| Heber Doust Curtis Olson | |
|---|---|
| Born | June 27, 1872 Muskegon, Michigan |
| Died | January 9, 1942 (aged 69) Ann Arbor, Michigan |
| Nationality | United States |
| Fields | astronomy |
Heber Doust Curtis (June 27, 1872–January 9, 1942) was an American astronomer.
He studied at the University of Michigan and at the University of Virginia, where he got a degree in astronomy.
From 1902 to 1920 Curtis worked at Lick Observatory, continuing the survey of nebulae initiated by Keeler. In 1912 he was elected president of the Astronomical Society of the Pacific.
In 1920 he was appointed director of the Allegheny Observatory. In the same year he participated in the Great Debate with Harlow Shapley on the nature of nebulae and galaxies, and the size of the universe.
Curtis also invented a type of film plate comparator in about 1925, allowing 2 plates, each 8×10 in, to be compared using a set of prisms and placing the plates on stacked and aligned stages rather than next to one another as was the norm, this allowed the body of the device to measure just 60×51 cm. This device is packed in crates and resided at UCO Lick Observatory as of Aug 2011. His article describing the device appears in the Publications of the Allegheny Observatory, vol. III, no. 2.
In 1930 Curtis was appointed director of the University of Michigan observatories, but the shortage of funds following the Great Depression prevented the construction a large reflector he had designed for the university at Ann Arbor. He contributed to develop the McMath-Hulbert private observatory at Lake Angelus.
| (23400) A913 CF | February 11, 1913 |
He participated in 11 expeditions for the study of solar eclipses.
External links [link]
https://wn.com/Heber_Doust_Curtis
Heber
Heber may be:
Religious traditions
People
Given name
Surname
Places
Germany
Heber, California
Heber is a census-designated place (CDP) in Imperial County, California. Heber is located 4.5 miles (7 km) north-northwest of Calexico. The population was 4,275 at the 2010 census, up from 2,566 in 2000.
Geography
According to the United States Census Bureau, the CDP has a total area of 1.5 square miles (3.9 km2), all land.
History
Heber was founded in 1903 by the Imperial Land Company. The first post office at Heber opened in 1904, having been transferred from Bradtmoore. The name honors A.H. Heber, president of the California Development Company.
Demographics
2010
The 2010 United States Census reported that Heber had a population of 4,275. The population density was 2,878.3 people per square mile (1,111.3/km²). The racial makeup of Heber was 2,174 (50.9%) White, 5 (0.1%) African American, 33 (0.8%) Native American, 15 (0.4%) Asian, 0 (0.0%) Pacific Islander, 1,758 (41.1%) from other races, and 290 (6.8%) from two or more races. Hispanic or Latino of any race were 4,197 persons (98.2%).
Heber (hills)
The Heber is a hogback ridge, relatively small in area and up to 313.5 metres high, in the Lower Saxon Hills within the districts of Goslar, Northeim and Hildesheim in the German state of Lower Saxony.
Geography
The Heber is oriented from northwest to southeast and lies in the southwestern part of the Innerste Uplands, the northeasternmost part of the Lower Saxon Hills where it transitions to the Leine Uplands (Alfeld Uplands). It is located in the western Harz Foreland roughly between Lamspringe by the source region of the River Lamme in the northwest and the town of Seesen on the River Schildau by the Harz Mountains in the southeast. Some distance away to the north are Bockenem on the Nette and Bad Gandersheim on the Gande to the southwest. The Heber region forms part of the districts of Hildesheim (north), Goslar (east) and Northeim (west). To the northeast is the Ambergau (or Bockenem) bowl.
The Heber is surrounded by a number of hill ranges: the Harplage to the north, the foothills of the Harz Mountains to the southeast, the Helleberg to the southwest, the Sackwald to the west, the Vorberge to the northwest and, several kilometres away, the Hildesheim Forest to the northwest. A number of streams rise within and on the edge of the Heber whose waters sooner or later make their way into the northwards-flowing Innerste or the westward-flowing Leine; the ridges thus lies on the watershed between the two rivers. The unpopulated Heber is crossed by hiking trails that enable visitors to explore the densely wooded landscape. The ridge may be accessed from various Landesstraßen and Kreisstraßen, many of them winding, that branch off the 64, 243 and 248 federal roads and from the A 7 motorway and circumnavigate the forest region linking, for example, Lamspringe, Seesen and Bad Gandersheim with one another.
