Space, The Universe, and Everything Crossword Puzzle

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Accretion : _______ disk - Diffuse material orbiting around a central body such as a protostar, a young star, a neutron star or a black hole. 
Mass : A measure of the amount of matter in a body.
Molecule : A collection of atoms glued together by electromagnetic forces.
Matter : Anything that has both mass and volume (i.e. takes up space).
Dark Matter : Matter that gives out no light and does not interact with the electromagnetic force, but whose presence can be inferred from gravitational effects on visible matter.
Inertia : The natural tendency of objects to resist changes in their state of motion.
Gravity : The force of attraction that exists between any two masses, whether they be stars, microscopic particles or any other bodies with mass.
CMBR : Anagram for Cosmic Microwave Background Radiation, which is the “afterglow” of the Big Bang, a microwave radiation which still uniformly permeates all of space at a temperature of around -270°Ck.
Event Horizon : A one-way boundary in space-time surrounding a black hole. Any matter or light that falls through it can never leave, and any event inside it cannot affect an outside observer.
Magnetic : _______ Field - The field of force that surrounds a magnet.
Electron : A negatively-charged sub-atomic particle. It is an indivisible, elementary particle, and is usually to be found orbiting the nucleus of an atom.
Photon : A particle of light or other electromagnetic radiation, which has no intrinsic mass and can therefore travel at the speed of light.
Big Bang : The huge “explosion” 13.7 billion years ago in which the universe is thought to have been created.
Light Year : A convenient unit for measuring the large distances in the universe.
Black Hole : The warped space-time remaining after the gravity of a massive body has caused it to shrink down to a point. It is a region of empty space with a point-like singularity at the center and an event horizon at the outer edge.
Galaxy : One of the basic building block of the universe. A massive system of stars, stellar remnants, gas, dust, and possibly a hypothetical substance known as dark matter, bound together by gravity.
Atom : The basic building block of all normal matter, consisting of a nucleus orbited by a cloud of negatively-charged electrons.

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QUESTIONS LIST:

accretion : _ disk - diffuse material orbiting around a central body such as a protostar, a young star, a neutron star or a black hole.
mass : a measure of the amount of matter in a body.
molecule : a collection of atoms glued together by electromagnetic forces.
matter : anything that has both mass and volume (i.e. takes up space).
dark matter : matter that gives out no light and does not interact with the electromagnetic force, but whose presence can be inferred from gravitational effects on visible matter.
inertia : the natural tendency of objects to resist changes in their state of motion.
gravity : the force of attraction that exists between any two masses, whether they be stars, microscopic particles or any other bodies with mass.
cmbr : anagram for cosmic microwave background radiation, which is the “afterglow” of the big bang, a microwave radiation which still uniformly permeates all of space at a temperature of around -270°ck.
event horizon : a one-way boundary in space-time surrounding a black hole. any matter or light that falls through it can never leave, and any event inside it cannot affect an outside observer.
magnetic : _ field - the field of force that surrounds a magnet.
electron : a negatively-charged sub-atomic particle. it is an indivisible, elementary particle, and is usually to be found orbiting the nucleus of an atom.
photon : a particle of light or other electromagnetic radiation, which has no intrinsic mass and can therefore travel at the speed of light.
big bang : the huge “explosion” 13.7 billion years ago in which the universe is thought to have been created.
light year : a convenient unit for measuring the large distances in the universe.
black hole : the warped space-time remaining after the gravity of a massive body has caused it to shrink down to a point. it is a region of empty space with a point-like singularity at the center and an event horizon at the outer edge.
galaxy : one of the basic building block of the universe. a massive system of stars, stellar remnants, gas, dust, and possibly a hypothetical substance known as dark matter, bound together by gravity.
atom : the basic building block of all normal matter, consisting of a nucleus orbited by a cloud of negatively-charged electrons.