Do you know how many planets has a Solar System:
a) 10
b) 9
c) 8
d)7

Since August 2006 the only correct answer is c) 8 !

http://www.scienceblog.com/cms/solar-syste...nets-11368.html
http://news.bbc.co.uk/2/hi/5282440.stm

since August 2006 isn´t Pluto considered as a planet but as a dwarf planet.
The definition of planet is now:
The scientists agreed that for a celestial body to qualify as a planet:

it must be in orbit around the Sun
it must be large enough that it takes on a nearly round shape
it has cleared its orbit of other objects

Interesting , isn´t it?





Another question...
What´s the largest planet of our Solar Sytem:
a) Saturn
b) Europa
c) Jupiter
d) Uranus


the only correct answer is c)
if you need to check - go to e.g. http://www.enchantedlearning.com/subjects/...ter/index.shtml

interesting!!...thank you Luca...