... Tonight's Sky . ... The Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... The planet has extreme temperature swings and perhaps active lava flows. ... A digital supplement to Astronomy magazine. ... Join TravelQuest International with Astronomy and Discover magazines on one of three great tour options surrounding this celestial spectacle . ... Astronomy Magazine . ...

... Solar System . ... Comets and Asteroids . ... 8 Comments Newly discovered small Solar System body V774104 may seem just another tiny, cold and remote world beyond Neptune but this is an important finding as its mere existence suggests that [ ] . Continue Reading.. ... No Comments In November 2014, the European Space AgencyтАЩs washing-machine-sized investigation and analysis lander lab Philae, did something that no other automated probe had ever done before, it successfully landed on a [ ] . ...

Conserved quantities. Energy, momentum, & angular momentum. ... To start with, let us look at a plot of Specific Angular Momentum versus Specific Energy for every historical comet apparition up to 1995. ... Where do asteroids fit in? ... Why do the points of one cluster group around a vertical line? ... h = angular momentum per unit mass of an orbiting body. ... Lines of constant angular momentum are "1/X" functions on a q vs (1+e) graph, but a little more complex if drawn on the above graph. ...

NATIONAL ASTRONOMY AND IONOSPHERE CENTER . ... Astronomy . ... Visitor Center . ... Comets . ... Observing conditions were favorable at Arecibo July 5-15 2001, and observing time for both spectroscopy of 18-cm OH lines and S-band radar observations were arranged. The comet nucleus was observed to split into two pieces on April 30. ... Because the comet passed within 0.25 AU of the Earth in early July, when it was visible from Arecibo Observatory, it was fairly well suited to radar observation. ...

. [ Go back to Comet WWW site ] . Andrew A. Martis . martis @ sai.msu.ru .

Unlike the other small bodies in the solar system, comets have been known since antiquity. ... As of 1995, 878 comets have been cataloged and their orbits at least roughly calculated. ... When they are near the Sun and active, comets have several distinct parts: . ... A comet whose orbit takes it near the Sun is also likely to either impact one of the planets or the Sun or to be ejected out of the solar system by a close encounter (esp. with Jupiter). ... more comet images . ... HST images . ...

U nlike the other small bodies in the solar system, comets have been known since antiquity. There are Chinese records of Comet Halley going back to at least 240 BC. ... W hen they are near the Sun and active, comets have several distinct parts: . ... A comet whose orbit takes it near the Sun is also likely to either impact one of the planets or the Sun or to be ejected out of the solar system by a close encounter (esp. with Jupiter). ... more comet images . ... Comet Hale-Bopp (C/1995 O1) . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Click for more . ... Binary Star KL Dra . ... Pleasant March: slightly drier, milder and sunnier than average . 2016 April 7th . Cool, damp February with average sunshine; wettest winter for 139 years . 2016 March 16th . Discovering the stars at Armagh: Free St Patrick s day events hosted by Armagh Observatory . 2016 March 15th . ... Mild, wet January, slightly duller than average . ... 2016 January 15th . ...

... In January 2015 using the Mini-MegaTORTORA multichannel optical sky-monitoring system with subsecond temporal resolution, the observations of comet C/2014 Q2 (Lovejoy) and asteroid 357439 2004 BL86 were carried out. ... It was put into operation in 2014. ... Comet C/2014 Q2 (Lovejoy). The 60-min-long observations with the Mini-MegaTORTORA system on Jan 19, 2015 at 16:50 UT, exposure time 30 s, BVR synchronously . ... Asteroid 357439 2004 BL86. ...

Present section of the Laboratory page is an attempt to describe in Russian the complex of problems connected with asteroid - comet hazard. ... The book is an introductory treatise into the problem of the hazard due to asteroids and comets approaching the Earth. The present day knowledge of the dynamics and physics of asteroids and comets, the estimation of the probability of their impacts on the Earth and connected hazard of regional or global catastrophes are described in the book. ...

ПЕРЕЛ?К ПУБЛ?КАЦ?Й СП?ВРОБ?ТНИК?В ГАО . ... Jockers K. Rosenbush V.K. Kiselev N.N. Shakhovskoi N.M. Efimov Yu.S. Korokhin V.V. Optical polarimetry of the Galilean satellites, Iapetus, and 64 Angelina near opposition. ... Jockers K. Rosenbush V.K. Kiselev N.N. et al. ... Jockers K. Korsun P.P. Rosenbush V.K. Kiselev N.N. On the diversity of cometary dust. ... Shakhovskoi N.M. Rosenbush A.E. Rosenbush V.K. Polarimetry of Comet Hale- Bopp: linear and circular polarization, stellar occultation. ...