22 relations: Acre, Astrophotography, Bronchitis, Copper, Crowborough, Declination, Dome, Focal length, Gold Medal of the Royal Astronomical Society, Hectare, Inch, Isaac Roberts, List of observatory codes, London, Minor Planet Center, Observatory, Photography, Reflecting telescope, Refracting telescope, Right ascension, Sussex, William Huggins.
The acre is a unit of land area used in the imperial and US customary systems.
Astrophotography is a specialized type of photography for recording photos of astronomical objects, celestial events, and areas of the night sky.
Bronchitis is inflammation of the bronchi (large and medium-sized airways) in the lungs.
Copper is a chemical element with symbol Cu (from cuprum) and atomic number 29.
Crowborough is a town in the Wealden district of East Sussex, England.
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
Interior view upward to the Byzantine domes and semi-domes of Hagia Sophia. See Commons file for annotations. A dome (from Latin: domus) is an architectural element that resembles the hollow upper half of a sphere.
The focal length of an optical system is a measure of how strongly the system converges or diverges light.
The Gold Medal of the Royal Astronomical Society (RAS) is the highest award given by the RAS.
The hectare (SI symbol: ha) is an SI accepted metric system unit of area equal to a square with 100 meter sides, or 10,000 m2, and is primarily used in the measurement of land.
The inch (abbreviation: in or &Prime) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to yard but usually understood as of a foot.
Isaac Roberts FRS (27 January 1829 – 17 July 1904) was a Welsh engineer and businessman best known for his work as an amateur astronomer, pioneering the field of astrophotography of nebulae.
This is a list of observatory codes, or IAU codes, with their corresponding astronomical observatories.
London is the capital and most populous city of England and the United Kingdom.
The Minor Planet Center (MPC) is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids and comets), calculating their orbits and publishing this information via the Minor Planet Circulars.
An observatory is a location used for observing terrestrial or celestial events.
Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image.
A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).
Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.
Sussex, from the Old English Sūþsēaxe (South Saxons), is a historic county in South East England corresponding roughly in area to the ancient Kingdom of Sussex.
Sir William Huggins (7 February 1824 – 12 May 1910) was an English astronomer best known for his pioneering work in astronomical spectroscopy together with his wife Margaret Lindsay Huggins.