Download Compendium in Astronomy: A Volume Dedicated to Professor by Alan H. Batten (auth.), Elias G. Mariolopoulos, Pericles S. PDF

By Alan H. Batten (auth.), Elias G. Mariolopoulos, Pericles S. Theocaris, L. N. Mavridis (eds.)

When we first approached a few colleagues allover the realm to sound them a few quantity devoted to Professor John Xanthakis at the social gathering of finishing twenty-five years of medical actions as fellow of the nationwide Academy of Athens, any attainable doubts as to the feasibility of the undertaking have been fast dispelled through their hot and inspiring reaction. very quickly 50 authors from 15 nations, coming from a variety of Professor Xanthakis' quick colleagues, scholars and buddies joined to provide the 36 contributions incorporated during this quantity. a few of those that the place initially approached came upon themselves un­ capable of give a contribution, as a result time-limit inevitably imposed. Happi­ ly, they have been in basic terms few in quantity, and we must always prefer to list our grat­ itude to them for his or her reliable needs for the luck of the enterprise. Their hot phrases have been one of several assets of inspiring encouragement prolonged to us.

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Compendium in Astronomy: A Volume Dedicated to Professor John Xanthakis on the Occasion of Completing Twenty-five Years of Scientific Activities as Fellow of the National Academy of Athens

Once we first approached a few colleagues allover the realm to sound them a few quantity devoted to Professor John Xanthakis at the celebration of finishing twenty-five years of medical actions as fellow of the nationwide Academy of Athens, any attainable doubts as to the feasibility of the venture have been quick dispelled by way of their hot and inspiring reaction.

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Additional resources for Compendium in Astronomy: A Volume Dedicated to Professor John Xanthakis on the Occasion of Completing Twenty-five Years of Scientific Activities as Fellow of the National Academy of Athens

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Astron. Astrophys. 14,215. : 1972, Monthly Notices Roy. Astron. Soc. 160,169. : 1961, Ann. Physics 12, 436. : 1979, Celes. , 19, 3. RADIATION PRESSURE EFFECT ON DUST SURROUNDING THE PLEIADES BRIGHT STARS P. Bouvier Geneva Observatory ABSTRACT The action of the radiation pressure from a B-star on a dust grain is reexamined in the celestial mechanics approximation of a two-body problem. The trajectories of the grains belonging to a dust cloud incident on a B-star build a one-parameter family of hyperbolae.

In. This change is an order of magnitude smaller than the change of the energy when an orbit is either trapped or untrapped. Table IV gives the maxima and minima of E. n~nas well as the range of values of 8 in each group. We see that (E f . ) decreases and . ln max (E . ) . lncreases from group to group. 00001. Table IV gives the smallest value of J l in each group. J l tends to be equal to J. with decreasing 8. The variation of adiabatic invariant becomes progF~ssively smaller with the increasing number of periods; its constancy is very well conserved when the number THE BEHAVIOUR OF ADIABATIC INVARIANTS NEAR RESONANCES 41 of periods is larger than eight.

Note (7) ] the bends. ASTRONOMICAL ACTIVITY IN THE PERIOD 1600 TO 1880 G. Teleki Astronomical Observatory Belgrade, Yugoslavia ABSTRACT Proceeding from the data presented in the Houzeau-Lancaster Bibliography (1882) the growth of the total sum of information in Astronomy from 1600 to 1880 is analysed and estimated that the time interval, within which the number of data is doubled, were about 25 years. It is inferred, taking thereby into account Teleki's (1980) analysis of the number of catalogues of star positions within the same interval, that the growth of the total sum of the information in Astronomy as a whole has been more rapid - by about a quarter - than that relating to the catalogues alone.

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