Asteroid close approaches: analysis and potential impact detection A. Milani1, S. Chesley2, P. Chudas2, G. Valsecchi3 1Dipartamento di Mathematica, Universita di Pisa, Pisa, Italy 2Jet Propulsion Laboratory, California Institute of Technology, USA 3IAS-CNR, Roma, Italy The last ten years have seen tremendous progress in our ability to assess the risk that an asteroid or comet might collide with the Earth. ... Pasadena: Jet Propulsion Laboratory, 1992. ...

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IV International Astronomy Olympiad . ... Text of these problems is available also . ... To solve every problem you may use constants and well-known values you know by heart. ... The apparent diameter of the Moon, as seen from the Earth, is 31'. ... Can you observe a star with magnitude . ... Consider the stars as black bodies. ... Estimate the diameter of a black hole constructed using this patent from a ship with the mass of 5000 tn (1 tn = 1000 kg). ... What stars would you observe this nigth? ...

These routines are meant to provide high level definition and processing of command lines. ... Create a control panel object. panel_create_group . Create a panel to contain a group. panel_add_item . ... Pop last pushed control panel object from control panel stack. panel_process_command_with_stack . ... Register a function to be called when a panel item changes. panel_PROTO_decode_func . ... This routine will create a control panel object which is a container for a group of items. ... flag . ...

... They are the offset in arcseconds for the x and y inst plane offset, the exposure time in seconds, and the number of exposures at each position. ... A point about offsets should be made here. The dither program uses absolute instrument plane offsets, so you should use object plane offsets to center up on the chip so that the script starts from where you centered up. INST and OBJ offsets are independent so an object offset will not be zeroed out by and inst plane offset, just added to it. ...

Name Last modified Size Description . Parent Directory - 20110412/ 2013-04-22 17:18 - 20130412/ 2013-04-22 17:07 - . Apache/2.4.6 (Linux/SUSE) Server at www.astro.louisville.edu Port 80

... Bad Astronomy . ... This page has images and links that George Noory and I discussed on the Coast to Coast AM radio show on Friday night, July 29, 2005. ... Two new objects were announced today, and both are big, maybe as big as Pluto. One is almost certainly bigger than Pluto! ... I've been saying for years that we will almost certainly find something bigger than Pluto out there in the dark, cold reaches of our solar system (I've said so on Coast to Coast several times, actually). ...

... Astrophysics Group . ... Pulsars . ... Stars ? ... The array was designed to detect compact radio sources such as these by virtue of the fact that they would scintillate (twinkle) when observed from the Earth through the interplanetary medium ? ... One of Antony Hewish?s research students, Jocelyn Bell, was set the task of operating the telescope and inspecting the daily charts for the kind deflections in the trace which occurred when a scintillating source passed over the array. ...

... Ephemerides . ... Natural Satellites Data Center service. ... Please complete the form below, fields marked with * should be filled. See List of keywords for object List of keywords for subject Main journals list . ... by Keywords Title Title, Keywords and Abstract Authors Journal/Livre/Rapport: . ... AND OR NOT Exact sentence (within this field) AND . ... AND OR NOT Exact sentence (within this field) . ... Keywords . ... AND OR NOT Exact sentence . within this field) . ...

... For the past years I have been working on the problem of synthesis of light curves of close binary systems, consisting of a normal star and a compact object (point object with fixed X-ray luminosity). ... Possible existence of a bright spot on the disk's lateral surface is taken into account. ... The last of then will be published in Gordon and Breach Publishers ( Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ... Cherepashchuk A.M., Katysheva N.A., Khruzina T.S., Shugarov S.Yu. ...

