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... 2000 March 20 . Mercury on the Horizon . ... Explanation: Have you ever seen the planet Mercury? Because Mercury orbits so close to the Sun, it is never seen far from the Sun, and so is only visible near sunrise or sunset . If trailing the Sun, Mercury will be visible for several minutes before it follows the Sun behind the Earth . ... An informed skygazer can usually pick Mercury out of a dark horizon glow with little more than determination. ... About APOD | ...

... The NCSA Horizon Image Data Browser is a Java package which includes ready-to-use applets and applications as well as reusable classes for building new applications for browsing scientific images locally or over the network. ... The NCSA Horizon Image Data Browser is a Java package for browsing scientific images. ... Horizon also supports array data as metadata. ... Plante, R. 1997, Supporting Metadata and Coordinate Systems for Scientific Data in the Horizon Java Package , white paper. ...

The radius of the event horizon of a black hole with the mass of the Sun would be about 3 kilometers, about the same size as your city, town or village. If the Earth could be compressed into a black hole, the radius of its event horizon would be 1/330,000 of this, because the mass of the Earth is 1/330,000 times the mass of the Sun. ... 30,000,000 . ... 20,000 . ... Black hole event horizon . ... MYTH: All stars collapse to become black holes upon their death. ... MYTH: Black holes are very dense. ...

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November 5, 2001 (Monday) Xiao-Gang He, National Taiwan University . ... Tuesday, 2:00 pm, 472 Willamette Hall . Fall 2000 . Winter 2001 . Spring 2001 . ... Recent data from type Ia supernovae show that our universe is currently expanding with an accelerating rate. ... I will also discuss how structure formation is affected. 4:00pm, 318 Willamette Hall . ... To facilitate interpretation of this result, model independent analyses are also presented. 2:00 pm, 472 Willamette Hall . ...

The rotation type specifies the meaning of the rotation angle. Only Object and Horizon are typically used for science (or None if your instrument does not have a rotator). ... Mount is typically used for engineering. ... Mount: rotator angle used by the rotator axis controller. ... For an instrument with a rotator: if you specify a rotation type of None and the rotator is moving then it will be halted at approximately its current position; this feature use used to implement a controlled stop. ...

A collapsed black hole in two­dimensional space­time F. Vendrell 1 Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2BZ, U.K. An imploding shell of radiation is shown to create a 2­D black hole within the framework of the ``R = T '' theory. ... 2 The collapsing shell In a two­dimensional space­time we define: ffl (x 0 ; x 1 ) = conformal global coordinates; x \Sigma = x 0 \Sigma x 1 . ... 3 Systems of coordinates ffl The coordinates y I and yE are defined for x \Gamma ? ...

. General Information . Media Files . Participants . Timetable . Local Information . Photos . Back to the album list . Previous . Next Click the image to view it in fullsize. Previous . Next . ASM in twillight. Bright object above the tower is Venus, Mercury is just above the horizon and Saturn between them.

... разработка теории и методов расчета лучевых дифференциалов первого, второго и третьего порядков в градиентных оптических системах; . ... разработка методов расчета геометрических аберраций второго и третьего порядка осесимметричных оптических систем, содержащих асферические поверхности и градиентные среды типа "псевдоаксикон"; . ... получены формулы для расчета смещения изображения и геометрических аберраций второго порядка в градиентных оптических системах с малыми нарушениями осевой симметрии; . ...