. Next: EPN_REDIST Up: EMOS_REDIST Previous: Generation from Ground Calibration Contents . Many calibration observations of celestial targets have been used to measure the response function of the MOS detectors as a function of observing date. The response has evolved, particularly at low-energies, and is currently modelled by an empirical formula designed to give consistent results between the EPIC-pn, EPIC-MOS and RGS cameras. Michael Smith 2011-09-20

... The flag on the moon represents an important event in vexillological history. ... During their historic extravehicular activity (EVA), the Apollo 11 crew planted the flag of the United States on the lunar surface. ... Like any activity in space exploration, the Apollo flag-raising also provided NASA engineers with an interesting technical challenge. ... As NASA plans a return to the moon and an expedition to Mars, we will likely see flags continue to go "where no flag has gone before." ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . Celestial Globe on stand by W. Newton, Son Berry, 1836. 16-inches diameter, with compass points at base. ... Newton's new and improved Celestial Globe, on which all the Stars are taken from the elaborate and most improved Catalogue of Piazzi, the Nebulas from Bode and the Double Stars and those with proper motions from South. ... By Mr W Newton. Manufactured by Newton, Son Berry, Chancery Lane, London. ...

... Astrophysics Group . General Interest . ... MRAO Telescopes . ... Galaxies and Quasars . ... Radio astronomy is the study of celestial objects by means of the natural radio waves they emit. ... In 1957, through the generosity of Mullard Ltd. and with support from the Science Research Council, the Mullard Radio Astronomy Observatory (MRAO) was built 5 miles south-west of Cambridge, at Lord?s Bridge. ... 2013, Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge, CB3 0HE . ...

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... Moon Phase below . ... ARTICLE: Why the moon always shows us the same face . ... Before you continue reading, you should know that this was not always the case, i.e. the Moon once was rotating with respect to the Earth, so that on every night a terrestrial observer (if there was one, because this was long, long before mankind appeared on our planet, and even before any major animals had appeared) saw another face of the Moon. ... Figure 1 (not to scale) shows how we can imagine the system Earth-Moon...

СТУДЕНЧЕСКИЕ ОЛИМПИАДЫ МЕХМАТА МГУ И. В. Аржанцев, 1 В. И. Богачев, 2 А. А. Заславский, 3 В. Ю. Протасов, 4 А. М. Райгородский, 5 А. Б. Скопенков 6 n=1 Мы приводим задачи всемехматовских олимпиад 2001 (второй тур), 2008 и 2009 годов, а также указания, решения и комментарии. ... 2008-1. ... Обозначим через m(k) максимальное число попарно не ортогональных векторов из {-1; 0; 1}2k , ровно k координат каждого из которых нулевые. (а) Докажите, что m(k) 22k-1 при нечетном k. (б) Докажите, что 80 m(4) 140. ...

This images in this directory are very wide field color images of the northern night sky at Moore Observatory. They were recorded in February 2012 and in October 2011 to capture Ursa Major and the celestial pole as it would be seen on a dark night. The image nightsky_20120229.jpg shows Ursa Major (locate the pointers at the end of the bowl of the "dipper") and Ursa Minor with Polaris. ... Polaris is a double star, and is slightly variable. ...

... This is usually defined as the direction pointing toward the center of the primary body. ... NODE: The place where the plane of one orbit crosses the plane of another. ... ORBITAL PLANE: The flat surface that would result if every point on the orbit of a body was connected to the center of its primary. ... PENUMBRA: The edge of the primary body's shadow. ... PERIOD : The time required for one body to orbit the primary body. ... PROBE: A vessel designed to pass and observe an astronomical object. ...

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