Mercury, Venus, Earth, Mars. Terrestrial, rocky : 11
The spinning of a planet on its axis, causing day and night :9
A force of attraction that keeps planets orbiting the sun : 7
A group of objects that orbit a star : 8
The orbit of a planet around the sun. On Earth, one year : 10
The idea of that the Earth and planets orbit the sun. A sun-centered view : 6
A rock that has entered Earth's atmosphere, leaving a streak of light in the night sky : 13
Jupiter, Saturn, Uranus, Neptune. Gas giants : 12
The theory the universe came forth from a single spot in an enormous explosion: 1
Huge clusters of stars, gas, and dust bound by the force of gravity: 8
What is Galaxy?
The group of many stars along with interstellar gases, rocks and dust material.
Thus, the numbers are added in front of the sentences.
Learn more about galaxy.
https://brainly.com/question/24836631
#SPJ1