... 12c. Venus transit (1) . ... Predictions for the transit give four "contact" times, at which the dark Venus disk touches the edge of the Sun's disk (marked by numbers on Figure 3 )" . First contact - Venus disk touches the Sun from the outside , on entry . Second contact - Venus disk touches the Sun from the inside , on entry . Third contact - Venus disk touches the Sun from the inside , on exit . Fourth contact - Venus disk touches the Sun from the outside , on exit . ... sin? sin? ...

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... ARTICLE: The Adventurous Search For The Astronomical Unit . ... Kepler himself had suggested to use the rare occasions of Venus transiting (crossing) the solar disk to measure our distance to the planet. ... Due to the orbital inclination of Venus against the ecliptic of 3.5°, a Venus transit is so rare that it happens only at intervals of 121.5 years, 8 years, 105.5 years, 8 years and so on. ... Crabtree witnessing the transit of Venus 1639 . ... Transits of Venus - The Quest for the Solar Parallax...

Next: Observatory Contacts Up: Submitting a Telescope Proposal Previous: Proposal Deadlines and Procedures . ... The recommendations of the referees serve to guide the Arecibo Scheduling Advisory Committee (ASAC) in respect of the time allocation and relative ranking of all proposals. ... The proposal will be scheduled only if time is available. If not scheduled within the next two 4-month scheduling periods (beginning 4 months after the proposal deadline), the proposers will need to resubmit. ...

... during the 6th June 2012 transit of Venus. ... Nowadays, astronomers use accurate observations of the same phenomenon, that is the transit of an extra solar planet (exoplanet) in front of a distant star, to infer the size and distance of such planets orbiting other stars. ... Armagh Observatory is presently running a Transit of Venus Exhibition, from 10am 11am and 3pm 4pm during week-days, until Tuesday 12th June where some images of the June 2012 transit are on show. ... Last Revised: 2012 June 8th...

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... General information . ... Staff . Research staff . ... Information . ... Historical highlights . Historical research . ... This process is thought to occur in circumstellar disks of gas and dust around young stars on rather short timescales : infrared surveys show that the number of low mass stars with disks drops dramatically for stars older than 10 Myr, suggesting that in order to form large solids before the disk disperses, the growth process has to take place within a few million years. ...

... Telescopes . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... LX - Rear Thread Aluminum Dust Cover . ... Rear Thread Aluminum Dust Cover for SC and ACF optical tubes. ...

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... The SMS program is a critical endeavor to investigate whether the predictions of standard cold dark matter cosmology are consistent with the observed matter distribution in the Milky Way halo. It is the deepest, most extended search for optically elusive dwarf satellite galaxies and tidal streams to date, covering the entire Southern hemisphere. ... However only a few dwarf satellites have been found around the Milky Way to date - 22 dwarfs compared to 500-10,000 predicted by theory (Klypin et al. ...

... Chandra Survey . ... Bulge Windows Survey . ... The ChaMPlane survey is being conducted at the Harvard-Smithsonian Center for Astrophysics. As a complement to our ChaMPlane survey, we have conducted a deep survey of low-extinction windows in the Galactic Bulge. ... were observed (nearly) simultaneously with Chandra and the Wide Field Camera on the Advanced Camera for Surveys (ACS) on HST. ... The Chandra and HST observations for the Bulge Window Survey were carried out from 2003 to 2005. ...

HST observing programs are categorized into a number of different types: . ... GO - General Observer program . ... Please contact your PC or CS if you have a question about your program type. Program Coordinator: The Program Coordinator (PC) is the primary technical point of contact during the development, implementation, planning and scheduling of a program. ... If you have submitted your program and are getting this as your status, you should contact your Program Coordinator for assistance. ...

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Venus Transit 2004 . ... The transit will begin at about 5:13am UT when the leading edge of Venus just touches the sun. ... In Australia, the sun will be setting with Venus in transit and the western portions of the US and Canada will not be able to see the transit at all (ie the sun will rise after the transit has completed). ... Paper Plate Venus Transit Activity . ... NASA Venus Transit Web Site: http://sunearth.gsfc.nasa.gov . Paper Plate Astronomy: http://analyzer.depaul.edu/paperplate/ . ...

Hipparchus (and possibly Aristarchus before him) also derived the Moon's distance from the duration of a lunar eclipse . Because the Earth casts a much larger shadow than the Moon, such an eclipse usually darkens the entire Moon, for several hours. ... If the Sun is assumed to be very distant, and if the Moon crosses the middle of the shadow (if not, corrections must be made), the width of the shadow is expected to be about 2r , twice the Earth's radius r . ... Last updated 4 February 1999 Moon. ...

Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... 2/3-m Telescope . ... Site . ... Commanding . ... In a typical robotic observing scenario, each afternoon, a telescope control computer obtains a set of objects to observe from its home institution from a command or script file. ... The file is then transferred to the telescope control computer at the Winer Observatory in Sonoita. ... The Iowa control computer then begins processing the telrun.sls file. ... 2013 Winer Observatory. ...

... Moscow 119992, . ... Phone: +7 (095) 9391626 . ... I am an associate professor at Cafedra of Astrophysics and Stellar Astronomy of Physical Department of Moscow State University. ... P.A.Bakulin, E.V.Kononovich, V.I.Moroz Course of General Astronomy , Edition 4. Sunspot numbers (Wolf numbers) (from NGDC ) . Книга (с фреймами) В.В.Иванов, А.В.Кривов, П.А.Денисенков "Парадоксальная Вселенная" . Книга (без фреймов) В.В.Иванов, А.В.Кривов, П.А.Денисенков "Парадоксальная Вселенная" ...