| Heber Doust Curtis | |
 Heber Doust Curtis
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| Born | June 27, 1872 |
|---|---|
| Died | January 9, 1942 |
| Nationality | United States |
| Fields | astronomy |
Heber Doust Curtis (June 27, 1872–January 9, 1942) was an American astronomer. Events 1358 - Republic of Dubrovnik is founded 1709 - Peter the Great defeats Charles XII of Sweden Year 1872 ( MDCCCLXXII) was a Leap year starting on Monday (link will display the full calendar of the Gregorian Calendar (or a Leap year Events 475 - Byzantine Emperor Zeno is forced to flee his capital at Constantinople. Year 1942 ( MCMXLII) was a Common year starting on Thursday (the link will display the full 1942 calendar of the Gregorian calendar. The United States of America —commonly referred to as the Astronomy (from the Greek words astron (ἄστρον "star" and nomos (νόμος "law" is the scientific study Events 1358 - Republic of Dubrovnik is founded 1709 - Peter the Great defeats Charles XII of Sweden Year 1872 ( MDCCCLXXII) was a Leap year starting on Monday (link will display the full calendar of the Gregorian Calendar (or a Leap year Events 475 - Byzantine Emperor Zeno is forced to flee his capital at Constantinople. Year 1942 ( MCMXLII) was a Common year starting on Thursday (the link will display the full 1942 calendar of the Gregorian calendar. Historically Astronomy was more concerned with the classification and description of phenomena in the sky while Astrophysics attempted to explain these phenomena
| (23400) A913 CF | February 11, 1913 |
He served as director of the Allegheny Observatory. Minor planet is a term used since the 19th century to describe objects such as Asteroids that are in Orbit around the Sun but are not Planets Events 660 BC - Traditional founding date of Japan by Emperor Jimmu. Year 1913 ( MCMXIII) was a Common year starting on Wednesday (link will display the full calendar of the Gregorian calendar (or a Common The Allegheny Observatory is an American astronomical research institution a part of the Department of Physics and Astronomy at the University He is best known as one of the participants in the "Great Debate" of 1920 with Harlow Shapley on the nature of nebulas and galaxies and the size of the universe. This is about the infamous discussion of astronomy For the Dream Theater song about Stem cell research, see The Great Debate (song. Year 1920 ( MCMXX) was a Leap year starting on Thursday (link will display 1920 of the Gregorian calendar Harlow Shapley ( November 2 1885 &ndash October 20 1972) was an American Astronomer. A nebula (from Latin: "mist" pl nebulae or nebulæ, with ligature or nebulas) is an Interstellar cloud of A galaxy is a massive gravitationally bound system consisting of Stars an Interstellar medium of gas and dust, and Dark matter
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