Star life cycle
An explosive death of a star
Supernova
The currently accepted theory about the origin of the universe.
The Big Bang theory
The number of possible endings to the universe which we have learnt
Three
The shift of lines towards the red end of a light spectrum when the source is moving away from the observer
Red shift
Everything that exists in space
The universe
A cloud of dust and gas in space
Nebula
The most widely accepted theory before the Big Bang theory
Steady state theory
The name of the theory where the universe reaches a point of maximum expansion and collapses back into a tiny, very dense point.
Big Crunch
The change of wavelength frequency that occurs when an object producing light or sound is moving
The Doppler Effect
A huge collection of stars that are held together by gravity
Galaxy
The description of the majority of stars on the H-R diagram
Main sequence
The tiny, hot, dense point from which the universe began
singularity
The universe continues expanding until supplies of gas spread so thin that stars can no longer form or produce heat.
The Big Freeze or The Big Chill
Evidence has shown that the further away a galaxy is, the __________ it is moving.
The joining together of the nuclei of lighter elements to form another element, with the release of energy
Nuclear fusion
This is what a star becomes after hydrogen supplies deplete and nuclear fusion of helium occurs.
Red giant
The first element formed after the Big Bang
Hydrogen
The universe expands at an increasing rate, and eventually results in a universe full of single, disconnected particles.
The Big Rip
This phenomenon is known to occur when a object is moving away from a certain point
Decrease in wavelength frequency
A scale for measuring the brightness of an object when viewed from Earth
Apparent magnitude scale
The two possible results after the explosive death of a red supergiant.
Neutron star and black hole
The Big Bang theory predicted this type of radiation, which was discovered later on.
Cosmic background radiation
This fate of the universe would result in the end of time itself
The Big Rip
A coloured scale where dark lines appear, suggesting the absence of certain wavelengths of light
Absorption spectrum
A small, highly dense star, made mostly of neutrons
Neutron star