Read e-book online Herschel 400 Observing Guide PDF

By Stephen James O'Meara

ISBN-10: 0521858933

ISBN-13: 9780521858939

The Herschel four hundred is an inventory of four hundred galaxies, nebulae, and famous person clusters, picked from over 2,500 deep-sky gadgets came upon and catalogued by means of the nice eighteenth-century astronomer Sir William Herschel and his sister Caroline. It contains 231 galaxies, 107 open clusters, 33 globular clusters, 20 planetary nebulae, 2 halves of a unmarried planetary nebula, and seven vibrant nebulae. during this advisor Steve O'Meara takes the observer in the course of the checklist, season by way of season, month through month, evening through evening, item by means of item. He works throughout the gadgets in a delicately deliberate and methodical manner, taking in one of the most dramatic non-Messier galaxies, nebulae, and megastar clusters within the evening sky. perfect for astronomers who've tackled the Messier gadgets, this richly illustrated advisor might help the novice astronomer hone their looking at abilities.

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Das linke Bild zeigt eine Karte des Standorts des VLT auf dem Cerro Paranal. Dorthin gelangt man über Antofagasta, etwa zwei Flugstunden nördlich von Santiago de Chile. Von dort aus sind es weitere drei Stunden Fahrt (siehe Abb. 30). Rechts ist der Paranal während der Bauphase des VLT zu sehen, im Bild-Vordergrund das Camp. Die Spitze des Berges wurde abgetragen, um einen flachen Platz (mit Durchmesser ∼ 300 m) zu erhalten, der groß genug für die Teleskope und die Einrichtungen für die optische Interferometrie (VLTI) ist Abb.

Bei weitem am größten ist der Triumph der Allgemeinen Relativitätstheorie. Sie wurde ursprünglich von Einstein entworfen, weil seine spezielle Relativitätstheorie es nicht ermöglichte, die Newtonsche Gravitation mit einzubeziehen. Zum damaligen Zeitpunkt (1915) gab es keine empirischen Befunde, die nicht mit der Newtonschen Gravitationstheorie beschreibbar waren. Dennoch entwickelte Einstein eine völlig neue Theorie der Gravitation aus rein theoretischen Gründen. Die korrekte Beschreibung der Lichtablenkung an der Sonne, die 1919 gemessen wurde, und der Periheldrehung des Merkur8 waren erste Erfolge der Theorie.

Durch Rebers Untersuchungen und Veröffentlichungen wurde die Radioastronomie nach dem zweiten Weltkrieg ein anerkanntes Wissenschaftsgebiet. Das größte Radio(einzel)teleskop ist das AreciboTeleskop, das in Abb. 19 gezeigt ist. Dieses aufgrund seiner enormen Fläche sehr empfindliche Teleskop entdeckte u. a. den ersten Pulsar in einem Doppelsternsystem, welches zu einem wichtigen ,,Testlabor“ für die Allgemeine Relativitätstheorie geworden ist. Ebenfalls wurde die Existenz von extra-solaren Planeten nachgewiesen – durch einen Planeten im Orbit um einen Pulsar.

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Herschel 400 Observing Guide by Stephen James O'Meara

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