Space Flashcards
Order of the planets from the sun outwards
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune
Uses of artificial satellites
Observation of the earth, weather monitoring, astronomy and communications
How do stars form
When enough dust and gas is pulled together by gravitational attraction that it gains enough mass to become a star
How do planets form
When smaller masses form from dust and gas and be attracted by a larger mass
What are stars composed of
Mainly hydrogen and helium and their energy is supplied by a fusion of hydrogen into helium
Life cycle of a star
Protostar to main sequence to red giant to white dwarf to black dwarf
How is a star stable during main sequence period
The outward force of thermal expansion is balanced out by the inward force of gravity
Supernovae
Supernovae are more massive stars with a different life cycle after the main sequence period, they become red supergiants followed by an explosion in which the outer layers of the star are ejected, this is called a supernova and the star will shine for a relatively short time with the brightness of 10 billion suns, after the supernova the remaining core of the star may collapse more
Black holes
Black holes have such a strong gravitational field that nothing can escape from it including electromagnetic radiation such as light
Red shift
Light from other galaxies is shifted to the red end of the spectrum, this can be explained by space expanding
CMBR
CMBR (Cosmic Microwave Background Radiation) is further evidence of the Big Bang and the Big Bang model is the only model that explains CMBR
Big Bang model
The rapid expansion and cooling of the universe
The eventual formation of protons and neutrons, further expansion and cooling lead to the formation of nuclei
Eventually the temperature had dropped sufficiently enough for electrons to combine with neutrons and protons to form atoms of hydrogen
