The Dark Energy Survey (DES) is an astronomical survey designed to constrain the properties of dark energy.It uses images taken in the near-ultraviolet, visible, and near-infrared to measure the expansion of the universe using Type Ia supernovae, baryon acoustic oscillations, the number of galaxy clusters, and weak gravitational lensing. [1]
Light curve of NGC 2525 after a supernova. Time-domain astronomy is the study of how astronomical objects change with time. Said to have begun with Galileo's Letters on Sunspots, the field has now naturally expanded to encompass variable objects beyond the Solar System.
RAVE (RAdial Velocity Experiment) is a multi-fiber spectroscopic astronomical survey of stars in the Milky Way using the 1.2-metre UK Schmidt Telescope of the Australian Astronomical Observatory (AAO).
Stellar streams in the Milky Way, discovered in 2007. This is a list of stellar streams.A stellar stream is an association of stars orbiting a galaxy.It was once a globular cluster or dwarf galaxy that has now been torn apart and stretched out along its orbit by tidal forces. [1]
In 1957, German astronomer Wilhelm Gliese published his first star catalogue of 915 known stars within 20 parsecs (65 ly) of Earth, listing their known properties and ordered geographically by right ascension. [1]
A simple chart for classifying the main star types using Harvard classification. In astronomy, stellar classification is the classification of stars based on their spectral characteristics.