The Solar System
What planet is closest to the Sun?
Mercury
What is the Big Bang Theory?
The idea that the universe began from a small, hot point and expanded.
Who said the Sun is at the center of the solar system?
Nicolaus Copernicus
What spacecraft carried astronauts to the Moon?
Apollo 11
What does the root “astro–” mean?
Star
What planet is known as the Red Planet?
Mars
What word means growing larger, like the universe?
Expanding
Who was the first African American woman in space?
Mae Jemison
What planet was reclassified as a dwarf planet?
Pluto
What does the root “geo–” mean?
Earth
What is the largest planet in our solar system?
Jupiter
What tool helps scientists study galaxies?
Telescope
What does “heliocentric” mean?
Sun-centered
What does NASA stand for?
National Aeronautics and Space
What does the root “helio–” mean?
Sun
What planet has beautiful rings?
Saturn
What do scientists use to test their ideas?
Evidence
What does “geocentric” mean?
Earth-centered
What is a person who travels into space called?
Astronaut
What does the suffix “–naut” mean?
Traveler
What force keeps the planets in orbit around the Sun?
Gravity
What is a galaxy made of?
Billions of stars, gas, and dust
What tool did Galileo use to observe the sky?
Telescope
What word means a special task or journey in space?
Mission
What saying means a great achievement?
A feather in your cap