Read the two passages.
Passage 1
Most of the planets in our solar system have moons. Our planet has only one, but some planets have several. For example, Jupiter has at least 53. Some planets, like Venus, have no moons. While other planets are somewhere in between. This table shows the number of moons that each planet has.

Planet Number of Moons
Mercury 0
Venus 0
Earth 1
Mars 2
Jupiter 53
Saturn 53
Uranus 27
Neptune 13

Passage 2

People have looked at the night sky throughout history. In fact, ancient sailors used the stars as a tool. For example, Polaris, or the North Star, has historically been a useful compass because it is always in the northern sky. At first, people used their eyes to study the stars. Eventually, telescopes were invented. One famous astronomer, Galileo Galilei, made a telescope that was similar to the ones we use today. He used it to prove that Earth revolved around the sun. Astronomers since have made many discoveries with more powerful telescopes.

Based on the information in Passage 1, what would be a good addition to Passage 2?
A definition for vocabulary words related to the solar system, like planet, moon, and star
A detail about recent astronomers' discoveries of different moons using the Hubble telescope
A photograph of different types of binoculars and telescopes people can use to view moons
A table showing astronomers' discoveries of different planets and moons throughout history