Give every planet a defining fact
Use a simple anchor, such as Jupiter’s size or Mars’s red appearance. Distinctive traits help you choose between names you already recognize.
Science / Topic guideSpace trivia.
Space trivia.
Put your knowledge to work.
Space trivia brings the Solar System, stars, and exploration into the same arena. A strong start is knowing what makes each planet distinctive. From there, connect those facts to the objects around them: moons, asteroids, comets, and the star at the center of our system.
A quick warm-up
Three questions. How many do you know?
Think of your answer, then open each explanation. These practice examples introduce the subject; in-app questions can vary.
01Which is the largest planet in our Solar System?+
Jupiter
Jupiter is the largest planet in the Solar System. The Sun is larger, but it is a star rather than a planet.
02Which planet is often called the Red Planet?+
Mars
Iron-rich minerals on the surface give Mars its recognizable reddish appearance.
03What is the star at the center of our Solar System?+
The Sun
The planets orbit the Sun. Our Solar System is part of the Milky Way galaxy.
Build your knowledge
A smarter way to practice.
Read the comparison carefully
Largest, nearest, hottest, and brightest ask different things. Identify exactly what is being compared before you commit to an answer.
Keep exploring