4th Grade- Solar System

round

Name of the first mission in which people landed on the surface of the moon

large collection of asteroids located between Mars and Jupiter

cloud of evaporated dust and gas that surrounds the comet nucleus

chunk of rock which orbits the sun in an elliptical path

a measure of distance equal to 93 million miles

small asteroid

visible stream of vaporized dust, ice, and gas that extends out from the comet

spacecraft sent from Earth to space to take pictures and gather data

an object that orbits another object in space

meteor that has crashed into the Earth

the parts of the moon that are visible from the Earth

mass of ice and dust that orbits the sun

events in which the ocean water rises and falls due to gravitational forces of the sun and moon

the movement of one space object around another

meteoroid that has entered the Earth's atmosphere

oval-shaped

imaginary slanted line that runs through the center of the planet from pole to pole

one full spin of  a planet on its axis