Astronomy

Across 1. Any celestial body orbiting around a planet or star 3.  the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed 4. A star that is smaller than a planet and has a mass equivalent to less than one-tenth of the Suns mass 5. The natural satellite of the Earth 6. The second smallest planet and the farthest known from the sun; has the most elliptical orbit of all the planets 8. A typical star that is the source of light and heat for the planets in the solar system 10. A giant planet with a ring of ice particles; the 8th planet from the sun 11. The 3rd planet from the sun 12. The smallest planet and the nearest to the sun 14. Astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extra-terrestrial sources 15. An intense short burst of gamma

radiation from unknown astronomical sources, occurring several times a year Down 2. The 4th largest of Jupiter's satellites; covered with a smooth shell of frozen water 3. A relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit 7. The largest of Jupiter's satellites 8. Having an orbit farther from the sun than the Earth's orbit 9. The 4th planet from the sun 11. The precise date that is the point of reference for which information 13. The second nearest planet to the sun

Astronomy

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