Celestial objects~natural objects that are in space.
Planets,stars,and moons are some celestrial objects
Solar System~the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
We live in the solar system
Sun~the star which the earth orbits.
The sun is the earth's main light source.
Planet~a creationist moving in an elliptical orbit around a star.
There are 8 planets.
Terrestrial~of,on,or relating to earth
E.T is extra terrestrial.
Asteroid~a small rocky body orbiting the sun.
The asteroid is very hard.
Meteoroid~a small body moving in the solar system that would become a meteor if it entered the earth 's atmosphere.
Meteoroid scare me.
Meteorites~a meteor that survives its passage through the earth 's atmosphere such that part of it strikes the ground.
Meteorites are pretty in the sky.
Moon~the natural satellite of earth,visible by reflected light from the sun.
Sometimes there is a blue moon.
Comet~a celestrial object consisting of a nucleus of ice & dust & when near the sun,a tail of gas & dust particles pointing away from the sun.
Comets are very cool.
Gravity~the force that attracts a body toward the center of earth,or toward any other physical body having mass.
There's no gravity in outer space.
Newton's law of universal gravity~the law proposed by Sir Isaac Newton that expresses the force of gravitational attraction between 2 bodies as a function
Newton's law of universal gravity is smart.
Space Exploration~the ongoing discovery and exploration of celestrial structures in outer space by means of continuous evolving & growing space technology.
Space Exploration is important.
Rocket~a cylindrical projectile that can be propelled to a great height or distance by the combustion of its contents, used typically as a firework or signal.
The kids are in a rocket.
Rover~a machine that wanders around space
The Rover went on the planet.
NASA~National Aeronautics & Space Administration
NASA is really cool.
System~a group of celestrial objects connected by their mutual attractive forces,especially moving in orbits about a center.
The solar system is an example of a system.
Orbital Path~the place at which when a space craft reaches a free fall and then adds a thrust to propel the space craft.
Orbital Path is one of ourvocabulary words.
Star~a fixed luminous point in the night sky that is large.
The sun is a star.
Inner planet~a planet whose orbit lies within the asteroid belt.
Mercury,Mars,Earth,and Venus are the inner planets.
Outer Planet-a planet that lies out of the the asteroid belt
Jupiter,Saturn,Uranus,and Neptune are the outer planets.
Asteroid Belt~the region in the solar system between the orbits of Mars & Jupiter, in which most of the asteroids orbit.
The asteroid belt is very important.
Meteor~a small body of matter from outer space that enters the earth 's atmosphere becoming incandescent as a result of friction & appearing as a streak of light.
Meteors are beautiful in the night sky.
Satellite~an artificial body placed in orbit around the earth or moon or another planet in order to collect information or for communication.
Satellites collect information.
Galilean moons~the 4 largest moons of Jupiter.
Io,Europa,Ganymede,& Callisto are the Galilean moons
Coma~a diffuse cloud of gas & dust surrounding the nuclear of a comet
A coma is part of a comet.
Gravitational attraction~a natural phenomenon by which all physical bodies attract each other.
Gravitational attraction attracts us.
Mass~a coherent typically large body of matter with no decimate shape.
Mass and weight aren't the same thing.
Telescope~an optical instrument designed to make distant objects appear bigger.
I saw Jupiter through my telescope.
Observatory~a room or building housing on astronomical telescope or other scientific equipment.
The telescope is in the observatory.
International Space Station~a space station that is an artificial satellite
The International Space station is in space.
Galileo Galilei~Itailian astronomer and physicist.
Galileo Galileo invented the telescope and the names of Jupiter's moons.
Astronaut~a person who is trained to travel in spacecraft.
I am an astronaut.