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SPACE and COSMOS

Animal World Crossword - Unscramble and Solve
Across
First man made satellite in space
A Russian astronaut
One who studies the night sky and stars and planets
Wandering heavenly bodies that are dirty balls of snow and ice and develop a tail as come near to the sun
One of the moons of Mars
a celestial object, thought to be a rapidly rotating neutron star, that emits regular pulses of radio waves
a piece of rock or metal that has fallen to the earth's surface from outer space as a meteor.
A large collection of planets and stars
Down
A planet that was reclassified as a planetoid
A planet that rolls on its equator
a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
A point in space with gravity strong enough to suck in even light
a hypothetical connection between widely separated regions of space–time.
Largest planet in the solar system
A planet that goes around the sun in 88 days