Meet the universe

2. large objects that orbit a star but it must be large enough to have enough gravity to force it to a spherical shape and it must be large enough that its gravity has cleared a path of it own
3. a icy rock that gives off gas and dust that forms a tail when close to the sun
5. energy the mysterious background energy that scientists say is causing universe to expand
6. matter an invisible form of matter that does not interact with light or other electromagnetic radiation but exerts gravity force
8. very old objects that give off large amounts of energy located at the edge of the universe
9. universe all matter, including earth, galaxies and intergalactic space
10. ball of shining gas and plasma, mostly made of hydrogen and helium and held together by its own gravity
11. a object that orbits the sun but its not able to clear a full path for its orbit
12. planets smaller than a planet, orbits the sun but its not able to clear a path for its orbit

1. an astronomical object with huge density and gravitational pull so strong that nothing, even light cannot escape it
4. a huge collection of gas, dust and billions of stars and their solar systems held together by gravity
7. ssmall rocks that float around comets