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A galactic quadrant, or quadrant of the Galaxy, is one of four circular sectors in the division of the Milky Way Galaxy. In actual astronomical practice...

Mural quadrants were important astronomical instruments in 18th-century European observatories, establishing a use for positional astronomy. The term...

system of quadrants used by non-fictional astronomers. However, rather than have the perpendicular axis run through the Sun, as is done in astronomy, the Star...

Medieval Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age (9th–13th centuries)...

backstaffs. Only the Davis quadrant remains dominant in the history of navigation instruments. Indeed, the Davis quadrant is essentially synonymous with...

Egyptian astronomy started in prehistoric times, in the Predynastic Period. In the 5th millennium BCE, the stone circles at Nabta Playa may have made...

to the Heavenly Waters group.) Star portal List of constellations Quadrant (astronomy) Donald H. Menzel (1975). A Field Guide to the Stars and Planets...

It rose to prominence in the field of positional astronomy at this time. Many older mural quadrants have been constructed by marking directly on the wall...

L. V. (April 2004). "Far-infrared loops in the 2nd Galactic Quadrant" (PDF). Astronomy and Astrophysics. 418: 131–141. arXiv:astro-ph/0401303. Bibcode:2004A&A...

astronomy. For example, the samrāt.-yantra (emperor instrument) is a huge sundial which consists of a triangular gnomon wall and a pair of quadrants toward...

uranography, the modern constellation Lyra is located within the northern quadrant of the sky, which is symbolized as the Black Tortoise of the North (北方玄武...

The octant, also called a reflecting quadrant, is a reflecting instrument used in navigation. The name octant derives from the Latin octans meaning eighth...

of astronomy. Uraniborg was one of the most advanced observatories of its time, equipped with several astronomical instruments, including quadrant instruments...

Astronomy is the oldest of the natural sciences, dating back to antiquity, with its origins in the religious, mythological, cosmological, calendrical...

for measuring incident electromagnetic radiation Canterbury Astrolabe Quadrant – Medieval astrolabe found in England Celatone – Navigational aid reliant...

uranography, the modern constellation Monoceros is located within the southern quadrant of the sky, which is symbolized as the Vermillion Bird of the South (南方朱雀...

A sine quadrant (Arabic: الربع المجيب‎, romanized: rub‘ul mujayyab), sometimes known as a "sinecal quadrant", was a type of quadrant used by medieval...

contributions, which include the invention of the Gunter's chain, the Gunter's quadrant, and the Gunter's scale. In 1620, he invented the first successful analogue...

Ancient Greek astronomy is the astronomy written in the Greek language during classical antiquity. Greek astronomy is understood to include the Ancient...

measuring the harmony of the heavens". It consists of 13 architectural astronomy instruments. The site is one of five built by Maharaja Jai Singh II of...