n
(astronomy) The intrinsic luminosity that a celestial body would have if viewed from a distance of 10 parsecs or about 32.6 light years.
n
(astronomy) The amount of air through which light from a celestial object passes, normalized to 1 for an object at zenith.
n
(astronomy, archaic or historical) An instrument for observing the heavenly bodies as they cross such a circle.
n
(astronomy) a scale of seeing conditions used by amateur astronomers.
n
(astronomy) The brightness of a star as measured by an observer, as opposed to its intrinsic brightness when corrected for distance or absorption.
n
(astronomy) a numerical measure of the brightness of a star, planet etc.; a decrease of 1 unit represents an increase in the light received by a factor of 2.512
n
Ellipsis of Arecibo Observatory.; a radio astronomy astronomical observatory located in Arecibo, Puerto Rico
n
(astronomy) An interstellar radio message broadcast on 16 November 1974 into the globular cluster Messier 13 in the hope that extraterrestrial intelligence might receive and decipher it.
n
An astronomical and navigational instrument for gauging the altitude of the Sun and stars.
n
(astronomy) The branch of astronomy that deals with the measurement of the positions and motions of celestial bodies, particularly stars.
n
Netherlands Institute for Radio Astronomy, a research institute in the Netherlands.
n
(astronomy) A localized discrete transient optical spectrum event at astronomical distances.
n
(astronomy, photography) An image of one or more celestial objects made using techniques of astrophotography.
n
The determination of the brightness of stars and other heavenly bodies.
n
(obsolete) observation of the stars
n
The technology of astronomy
adj
(astronomy) Of the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.
n
(nuclear physics) A phenomenon sometimes observed when a criticality incident occurs in nuclear materials, inducing a discharge of radiation into the environment.
n
(astronomy) The difference between the bolometric magnitude and visual magnitude of a star
n
(astronomy) A spectrum obtained by taking the average of a number of observations
n
(astronomy) An instrument intended to represent the revolution of a comet around the Sun.
n
(astronomy) The viewing of near-sun or near-stellar objects using a coronagraph
n
low-level infrared radiation originating from all directions in space
n
(astronomy) An energetic particle originating outside our solar system.
n
(physics) any of a series of dark lines in the solar spectrum; due to the absorption of light by atoms and molecules in the Sun's atmosphere
n
(astronomy) An observational branch of astronomy, which deals with the study of gamma-ray emission from celestial objects.
adj
(physics, astronomy) Of a star, specifically its poles: brighter due to gravity brightening.
n
(astronomy, space flight) The Hubble Space Telescope.
n
(physics, astronomy) a spectral line of atomic hydrogen having a wavelength of about 21cm; used extensively in radio astronomy
n
(astronomy) the astronomical observation and study of objects, cooler than most stars, using the infrared part of the electromagnetic spectrum
n
The polarization of the light received from distant stars as a result of interaction with dust particles
n
The brightness a star would have if not attenuated by distance or intervening gas or dust. As opposed to apparent brightness which it has as measured at a distance.
n
(astronomy) Communications by means of laser light.
n
(astronomy) a graph of the intensity of radiation from an astronomical object as it changes with time
n
(physics, astronomy) The optical effect where, when certain wavelengths (not in the spectrum of visible light) are examined, the edge of the disk of a star appears brighter than the center of the disk.
n
(astronomy) The refraction / focusing of light by the gravitational field of a galaxy or cluster, as opposed to that caused by a single star
n
(uncountable) The apparent brightness of a star, with lower magnitudes being brighter; apparent magnitude
n
(astronomy) The generation of microwaves by the maser method.
n
A very large scale used, for example, in astronomy
n
(archaic) The part of astronomy that deals with heavenly bodies, the distance of stars, etc.
n
(astronomy) astronomy based on the coordinated observation of two or more of electromagnetic radiation, gravitational waves and subatomic particles such as cosmic rays or neutrinos
adj
(astronomy) Describing the use of multiple types of wave to study distant objects
n
(astronomy) Astronomy using infrared, visible, and/or ultraviolet wavelengths.
v
(transitive) To measure (a distance) based on parallax observations.
n
(photography, optics) The apparent motion of a tracking-locked foreground object against a background, when the camera is moving across the environment. (ie. A stationary object will appear to move across a background, when a moving camera is locked to track it)
n
(astronomy) A function that describes the angular distribution of light reflected from a body when illuminated from a specific direction
n
(astronomy) The circular area of an astronomical object that emits light
n
(astronomy) A technique that uses radar echoes to examine bodies within the solar system, obtaining information about size, shape, topography, surface density, spin etc.
n
(astronomy, physics) A region of high-energy charged particles which partly surrounds a planet or star, trapped by its magnetic field and characterized by intense radiation.
n
The branch of astronomy which utilizes radio waves through the use of radio telescopes to study celestial bodies and occurrences.
n
(astronomy) A brief emission of intense radio waves from a star etc.
n
(astronomy) Any astronomical object that emits radio waves.
n
(astronomy) A device for observing astronomical sources of radio waves, normally having one or more large parabolic dishes.
adj
(astronomy) That emits significant amounts of radio waves; radio-luminous
adj
(astronomy) That emits significant amounts of radio waves; radio-bright.
n
Alternative spelling of radio astronomy [The branch of astronomy which utilizes radio waves through the use of radio telescopes to study celestial bodies and occurrences.]
n
(uncountable) The detection and locating of distant objects using microwave radiation; especially radar
adj
(astronomy) Producing radio emissions.
n
(astronomy) The morphology of radio stars (and similar radio sources)
n
A pulsar that emits only radio waves
n
Alternative spelling of radio telescope [(astronomy) A device for observing astronomical sources of radio waves, normally having one or more large parabolic dishes.]
n
(astronomy) A burst of high-energy radiation (such as gamma rays)
adj
(astronomy) (of light and other radiation) Increased in wavelength as a consequence of redshift
adv
(physics) Towards the red end of the spectrum
n
(astronomy) A system of lines forming small squares of standard size, which is photographed, by a separate exposure, on the same plate with star images to facilitate measurements, detect changes of the film, etc.
n
(astronomy) A heliostat that may be used with stars as well as the sun.
n
(astronomy, astrophysics) An astrophysical event that can be used for calculating cosmic distances.
n
Device that moves so as to aim a collector of solar energy at the sun as it crosses the sky
n
(meteorology) Any phenomena related to the radiation and particles emitted by the Sun, especially in the vicinity of the Earth that may have an effect on the Earth or human activity in the space.
n
(astronomy) A binary star in which the component stars are close together and can only be resolved via spectroscopy
n
(creationism, pseudoscience) The conflict between Young Earth creationism (asserting that the universe is thousands of years old) and the starlight-related measurements that show the universe to be billions of years old.
n
The remote control of scientific apparatus, such as those on spacecraft.
n
(astronomy) An astronomical telescope which is physically located on the surface of the Earth, as distinct from a telescope located in outer space.
n
(astronomy, meteorology, aviation) Any of a variety of upper atmospheric optical phenomena associated with thunderstorms.
n
(astronomy) An observational branch of astronomy, which deals with the study of ultraviolet emission from celestial objects.
n
(astronomy, countable) A chart or catalogue of fixed stars, especially of stars visible to the naked eye.
n
(astrophysics) Synonym of Van Allen radiation belt
n
(astronomy) The apparent magnitude of a star in the central part of the spectrum of visible light
n
(astronomy) An observational branch of astronomy, which deals with the study of X-ray emission from celestial objects.
n
(astronomy) An instrument that detects X-rays originating from outside the Earth's atmosphere.
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