The Ultimate Astronomy Quiz
by Staff
Though the astronomy field has evolved from its primitive beginnings, there's still a boundless cosmos to explore. Test your astronomy knowledge with our quiz.

How many constellations are officially recognized?

  • 12
  • 88
  • over a million

What term do astronomers use to describe the two times a year when day and night are of equal length?

  • solstice
  • blue moon
  • equinox

What term describes the effect where stars appear to move as the Earth moves?

  • parallax
  • Polaris
  • scintillation

Which planet has the largest moon in the solar system?

  • Earth
  • Uranus
  • Jupiter

The sun is a star.

  • TRUE

Can a comet create a crater on the surface of the Earth?

  • yes
  • no
  • only during a full moon

What space objects can create craters on the surface of the Earth?

  • asteroids
  • meteorites
  • meteors

What does a light-year measure?

  • brightness
  • time
  • distance

Which of the following best describes a supernova?

  • a fast-moving meteor
  • a pair of conjoined stars
  • a bright explosion

Pluto is one of the nine planets.

  • TRUE

Which of the following best describes our solar system?

  • geocentric
  • heliocentric

Who discovered that the planets travel in an ellipse, rather than a circle?

  • Edwin Hubble
  • Isaac Newton
  • Johannes Kepler

What is the name of the North Star?

  • Vega
  • Parallax
  • Polaris

The red spot on Jupiter is larger than the Earth.

  • TRUE

What is the scientific term behind why the stars twinkle?

  • parallax
  • albedo
  • scintillation

Saturn is the only planet with rings.

  • TRUE

Which of the following planets is NOT considered one of the gas giants?

  • Mars
  • Jupiter
  • Saturn

How much of the Milky Way is visible?

  • less than 5 percent
  • around 50 percent
  • more than 90 percent

What is at the center of the Milky Way galaxy?

  • a black hole
  • the sun
  • the planet Earth

What are the moons of Uranus named after?

  • Roman and Greek gods
  • characters from Shakespeare
  • the people who discovered them

What is the name of the nearest galaxy to Earth?

  • Polaris
  • Vega
  • Andromeda

How many stars are in the Milky Way?

  • around a billion
  • 100 billion
  • more than 200 billion

On what planet will you find the largest volcano in the solar system?

  • Mars
  • Earth
  • Neptune

Which planet has the most moons?

  • Venus
  • Mercury
  • Jupiter

What are the rings around Saturn mostly made from?

  • ice
  • silicon
  • helium

How often does Halley's Comet come around?

  • every 25 years
  • every 75 years
  • every 150 years

What is a nebula?

  • a crashed comet
  • a cloud of space dust
  • a burned out star

Does the Earth rotate or revolve?

  • rotate only
  • revolve only
  • both

What term describes two full moons in the same calendar month?

  • full moon
  • blue moon
  • double moon

NASA maintains a SETI division to search for life on other planets.

  • TRUE