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The Royal Astronomical Society of Canada, Victoria Centre, which has a long association with the Dominion Astrophysical Observatory and public outreach dating back to 1914, holds free public "star parties" at the DAO on select summer Saturday evenings. [4]
A digital elevation model (DEM) or digital surface model (DSM) is a 3D computer graphics representation of elevation data to represent terrain or overlaying objects, commonly of a planet, moon, or asteroid.
Sunrise occurs at the prime meridian when the Lunar phase reaches First Quarter, after one fourth of a lunar day. At this location the selenographic colongitude at sunrise is defined as 0°. Thus, by the time of the Full Moon the colongitude increases to 90°; at Last Quarter it is 180°, and at the New Moon the colongitude reaches 270°.
Secchi (lunar crater) nearby: 50000 m: Unknown Spitzbergen: montes: by resemblance to the Spitsbergen islands (German for "sharp peaks") 60000 m: Unknown Taurus: montes: Taurus Mountains (Asia Minor)
Layout of the 30 lunar quadrangles at the 1:2,500,000 map scale Layout of the 144 Lunar quadrangles at the 1:1,000,000 map scale. The Moon has been divided into 30 quadrangles by the United States Geological Survey at the 1:2,500,000 map scale. [1] At the 1:1,000,000 scale it's divided into 144 quadrangles. [2]
In the 2021 Census of Population conducted by Statistics Canada, the Ottawa - Gatineau CMA recorded a population of 1,488,307 living in 604,721 private dwellings, a change of 8.5% from its revised 2016 population of 1,371,576. With a land area of 8,046.99 km 2 (3,106.96 sq mi), it had a population density of 185.0/km 2 (479.0/sq mi) in 2021. [7]
The Holleford Crater is a meteorite crater near the community of Holleford, part of South Frontenac, Ontario, Canada. It is 2.35 kilometres (1.5 mi) in diameter and the age is estimated to be 550 ± 100 million years (Ediacaran or Cambrian). Although there is a surface depression over the area, the crater itself is not exposed at the surface. [1]
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