Search results
Results from the WOW.Com Content Network
A map of North America (without Greenland) with 23 national flags, excluding the flags of the dependencies and other territories. This is a gallery of flags of North American countries, territories and their affiliated international organizations.
There is also astronomical evidence of interest from early Chinese, Central American and North European cultures. [2] Astronomy was used by early cultures for a variety of reasons. These include timekeeping, navigation, spiritual and religious practices, and agricultural planning. Ancient astronomers used their observations to chart the skies ...
By historical astronomy we include the history of astronomy; what has come to be known as archaeoastronomy; and the application of historical records to modern astrophysical problems." Historical and ancient observations are used to track theoretically long term trends, such as eclipse patterns and the velocity of nebular clouds.
They are the first evidence of the center of the Milky Way, and the firsts experiences that founded the discipline of radio astronomy. 1933 – Edward Milne names and formalizes the cosmological principle. 1933 – Fritz Zwicky shows that the Coma cluster of galaxies contains large amounts of dark matter. This result agrees with modern ...
Central America was a unified nation at several points throughout its history, and while united, the country has used several national flags. The design of the Central American flag, a blue and white horizontal triband, was inspired by the flag of Argentina. [2] [3]
The first major Arabic work of astronomy is the Zij al-Sindh by Muhammad ibn Musa al-Khwarizmi. The work contains tables for the movements of the Sun, the Moon, and the five planets known at the time. The work is significant as it introduced Ptolemaic concepts into Islamic sciences. This work also marks the turning point in Arabic astronomy.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Sir Arthur Eddington publishes The Expanding Universe: Astronomy's 'Great Debate', 1900–1931 in Cambridge. Comedian Will Hay observes the periodic Great White Spot on Saturn from his private observatory in London. [1] Fritz Zwicky postulates the existence of dark matter. [2]