A constellation is a group of stars that forms a pattern in the sky. It sometimes looks like a mythological character or an animal if you have a good imagination. Cygnus, Lacerta, Triangulum, Cepheus, the Little Dipper, Lynx, Draco, Hercules, the Big Dipper, Scutum and Orion are some names of constellations.
A satellite is an object that goes around a planet or a star. Earth has a natural satellite -- the moon. Artificial satellites are launched into space for communications, astronomy, and weather studies.
Mechanical engineers, electrical engineers, and electronics engineers work together to assemble a rocket.
Scientists figure out what path the satellite will take when it is in space. The path was called orbit.
Four rocky inner planets -- Mercury, Venus, Earth, Mars -- and four gassy outer planets -- Jupiter, Saturn, Uranus, Neptune -- make up the eight major planets of our solar system. Pluto used to be the ninth planet but in 2006, International Astronomical Union (IAU) decided that Pluto was a dwarf planet.

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