LYNETTE COOK / SCIENCE PHOTO LIBRARY LYNETTE COOK / SCIENCE PHOTO LIBRARY
Not for use in popular astronomy and related books for adults.
Extrasolar planets orbiting HR 4796A. Artwork of two hypothetical extrasolar planets (lower right, and left of middle) orbiting the star HR 4796A (far left). Between the two planet lies a dust ring that is 120 billion kilometres across. The gravitational forces of the two planets create a 'shepherding effect' confining the dust ring to a specific area. HR 4796A is several times more massive than the Sun. It lies 320 light years away in the constellation Libra.
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