Astronomy

thumb |upright=1.5 |The Paranal Observatory of [[European Southern Observatory creating a laser guide star in the atmosphere to observe the Galactic Center]]

thumb|upright=1.5|A voting session is conducted in 2006 International Astronomical Union's general assembly for determining a new definition of a planet

thumb|upright=1.05|A modern instrument for geodetic measurements using satellites

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photograph of planet Earth taken on 14 February 1990 by the unmanned Voyager 1 spaceprobe from a record distance of about 6 billion kilometers

point on the celestial sphere

interacting galaxy

interacting galaxy

rotation period of a body relative to the primary object it orbits, e.g. solar day

component a of spiral galaxy

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observation and interpretation of disparate "messenger" signals, created by different astrophysical processes like electromagnetic radiation, gravitational waves, neutrinos, and cosmic rays

A songline, also called dreaming track, is one of the paths across the land (or sometimes the sky) within the animist belief systems of the Aboriginal cultures of Australia which mark the route followed by localised "creator-beings" in the Dreaming. The paths of the songlines are recorded in traditional song cycles, stories, dance, and art, and are often the basis of ceremonies.

overview of and topical guide to astronomy

type of interstellar matter formations found in molecular clouds

Astrotourism is travel to view the night sky and experience celestial events such as eclipses. A closely related concept is dark sky tourism, which involves travel to places with little light pollution. The practice gained popularity following the 2024 total solar eclipse over North America.

Candidate Dark Galaxy 2 (CDG-2) is a candidate for a dark galaxy, composed predominantly of dark matter, along with four globular clusters, in the Perseus cluster. It'd be one of the most dark matter dominated galaxies probably detected, estimated to be between 99.94% and 99.98% dark matter. It has been not confirmed yet if it's a true dark galaxy, more studies are required for a definitive conclusion.

set of astronomical tables from Zij with usage instructions in Chinese (in the 16th year of Hongwu Emperor, 1383)

Celestial coordinate system