Astrophysics Crossword Puzzle

Download and print this Astrophysics crossword puzzle. Use a pencil or pen to complete the puzzle by filling in the blanks. The completed answers are included, so you can easily check your progress.

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Red Giant : a star that has expanded and cooled, resulting in it becoming much larger and cooler than it was before it expanded
Star : A large ball of mostly hydrogen and helium that gives out light
Fastest : the orbital speed of a comet is _____________ when it is closest to the sun
Dark Matter : hypothesized type of mass that cannot be observed by current methods. It is used to explain why some galaxies rotate faster than they should for their observed mass.
Main Sequence : the life stage of a star during which it radiates energy because of fusion of hydrogen nuclei in its core
Protostar : The first stage all stars go through after forming from a nebula. In this stage the star becomes hot enough for hydrogen nuclei to fuse.
Natural Satellites : The moons that orbit planets.
Neutron Star : the highly compressed core of a massive star that remains after a supernova
Black Dwarf : a star that has faded out and gone cold
Red-shift : increase in the wavelength of electromagnetic waves emitted by a star or galaxy due to its motion away from us.
Red Supergiant : a star much more massive than the Sun will swell out after the main sequence stage to become this before it collapses
Dark Energy : A hypothesised form of energy, believed to be responsible for the universe’s ever increasing rate of expansion.
Supernova : The explosion of a massive star, that d
Day : time for a planet to complete one whole rotation around its axis
Galaxy : a large group of stars orbiting a black hole
Milky Way : The galaxy in which our solar system is located.
Centripetal Force : the resultant force towards the centre of a circle acting on an object moving in a circular path
Black Hole : an object in space that has so much mass that nothing, not even light, can escape from its gravitational field
Asteroid : small rock that orbits the sun
Ice : Comets are made of rock and _____________
Artificial Satellites : Man-made objects that have been sent into space and which are in orbit around the earth
Elliptical : comets orbit the sun in highly ______________ paths
Big Bang : the theory that the universe was created in a massive explosion, and that the universe has been expanding ever since
Nebula : A Massive cloud of gas and dust

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QUESTIONS LIST:

red giant : a star that has expanded and cooled, resulting in it becoming much larger and cooler than it was before it expanded
star : a large ball of mostly hydrogen and helium that gives out light
fastest : the orbital speed of a comet is _ when it is closest to the sun
dark matter : hypothesized type of mass that cannot be observed by current methods. it is used to explain why some galaxies rotate faster than they should for their observed mass.
main sequence : the life stage of a star during which it radiates energy because of fusion of hydrogen nuclei in its core
protostar : the first stage all stars go through after forming from a nebula. in this stage the star becomes hot enough for hydrogen nuclei to fuse.
natural satellites : the moons that orbit planets.
neutron star : the highly compressed core of a massive star that remains after a supernova
black dwarf : a star that has faded out and gone cold
red-shift : increase in the wavelength of electromagnetic waves emitted by a star or galaxy due to its motion away from us.
red supergiant : a star much more massive than the sun will swell out after the main sequence stage to become this before it collapses
dark energy : a hypothesised form of energy, believed to be responsible for the universe’s ever increasing rate of expansion.
supernova : the explosion of a massive star, that d
day : time for a planet to complete one whole rotation around its axis
galaxy : a large group of stars orbiting a black hole
milky way : the galaxy in which our solar system is located.
centripetal force : the resultant force towards the centre of a circle acting on an object moving in a circular path
black hole : an object in space that has so much mass that nothing, not even light, can escape from its gravitational field
asteroid : small rock that orbits the sun
ice : comets are made of rock and _
artificial satellites : man-made objects that have been sent into space and which are in orbit around the earth
elliptical : comets orbit the sun in highly _ paths
big bang : the theory that the universe was created in a massive explosion, and that the universe has been expanding ever since
nebula : a massive cloud of gas and dust