Science Source Feb 2010
EN_90286391_0277
![Science Source Feb 2010](img/medium/arch1/dvd0114/19/EN_90286391_0277.jpg)
Optical photograph of comet Giacobini-Zimmer taken on October 26, 1959. The comet was discovered in 1900 by M. Giacobini in France and independently rediscovered by E. Zinner in Germany in 1913. It has an orbital period of 6.5 years. A comet's nucleus is composed of ice and dust. As it nears the Sun some of the ice evaporates as its surface is heated. This gas becomes ionized and is drawn outwards by the solar wind to form a tail which points away from the Sun. The released dust may also form a second tail as it is pushed by radiation pressure.
2010-02-13
EAST NEWS
Science Source
NASA/Science Source
6t9483
1,07MB
25cm x 19cm przy 300dpi
1900, 1913, 1959, 21P, 26, ALSO, AN, AND, AS, ASTRONOMY, AWAY, BARNARD, BECOMES, BRUCE, BY, COMET, COMPOSED, DISCOVERED, DRAWN, DUST, EVAPORATES, FORM, FRANCE, FROM, GAS, GERMANY, GIACOBINI, GIACOBINI-ZIMMER, GIACOBINI-ZINNER, HAS, HEATED, ICE, IMAGERY, IN, INDEPENDENTLY, IONIZED, IS, IT, ITS, MAY, NASA, NEARS, NUCLEUS, OCTOBER, OF, ON, OPTICAL, ORBITAL, OUTWARDS, PERIOD, PERIODIC, PHOTOGRAPH, POINTS, PRESSURE, PUSHED, RADIATION, REDISCOVERED, RELEASED, SCIENCE, SECOND, SOLAR, SOME, SOURCE, SUN, SURFACE, TAIL, TAKEN, THE, THIS, TO, WAS, WHICH, WIND, YEARS, ZINNER, ZINNER-GIACOBINI,