NGC 4755: A Jewel Box of Stars . ... Credit Copyright: Michael Bessell ( RSAA, ANU ), MSO Explanation: The great variety of star colors in this open cluster underlie its name: The Jewel Box . ... Open clusters are younger, contain few stars, and contain a much higher fraction of blue stars than do globular clusters. This Jewel Box lies about 7500 light-years away, so the light that we see today was emitted from the clusters before even the Great Pyramids in Egypt were built. ...

... Belts . ... Speed of motion is " kinetic energy ", like the energy of a turning flywheel or of the wind hitting a windmill, both of which can move machinery. ... As the hot gas of the corona--a plasma, really--expands upwards, its heat is converted to the kinetic energy of a fast flow, streaming outwards: the solar wind . Four or five days after leaving the Sun, solar wind plasma hits the magnetosphere, an obstacle in its path. ... How is solar wind energy transmitted to the magnetosphere? ...

... Belts . ... Speed of motion is " kinetic energy ", like the energy of a turning flywheel or of the wind hitting a windmill, both of which can move machinery. ... As the hot gas of the corona--a plasma, really--expands upwards, its heat is converted to the kinetic energy of a fast flow, streaming outwards: the solar wind . Four or five days after leaving the Sun, solar wind plasma hits the magnetosphere, an obstacle in its path. ... How is solar wind energy transmitted to the magnetosphere? ...

... Galileo was one of the first to study our Milky Way with a telescope in 1610 and he discovered that it was composed of a huge number of faint stars. ... Image Credit: NASA Elliptical Galaxy This image from NASA's Hubble Space Telescope shows a good example of an elliptical galaxy at the centre of a galaxy cluster that is over 450 million light-years away in the direction of the constellation Centaurus. ... Then the Andromeda galaxy was first classed as a galaxy outside of our own Milky Way. ...

One possible way for spiral galaxies to internally evolve would be for gas to flow to the center and form stars in a central disk (pseudo-bulge). ... In this paper we present radial profiles of stellar and 8 ЮМm emission from polycyclic aromatic hydrocarbons (PAHs) for 11 spiral galaxies to investigate whether the interstellar medium in these galaxies contains a central concentration above that expected from the exponential disk. ...

... Tonight's Sky . ... Observing . ... Astronomy for Kids . ... How fast is the universe expanding? Astronomers independently confirm a value for the Hubble constant, a number that reveals the universe's size, age, and eventual fate. ... The Hubble constant, named for astronomer Edwin Hubble, who first observed cosmic expansion in 1929, is one of the fundamental numbers cosmologists use in describing our universe. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

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... STScI-PRC00-04 AN EXPANDING BUBBLE IN SPACE Astronomers, using the Wide Field Planetary Camera 2 on board NASA's Hubble Space Telescope in October and November 1997 and April 1999, imaged the Bubble Nebula (NGC 7635) with unprecedented clarity. ... The remarkably spherical "Bubble" marks the boundary between an intense wind of particles from the star and the more quiescent interior of the nebula. ... To the right of the central star is a ridge of much denser gas. ...

... 2001 September 3 . The Making of the Rotten Egg Nebula . ... Explanation: Fast expanding gas clouds mark the end for a central star in the Rotten Egg Nebula . ... Some of the liberated energy causes the outer envelope of the star to expand. ... Thick gas and dust hide the dying central star. The Rotten Egg Nebula , also known as the Calabash Nebula and OH231.8+4.2, will likely develop into a full bipolar planetary nebula over the next 1000 years. ... About APOD | ...

Bigbang Forum Message . Forums: . ... Big Bang | ... Hubble's Law And The Big Bang . ... Hubble?s Law tell us that the universe is expanding and the farther away an object is, the faster it is moving. ... Please indulge my curiosity and offer me your opinion on these few problems I see with Hubble?s Law and Constant and the Big Bang. ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

... CentralProcessor 0.11 documentation . ... The Central Processor Manager is the local monitoring and control agent for the Central Processor sub-system. ... At the moment the Central Processor Manager only controls the acquisition phase; that is, it only controls the ingest pipeline. ... In addition to the CP manager specific parameters, any parameters that begin with ice_properties are passed directly to the ICE Communicator during initialisation. ... string . ... Central Processor Manager . ...

Next: Computation of the Up: Typical Run Previous: Edition of the . This table is used both as an input and output by the main program. The table content is: . INPUT . Parameters relative to the absorption lines . ... OUTPUT . In output, the program will write in this table, for each absorption line, the velocity of the corresponding cloud relative to the source and its redshift (relative to the observer). A template of this table can be found in MID_CLOUD:ABSC.TBL . ...

... Home . ... At Home Among the Galaxies . Dr. William Waller, Tufts University . Thursday, Mar 13, 2008 at 8:00 PM . ... He carries out a variety of research on star-forming galaxies via observations with ground-based and space-borne telescopes. ... Please join us for a pre-meeting dinner discussion at Changsho, 1712 Mass Ave, Cambridge, MA at 6:00pm before the meeting. ... Mar . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Science Users Information > Science and Technical Meetings > Conferences 1998 > eso-osa98 . ... The European Southern Observatory and the Optical Society of America are cosponsoring for the second time a topical meeting on Adaptive Optics. ... The meeting will cover the full range of topics from astronomical observational results and techniques, to foreseen breakthroughs in astrophysics due to new generation systems, from data reduction techniques, to AO system engineering and developments. ...

... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

A Symplectic Integration Scheme that Allows Close Encounters between Massive Bodies J. E. Chambers, Armagh Observatory Mixed­variable symplectic integrators provide a fast, moderately accu­ rate way to study the long­term evolution of a wide variety of N­body sys­ tems (Wisdom & Holman 1991). ... A symplectic integrator works by splitting the Hamiltonian, H , for an N­body system, into two or more parts H = H 0 + H 1 + \Delta \Delta \Delta, where ffl i = H i =H 0 Ь 1 for i = 1; 2 : : :. ...

Prime focus adapter . The optical reducer is mounted on the universal adapter of the prime focus, which contains two movable bundles of fibers for the off-axis guiding, lamps for the calibration of the wavelength scale (a He-Ne-Ar lamp) and for flat fielding (a continuous spectrum lamp). The lamps are placed in an integrating sphere providing uniform illumination of the field. ...

... The SAS_ODF environment variable shall be set to the summary file produced by odfingest , or to a directory containing the data, and access to calibration files shall be set through cifbuild . ... In order to process a single exposure containing fast mode data as . ... Note that tracking data may not be good enough, in which case no plot is produced. omdrifthist set =/path_to_your_data/fast/tmp_tracking plotfile =/path_to_your_data/fast/P0125321001OMS002TSHPLT0000.PS trackradius =0.5 hardcopy =yes ....

... The remote area was formed very early, at a time when the Universe was a fifth of its present age and the presence of the galaxy string defies existing models, which can not explain how a string this big could have formed so long ago. ... The simulations tell us that you cannot take the matter in the early Universe and line it up in strings this large," Dr Francis said. ... But in the early Universe, most galaxies had not yet formed, and most dark matter clouds will not yet contain a galaxy. ...