Astronomy Crossword Puzzles: Free Printable and Online

Gaze into the cosmos and uncover the secrets of stars, planets, and galaxies. Explore astronomical phenomena and the pioneers who mapped the universe.

Print any astronomy crossword below, download it as a PDF, or play it online. Free, and no signup is needed to play.

10 puzzles, click Print on any puzzle below

Space and planets

Easy · 5×5 · 4 words
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Printing for a class?

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Across

  1. 1. The state of matter that makes up the giant planets like Jupiter.
  2. 3. The second planet from the sun.

Down

  1. 2. The star at the center of our solar system.
  2. 4. The region of the atmosphere and outer space seen from the ground.

Astronomy

Easy · 7×7 · 7 words
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Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

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1
2
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6

Across

  1. 1. The physical universe beyond the Earth's atmosphere.
  2. 4. A small body of matter from outer space that enters the atmosphere and glows.
  3. 5. A completely empty area in the universe.
  4. 6. The star at the center of our solar system.

Down

  1. 2. A dwarf planet located in the Kuiper belt.
  2. 3. The curved path of a celestial object around a star or planet.
  3. 4. The fourth planet from the sun known as the Red Planet.

Astronomy

Easy · 5×5 · 4 words
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Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

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1
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3

Across

  1. 1. The United States agency responsible for the civilian space program
  2. 3. A luminous sphere of plasma held together by its own gravity

Down

  1. 2. The vast expanse beyond the atmosphere of Earth
  2. 3. The region of the atmosphere and outer space seen from the ground

Astronomy

Easy · 7×7 · 7 words
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Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

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1
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4
5
6

Across

  1. 1. The fourth planet from the sun known as the red planet
  2. 5. The blue gas giant furthest from the sun
  3. 6. The only planet known to support life

Down

  1. 1. The natural satellite that orbits the Earth
  2. 2. A ball of ice and dust with a long glowing tail
  3. 3. The vast area beyond the atmosphere of Earth
  4. 4. The star at the center of our solar system

aryrsj

Easy · 7×7 · 7 words
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Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

Make a class set →
1
2
3
4
5
6

Across

  1. 1. The fourth planet from the sun known as the Red Planet
  2. 5. The windy blue gas giant furthest from the sun
  3. 6. Matter that makes up giant planets like Jupiter

Down

  1. 1. The natural satellite that orbits the Earth
  2. 2. The vast empty region beyond Earths atmosphere
  3. 3. The star at the center of our solar system
  4. 4. The hottest planet in our solar system

aryrsj

Easy · 5×5 · 5 words
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Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

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1
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4
5

Across

  1. 4. Bright objects seen in the night sky
  2. 5. The space above the Earth

Down

  1. 1. Small particles found in space clouds
  2. 2. What giant planets like Jupiter are made of
  3. 3. The planet known as the Red Planet

aryrsj

Easy · 7×7 · 7 words
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Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

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1
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3
4
5
6

Across

  1. 1. Bright celestial bodies visible in the night sky
  2. 5. A vehicle used to launch people into space
  3. 6. Tiny particles of matter found in space clouds

Down

  1. 1. The vast void that exists beyond Earths atmosphere
  2. 2. The star at the center of our solar system
  3. 3. The third planet from the Sun and our home
  4. 4. The hottest planet in our solar system

Astronomy

Easy · 7×7 · 7 words
Play online →

Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

Make a class set →
1
2
3
4
5
6

Across

  1. 1. The famous dwarf planet at the edge of the system
  2. 5. The windy blue planet furthest from the sun
  3. 6. A streak of light caused by a falling space rock

Down

  1. 1. A large round object that circles a star
  2. 2. An icy object that develops a tail near the sun
  3. 3. The vast empty area beyond Earth's atmosphere
  4. 4. The star at the center of our solar system

Deep Space Discoveries

Medium · 11×11 · 14 words
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Printing for a class?

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Across

  1. 1. The closest celestial body of its kind to Earth
  2. 2. Nebular formation, or what vaporizes daily on the exoplanet WASP-94A b
  3. 5. Hypothetical life form from beyond our solar system
  4. 6. Acronym for NASA's exoplanet-hunting satellite launched in 2018
  5. 9. Essential instrument for observing distant cosmic phenomena
  6. 10. High-energy electromagnetic radiation emitted by some quasars
  7. 11. Prefix for an exoplanet that is more massive than Earth but lighter than Neptune
  8. 12. European space agency behind the Euclid telescope
  9. 13. The stretching of light to longer wavelengths as galaxies move away from us

Down

  1. 1. Luminous plasma sphere that might host its own system
  2. 3. Cosmic powder that obscures our view of forming planetary systems
  3. 4. The entirety of space, time, and their contents
  4. 7. A world found orbiting a star other than our sun
  5. 8. A 'mini' version of this blue ice giant is a common type of exoplanet

Astronomy

Easy · 7×7 · 7 words
Play online →

Printing for a class?

Print 2 or 4 versions of this puzzle with different grid layouts, so desk neighbors cannot copy answers. Same words and clues, and each version has its own answer key. Class sets are a Pro feature in the Grid Genius app.

Make a class set →
1
2
3
4
5
6

Across

  1. 1. The most famous dwarf planet in our solar system
  2. 5. The blue gas giant that is farthest from the sun
  3. 6. A piece of glass used in a telescope to see far away

Down

  1. 1. A large round object that circles a star
  2. 2. The vast empty area beyond Earths atmosphere
  3. 3. The star at the center of our solar system
  4. 4. The hottest planet in our solar system

Make your own Astronomy crossword

Turn your own word list into a crossword with the free Grid Genius maker. Print it with an answer key or share a playable link with your class. No account needed.

Make your own Astronomy crossword

Related Printable Crossword Topics

Astronomy Crossword FAQ

Is this Astronomy crossword puzzle free?

Yes. Every Astronomy crossword on this page is free. You can print it, download it as a PDF, or play it online without paying anything or creating an account.

Can I print the Astronomy crossword?

Yes. Click Print on any puzzle for a print-ready page with the grid, the clues, and a name and date line, or use Download to save it as a PDF, PNG, or JPEG for photocopying. The PDF download includes a filled answer key on the last page for grading.

Can students play these crosswords online?

Yes. Every puzzle has a Play online link that opens in the browser on any device. No app install and no signup is needed to play, which makes it easy to share with a class.

Can I make my own Astronomy crossword?

Yes. The free Grid Genius crossword maker builds a puzzle from your own words and clues, with a printable grid and answer key. The Grid Genius app can also generate a complete crossword from any topic you type.