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? ...

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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 . ...

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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': ...

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. 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

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... 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)...

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... 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; . ...

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