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

Easy · 7×7 · 7 words
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Across

  1. 3. A large round object that circles a star
  2. 4. Another name for the entire universe
  3. 7. Relating to the moon

Down

  1. 1. The vast area beyond the atmosphere
  2. 2. The fourth planet known as the Red Planet
  3. 5. The natural satellite that orbits the Earth
  4. 6. A glowing ball of gas in the night sky

Space and Astronomy

Easy · 11×11 · 14 words
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Across

  1. 1. A reusable spacecraft designed for transport
  2. 4. A large round object that travels around a star
  3. 7. The force that pulls objects toward each other
  4. 9. A ball of ice and dust that leaves a long tail
  5. 11. The path one object takes around another in space
  6. 13. The largest planet in our solar system

Down

  1. 1. The vast empty area beyond the Earth atmosphere
  2. 2. All of space and everything in it
  3. 3. A creature from another planet
  4. 5. A small rocky body orbiting the sun
  5. 6. A vehicle used to launch people or satellites into space
  6. 8. The gas giant famous for its visible rings
  7. 10. The fourth planet from the sun often called the Red Planet
  8. 12. The star at the center of our solar system

Astronomy

Easy · 7×7 · 7 words
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Across

  1. 1. What travels from stars to reach our eyes
  2. 5. A large round object that circles a star
  3. 7. The natural satellite that orbits the Earth

Down

  1. 2. A massive system of stars and gas clouds
  2. 3. A tool used to see distant objects in space
  3. 4. The vast area beyond Earths atmosphere
  4. 6. The star at the center of our solar system

Astronomy

Easy · 7×7 · 6 words
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Across

  1. 1. The star at the center of our solar system
  2. 4. A vehicle used to travel into outer space
  3. 5. The fourth planet from the sun known as the red planet

Down

  1. 1. The vast area beyond the atmosphere of the earth
  2. 2. The world on which we live
  3. 3. The planet famous for its bright rings

Astronomy

Easy · 7×7 · 8 words
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Across

  1. 1. The central star of our solar system
  2. 4. The regular path one object takes around another in space
  3. 5. The planet inhabited by humans
  4. 7. The natural satellite that orbits the Earth

Down

  1. 1. The region above us where clouds and stars are seen
  2. 2. A star that suddenly increases in brightness
  3. 3. The visible energy that travels from the stars
  4. 6. A flat and circular band of debris around a planet

Astronomy

Hard · 11×11 · 14 words
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Across

  1. 4. A planet's personal brightness rating, not to be confused with libido
  2. 5. A dying star's dramatic, temporary glow-up
  3. 6. When the sun, earth, and moon line up to win at Scrabble
  4. 7. Optical illusion making close stars seem to dance
  5. 10. Gravity's inescapable groove
  6. 11. Cloudy boundary where long-period comets are born
  7. 12. The horizon of no return

Down

  1. 1. The exact opposite of a peak astronomical experience
  2. 2. Atmospheric gatecrasher that burns up upon entry
  3. 3. Subatomic noble holding the universe's mass
  4. 6. Summer's longest party or winter's shortest gathering
  5. 7. Weightless messenger carrying all the universe's news
  6. 8. When a satellite is feeling most distant and aloof
  7. 9. Halley's famous tail-wagger

Astronomy

Easy · 11×11 · 15 words
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Across

  1. 1. The vast empty vacuum beyond our atmosphere.
  2. 5. The circular belt of constellations in the night sky.
  3. 6. A person trained and equipped to travel among the stars.
  4. 9. The invisible pull that keeps planets circling the sun.
  5. 12. Another term for the entire known universe.
  6. 14. An icy space object that develops a long glowing tail.

Down

  1. 1. The bright star at the center of our solar system.
  2. 2. A large bowl-shaped dent left by an asteroid impact.
  3. 3. Earth's largest natural satellite that shines at night.
  4. 4. The only known planet to support life.
  5. 7. A large rocky body floating freely between Mars and Jupiter.
  6. 8. A powerful vehicle built to travel beyond the atmosphere.
  7. 10. The famous space mission program that reached the moon.
  8. 11. A group of planets orbiting a central star.
  9. 13. A glowing ball of hot gas in the night sky.

Astronomy

Medium · 11×11 · 14 words
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Across

  1. 1. Unit of length used to measure large distances
  2. 4. Luminous sphere of plasma
  3. 6. Gas giant famous for its prominent rings
  4. 7. Time when day and night are of equal length
  5. 10. A shooting star
  6. 11. Point directly below the observer
  7. 12. Famous dwarf planet in the Kuiper belt

Down

  1. 2. Time when the Sun reaches its highest or lowest point
  2. 3. Ice giant that rotates on its side
  3. 4. The star at the center of our system
  4. 5. Rocky remnant from the early solar system
  5. 8. Earth's natural satellite
  6. 9. Path of a celestial body
  7. 10. The Red Planet

Astronomy

Hard · 11×11 · 13 words
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Across

  1. 1. Twice a year when the cosmic scales are balanced
  2. 4. A stellar explosion that sounds like a PBS science show
  3. 5. A wanderer that has cleared its own path
  4. 8. The invisible glue holding the universe together
  5. 10. An eternal state of falling and missing the ground
  6. 11. When the moon is playing hard to get
  7. 12. Saturnian moon with a mythological, giant name
  8. 13. The heavy matter that makes up you, me, and the stars

Down

  1. 2. Ancient, brilliant core far across the universe
  2. 3. A particle of light that never rests
  3. 6. Rocky space potato orbiting the sun
  4. 7. The darkest shade of pale, or rather, total dark
  5. 9. How much a world reflects on things

Astronomy

Medium · 11×11 · 14 words
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Across

  1. 1. Andromeda is the closest spiral example to our own Milky Way.
  2. 4. A sudden, spectacular brightening of a white dwarf.
  3. 7. The first planetary body discovered with the aid of a telescope, notable for its tilted axis.
  4. 8. Galileo famously improved this instrument to observe the moons of Jupiter.
  5. 10. To travel around a larger celestial body in a curved path.
  6. 11. The brightest natural object in Earth's night sky after the moon.
  7. 13. Commonly referred to as a shooting star as it burns through the atmosphere.

Down

  1. 1. The universal attraction shaping the large-scale structure of the universe.
  2. 2. It controls the tides and has phases ranging from waxing to waning.
  3. 3. Rovers like Curiosity and Perseverance currently explore this rusty terrain.
  4. 5. A highly magnetized rotating neutron star emitting beams of electromagnetic radiation.
  5. 6. The moment marking the longest or shortest days of the year.
  6. 9. An object massive enough to be rounded by its own gravity but lacking thermonuclear fusion.
  7. 12. The central anchor of our local cosmic neighborhood.
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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.

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