... VEGA spacecraft exploring the comet is shown on stamps of Central African Republic, Republic of Congo, Malagasy Republic, Mongolia and de Luxe sheet of Djibouti. ...
... The solar wind does move ion tails in comets, not by colliding with them but by the ... were quickly ionized by sunlight, creating an "artificial comet" of barium ions ...
... Comets are believed to be remnants of the formation of the solar system; some of them (like Halley's comet) are diverted by the attraction of planets into orbits of relatively short periods around the Sun. ...
... At the end of 1983, however, the magnetospheric probe ISEE-3 (International Sun-Earth Explorer 3) pulled away from Earth towards comet Giacobini-Zinner, and some time later was sufficiently far from Earth to intercept such CMEs. ...
... If a comet rich in water were to hit the moon (as may happen--a small comet may have hit Siberia in 1908), the Moon would have a watery atmosphere for a thousand or maybe a million years, but it won't last. ...
... Planetary line-up and the sunspot cycle . What are comet tails made of? . If light speed sets the limit, why fly into space? ... This lets an astronomer state that a nova, or a comet, appeared in (say) Aries, or assign some distant galaxy to the ...
... What are comet tails made of? . If light speed sets the limit, why fly into space? ... like that apparently happened to Comet Shoemaker Levy, whose fragment crashed onto ...