Measuring distances in astronomy

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• Astronomy — • Divided into two main branches, astrometry and astrophysics; the former concerned with determining the places of the investigation of the heavenly bodies, the latter, with the investigation of their chemical and physical nature Catholic… …   Catholic encyclopedia

• Astronomy — (from the Greek words astron (ἄστρον), star , and nomos (νόμος), law ) is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth s atmosphere (such as the cosmic… …   Wikipedia

• astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …   Universalium

• ASTRONOMY — In the Bible Although the Bible contains no explicit mention of the science of astronomy, it nevertheless has many references to topics such as the laws of the heavens (Jer. 31:34 (35); 33:25; Job 38:33) and the movements of the sun and the moon… …   Encyclopedia of Judaism

• Measuring rod — Graeco Egyptian God Serapis with measuring rod Gudea of Lagash with measuring rod and …   Wikipedia

• List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

• Aristarchus On the Sizes and Distances — Aristarchus s 3rd century BC calculations on the relative sizes of, from left, the Sun, Earth and Moon, from a 10th century CE Greek copy On the Sizes and Distances (of the Sun and Moon) (Περὶ μεγεθῶν καὶ ἀποστημάτων [ἡλίου καὶ σελήνης]) is… …   Wikipedia

• History of astronomy — History of science …   Wikipedia

• Extinction (astronomy) — Extinction is a term used in astronomy to describe the absorption and scattering of electromagnetic radiation by matter (dust and gas) between an emitting astronomical object and the observer. Interstellar extinction also called Galactic… …   Wikipedia

• Timeline of astronomy — Timeline of astronomy2500 BCMany ancient sites are thought to have astronomical significance, such as the Ancient Egyptian pyramids, Harappan shell instruments, British megaliths, and buildings in China and Latin America.In Lothal, the ancient… …   Wikipedia

• Lunar distance (astronomy) — This article is about the average distance from the Earth to the Moon. For its other use in navigation, see Lunar distance (navigation). Lunar perigee–apogee size comparison In astronomy, a lunar distance (LD) is a measurement of the distance… …   Wikipedia