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William Kenneth Hartmann (born June 6, 1939) is an American planetary scientist, artist, author, and writer.He was the first to convince the scientific mainstream that the Earth had once been hit by a planet sized body (), creating both the Moon and the Earth's 23.5° tilt.
Historically, optical astronomy, which has been also called visible light astronomy, is the oldest form of astronomy. [58] Images of observations were originally drawn by hand. In the late 19th century and most of the 20th century, images were made using photographic equipment.
From a bar in the clouds to finding more water from the Moon, outer space is constantly surprising us. The post 24 Astronomy Facts You Never Learned in School appeared first on Reader's Digest.
Portal:Astronomy/Did you know/13 ... that lenticular galaxy NGC 1553 is located at the center of the Dorado Group , and has a spiral feature that is only visible in X-rays ? ... that giant diffuse galaxies , located in the centre of galaxy clusters , often possess a halo of devoured star matter extending as far out as 3 million light years ?
This is a list astronomy websites. Some of them are CalSky, Exoplanet Archive, Exoplanet Data Explorer, Extrasolar Planets Encyclopaedia, Universe Today, Space.com and Galaxy Zoo. Out of all these Exoplanet Archive is managed by NASA. These websites provide knowledge about exoplanets, eclipses, tides, comets, stars, galaxy and other topics ...
This globe is an interesting example of how celestial globes demonstrate both the scientific and the artistic talents of those who make them. All forty-eight classical constellations used in Ptolemy's Almagest are represented on the globe, meaning it could then be used in calculations for astronomy and astrology, such as navigation, time ...
An image of a protoplanetary disk, comparable to images of simulations of the Solar System's interplanetary dust cloud, which has been suggested to be imaged from beyond it in the Outer Solar System. [12] The interplanetary dust cloud has a complex structure (Reach, W., 1997). Apart from a background density, this includes:
Geody Star Charts – Free (CC-by-sa) printer friendly star charts for several latitudes and times of the year; An online star chart; Monthly sky maps for every location on Earth Archived 2007-09-13 at the Wayback Machine; The Evening Sky Map – Free monthly star charts and calendar for northern hemisphere, southern hemisphere, and equatorial ...