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.

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10 puzzles, click Print on any puzzle below

Deep space astronomy

Medium · 15×15 · 22 words
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  1. 1. Category of compact galaxy that frequently orbits larger spiral systems
  2. 4. Gravitational distortion of spacetime geometry caused by massive bodies
  3. 6. Galactic morphology characterized by pinwheel-like stellar arms
  4. 8. Interstellar cloud of dust and gas where stars are born or die
  5. 10. Sudden stellar outburst that temporarily outshines its neighbors
  6. 13. Describing the vast physical space between individual star systems
  7. 15. Circular band of ionized gas seen in the constellation Lyra, cataloged as M57
  8. 16. Vast, empty expanse between cosmic web filaments
  9. 18. Flattened, rotating plane hosting the spiral arms of galaxies
  10. 19. NASA space observatory specialized in high-energy X-ray astronomy
  11. 20. Dense central hub of a globular cluster or galaxy

Down

  1. 2. Nearby southern galaxy cluster known for its bright central elliptical galaxy NGC 1399
  2. 3. Standard mass benchmark based on our home star used to weigh black holes
  3. 4. Infrared space telescope operating near the Earth-Sun L2 point
  4. 5. Cosmic phenomenon where massive clusters bend background light into arcs or rings
  5. 6. Theoretical point of infinite density at the center of a black hole
  6. 7. Gravitationally bound system containing hundreds or thousands of galaxies
  7. 9. Process where matter spirals onto a compact object, releasing gravitational energy
  8. 11. Nearest major spiral galaxy headed for an eventual merger with our own
  9. 12. Logarithmic measure of a celestial object's brightness
  10. 14. Astronomical unit of length equal to roughly 3.26 light-years
  11. 17. Microscopic solid grains that scatter ultraviolet light and obscure distant nebulae

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World Space Week

Medium · 11×11 · 16 words
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  1. 1. Extraterrestrial life form
  2. 3. The central star of our solar system
  3. 6. The universe seen as a well-ordered whole
  4. 8. A glowing sphere of plasma, like Sirius
  5. 12. When one celestial body obscures another
  6. 14. An icy body that releases gas or dust
  7. 15. The famous dwarf planet in the Kuiper belt
  8. 16. A massive system of stars, like the Milky Way

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  1. 2. The Roman goddess of the moon, or the moon itself
  2. 4. US agency behind the Artemis missions
  3. 5. Focused beam of light used in some satellite communications
  4. 7. Reaching this path is becoming cheaper thanks to reusable rockets
  5. 9. The vehicle at the center of the 2026 World Space Week "Revolution" theme
  6. 10. A giant cloud of dust and gas in the universe
  7. 11. The amount of gravity experienced in free fall
  8. 13. Earth's natural satellite

Astronomy

Easy · 5×5 · 5 words
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  1. 1. The United States government agency responsible for the civilian space program
  2. 2. The second planet from the sun
  3. 4. The natural satellite that orbits the Earth

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  1. 1. A star that suddenly increases in brightness
  2. 3. The star at the center of our solar system

Space and Astronomy

Easy · 11×11 · 14 words
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  1. 2. A circular band of dust and rock orbiting Saturn
  2. 5. Earth's natural satellite that lights up the night
  3. 7. The fourth planet from the sun known as the Red Planet
  4. 8. The scientific study of celestial bodies and the universe
  5. 12. A glowing ball of gas visible in the night sky
  6. 13. Relating to the moon
  7. 14. The star at the center of our solar system

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  1. 1. A star that suddenly increases greatly in brightness
  2. 3. The eighth and farthest known major planet from the sun
  3. 4. A vast system of billions of stars, gas, and dust
  4. 6. A person trained to travel in a spacecraft
  5. 9. The giant planet famous for its prominent ring system
  6. 10. A streak of light caused by a space rock burning in the atmosphere
  7. 11. The curved path of a celestial body around a star or planet

Astrophysics

Hard · 15×15 · 24 words
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  1. 1. Voracious monster at a galactic infant center outshining its entire host
  2. 3. Furious Greek letter headlining the most violent cosmic bursts known
  3. 6. Vast, underdense vacuum where cosmic filaments dare not tread
  4. 7. Cosmological principle property ensuring space looks uniform in all directions
  5. 9. Central stellar engine room under intolerable pressure
  6. 10. Galactic saintly ring of ancient globular clusters and dark matter
  7. 11. Boundary adjective marking the point of no return for horizon crossers
  8. 15. Explosive finale forging gold and iron across the cosmos
  9. 17. Angular momentum quality giving black holes their Kerr personality
  10. 18. Sudden white dwarf flare-up that seems brand new
  11. 19. Relating to the monarch running our local system
  12. 20. Hot plasma celebrity that loves to twinkle
  13. 21. Perpetual freefall that constantly misses the ground
  14. 22. Compact stellar elder that has finished its main-sequence youth
  15. 23. Solitary yellow dwarf running our neighborhood show