... Each IYA Discovery Guide includes: . ... The Night Sky Network is a nationwide coalition of amateur astronomy clubs bringing the science, technology, and inspiration of NASA's missions to the general public. ... The Night Sky Network's International Year of Astronomy (IYA) Discovery Guides are supported and sponsored by the NASA Forums and missions listed below: . Space Telescope Science Institute's Origins Education Forum . ... NASA Education Forum on the Structure and Evolution of the Universe . ...

import numpy as np import string as st import time as tm # HA, Dec - Az, El def hadec_to_azel ( ha_hrs, dec_deg ) : ha_rad = np.pi * ha_hrs / 12.0 dec_rad = np.pi * dec_deg / 180.0 vec = sla_dcs2c(ha_rad, dec_rad) desig, name, of_long, of_lat, elev = sla_obs(0, 'GBVA140') # print of_lat * 180 / np.pi rmat = sla_deuler('yxx', np.pi / 2.0 - of_lat, 0.0 , 0.0 ) new_vec = sla_dmxv(rmat, vec) az, el = sla_dcc2s(new_vec) return {'az': ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Living the тАЬDreamтАЭ, the Dream Chaser; a mini Shuttle? Image credit: NASA) . The main objectives of the Dream Chaser program as described by its makers is to provide a passenger and cargo transportation system into Low Earth Orbit which will in turn help service and maintain the International Space Station. ... The Dream Chaser would be launched by an Atlas V rocket. Image Credit: NASA.) ... Dream Chaser test flight. ...

. A long time ago, in a galaxy far, far away.... obscalendar: 2016-I . manuals: SCORPIO-2 . email: uklein at sao dot ru . office: main building, 506 . phone: +7(878)22- 93-396 . home: b.4, app.36 . Last Revision: 2016, Feb 7

... The space station Mir is the most complex and unique vehicle of the twentieth century. ... It is in proposing to UNESCO the procedure of giving to the space station Mir a status of the object of the World cultural heritage of the mankind as a very valuable unique object of the technical culture of the 20th century, and realization of the special project of its preservation. ... Proactive organization work to get in UNESCO the status of the object of the World cultural heritage for the station Mir; ....

... Tonight's Sky . ... Observing . ... Supernova showered Earth with radioactive debris . ... Astronomy for Kids . ... Michael Rampino: How long will life last on Earth? New York University biologist Rampino describes at length one of his many research specialties: catastrophic impacts on Earth, including the K-Pg Impact that killed the dinosaurs some 66 million years ago, and muses on life in the universe. ... Only registered members of Astronomy.com are allowed to comment on this article. ...

... The game is a little "buggy", on fast computers: you may click an "operate" action, and even though you see the action result, the game may respond with "nothing happened!" (even though it did). ... By the way, the object of the game is to find the dead girl and bring her back to life. ... Open door in front of you to garden, take empty water bucket and operate it on the fountain; you'll get a bucket of water (you can also get water from the kitchen or from two bathrooms by operating the water taps)...

Pulkovo Database of Observations of Planets and Their Satellites . Select object, time interval and type of observations . ... First year (optional) . Last year (optional) . ... satellite relative to planet . satellite relative to another satellite . ... Select database . ...

... Recent Topics . ... MAO main . Info . ... Topic started 1 year 8 months ago by yatskiv . ... Last Post by yatskiv . 1 year 8 months ago . ... Topic started 1 year 8 months ago by nvpech . ... Last Post by nvpech . ... Topic started 1 year 8 months ago by info . ... Last Post by info . ... Topic started 1 year 8 months ago by berczik . ... Last Post by berczik . ... Board Categories MAO main - Info - MAO - news - Flame Technical - Technical Support(Forum)(Техподдержка(Форум)) . ...

... The project assumes creation of an international space observatory - the interferometer "Earth - Space - Space" in order to perform of astronomical investigations in millimeter, submillimeter and infrared regions with extremely high sensitivity (to a few nanoJanskies units of flux density in continuum spectrum) and extremely high angular resolution (to a parts of microsecond of arc or, possibly, nanosecond). ... radio-interferometric channels of the system "Space - Space", region 0.2 - 3 mm; . ...