Pluto disqualified due to its eccentric orbit that crosses with Neptune. In addition to the fact that it is disproportionately smaller than any of its former counterparts in the solar system, it does not qualify as a planet. Otherwise, we might as well qualify Plutos moon, Charon as a planet, thus making Pluto and Charon a binary planet system.

　　1. If we are to travel from one end of the galaxy circle to the other at the speed of light, it would take us fifty thousand light years.

　　2. There can not possibly be any form of water in Mercury.

　　3. Venus is sharing with the earth similar diameter, similar gravity and similar rotation.

　　4. The speed with which Mars travels round the Sun is twice as fast as that of the earth.

　　5. Jupiter has an atmosphere, which, unlike that of earth, contains for the most part _____________.

　　6. Despite the quick rotation of Jupiter, its clouds are still clinging to the planet with the help of __________________.

　　7. between the inner ring and the outer ring of Saturn there is a ___________________.

　　8. Compared with that of the earth, the gravity force on the surface of Uranus is _____________.

　　9. According to the International Astronomical Union, Pluto is no longer seen as a planet; instead, it should be termed as ________________.

　　10. Its eccentric orbit and its _____________ disqualified Pluto as a planet.

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