Comet Arend-Roland
Comet Arend-Roland. This comet was discovered on 8 November 1956 by Belgian astronomers Sylvain Arend and Georges Roland (at the Royal Observatory of Belgium). The comet reached perihelion (closest approach to the Sun) on 8 April 1957. It is also known as C/1956 R1 (Arend-Roland), Arend-Roland 1956h, and 1957 III. Comets are bodies of ice and dust that enter the inner solar system from the outer solar system. As they approach the Sun, the heat boils the ice, producing a coma around the nucleus, along with a tail stretching out behind it. The direction of the tail indicates the direction of the Sun.
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Photo credit: © DETLEV VAN RAVENSWAAY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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