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  1. 2. The loneliest, most distant orbital moment from Earth
  2. 4. Incandescent streak when an intruder burns in planetary air
  3. 5. Universal speed governor that refuses to travel slower in vacuum
  4. 8. Massless parcel of light braving a million-year crawl from a star core
  5. 12. Cosmic Hubble stretching driving galactic clusters ever farther apart
  6. 13. Faster-than-light growth spurt that flattened the baby universe
  7. 14. Neutron star sporting trillions of Gauss capable of wiping credit cards from afar
  8. 15. Describing a point where density shoots to infinity and equations give up
  9. 16. The boundless canvas woven together with time

Constellations

Medium · 11×11 · 14 words
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  1. 3. The sea monster sent to devour Andromeda
  2. 5. The ram with the golden fleece
  3. 6. Southern constellation representing the bird of paradise
  4. 11. The boastful queen forming a distinctive W in the northern sky
  5. 12. Zodiac twins represented by Castor and Pollux
  6. 13. First word in the names of the celestial Major and Minor bears
  7. 14. The crane, a southern constellation

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  1. 1. Nemean beast of the zodiac
  2. 2. The poop deck of the giant ship Argo Navis
  3. 4. Half-man, half-horse constellation of the southern sky
  4. 7. The scorpion that killed Orion
  5. 8. The crab sent to distract Hercules
  6. 9. The hero holding the head of Medusa
  7. 10. Zodiac bull containing the Pleiades cluster

Astronomy

Easy · 5×5 · 5 words
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  1. 1. Relating to the Sun.
  2. 2. The imaginary line around which a planet rotates.
  3. 4. The Latin name for the Moon.

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  1. 1. A luminous sphere of plasma held together by its own gravity.
  2. 3. The star at the center of our solar system.

space related. all space missions. planet and moon characters/ names. famous astronomers. basically like general knowledge on steroidI want to learn aswell. make it challenging but not too ambitious.

Hard · 15×15 · 25 words
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  1. 3. A sudden stellar brightness from a white dwarf
  2. 4. A silver ball that started the race in 1957
  3. 7. An extremely bright heart of a distant galaxy
  4. 8. A cosmic lighthouse spinning at incredible speeds
  5. 9. A massive city of stars bound by gravity
  6. 10. The Pole who stopped the sun and moved the earth
  7. 13. A celestial lion containing a Regulus heart
  8. 16. A cracked ice world with a hidden ocean
  9. 17. A falling star that burns in the air
  10. 18. A pale blue dot enthusiast who spoke of billions
  11. 19. The agency that put boots on the lunar dust

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  1. 1. The G-type star that keeps us grounded
  2. 2. A peaceful station that fell into the Pacific
  3. 3. A nursery of stars made of gas and dust
  4. 4. A Russian union that remains a reliable taxi to the stars
  5. 5. A war god seeing red in the night sky
  6. 6. A periodic visitor who returns every seventy-six years
  7. 9. A cupbearer larger than the swiftest planet
  8. 10. The universe seen as a well-ordered whole
  9. 11. A bowl-shaped scar from a space impact
  10. 12. A ringed titan that would float in a giant bathtub
  11. 13. A small harp constellation with a bright Vega
  12. 14. Saturns moon that wears a thick orange shroud
  13. 15. The smaller dread circling a war god

space related. like habitat planets. space missions, periodic table ect

Easy · 5×5 · 5 words
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  1. 1. A noble gas element often used in glowing signs.
  2. 3. Relating to the Sun and the energy it provides.
  3. 4. The natural satellite that orbits the Earth.

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  1. 1. The United States government agency responsible for space exploration.
  2. 2. A common metallic element found in the core of many planets.

Space and Astronomy

Easy · 11×11 · 15 words
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  1. 2. When one heavenly body blocks the light of another
  2. 6. A massive system of stars held together by gravity
  3. 8. A fictional being from another planet
  4. 9. The largest planet in our solar system
  5. 12. Relating to the sun
  6. 13. The vast empty area beyond Earths atmosphere
  7. 14. A giant cloud of dust and gas in space

Down

  1. 1. Relating to the moon
  2. 3. The very center of a star or planet
  3. 4. A large round object that circles a star
  4. 5. The region above the earth where clouds and stars appear
  5. 7. A person trained to travel in a spacecraft
  6. 10. The tilted ice giant planet
  7. 11. A frozen ball of ice and dust with a glowing tail
  8. 12. The star at the center of our solar system
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