Observational astronomy

faintest apparent magnitude of a celestial body that is detectable or detected by a given instrument

angle between incident and reflected light in astronomy

thumb|Starry sky crossed with the Milky Way and a [[meteor]]

astronomical survey

Extraterrestrial view of outer space

Meteoroid that enters Earth's atmosphere and leaves again

daily and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates and orbits the Sun

atmospheric window

astronomical measurand

extremely low luminosity galaxy

Galaxy in the constellation Haar der Berenike

time between earliest and latest observations of a Solar System body like an asteroid or comet

study of how astronomical objects change with time

astronomy competition

NASA satellite of the Explorer program

astronomy with terahertz (< 1 mm)-range light

tower in Vatican City

optical path length through Earth’s atmosphere for light from a celestial source

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

interferometric arrangement

phases of the Earth as seen from the Moon

Calculation in astronomy

type of spectrum apart from the Big Bang, whichever shows the universe

bias towards bright objects in astronomy

technique for viewing faint objects

automated telescopes that search for new supernovae and other astronomical transients

astronomical instrument for measuring angular diameter of stars by means of interferometry

area of sky useful for deep space observations due to low levels of neutral hydrogen gas

infrared radiation caused by stellar dust

international scientific research project to search for extraterrestrial intelligence or extraterrestrial technology

astronomic or geodetic instrument which is directed exactly to the zenith

weather conditions categorization system

detecting planets located outside the Solar System

astronomical survey

reference star used by telescopes for tracking purposes

thumb|300px|MAGIC (telescope)|MAGIC, a Cherenkov telescope in operation on the Canary island of [[La Palma. On foggy nights, the lasers that are used to focus the mirrors can be seen.]] IACT (imaging atmospheric [or air] Cherenkov telescope [or technique]) is a device or method to detect very-high-energy gamma ray photons in the photon energy range of 50&nbsp;GeV to 50&nbsp;TeV.

Astronomical magnitude system

the rate at which an astronomical object is moving away, typically from Earth

collection of >500 galaxies within 11 megaparsecs from Earth

ground-based search for extrasolar planets

Overview of Chinese records of comets

astronomical survey focused on measuring red shifts of distant galaxies

citizen science project

methods and instruments used to observe the Moon

astrophysical technique

A nuller is an optical instrument, e.g., a beam combiner for nulling interferometry, used to block or cancel out a strong source so that fainter signals near that source can be observed. This is typically useful to detect off-axis exoplanet or exozodiacal dust by interferometrically nulling out the on-axis parent star.

imaging technology for x-ray or gamma sources

topic in astronomy

independent confirmations of Apollo Moon landings

Wikimedia list article

Map survey of the universe

visual perception of the sky and how it scatters and diffuses light.

astronomical survey by the Hubble Space Telescope

astronomical observatory mainly dedicated to public and educational purposes

type of observed X-ray astronomy pattern

the angle between the great circle through a celestial object and the zenith, and the hour circle of the object