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Edexcel new P3

star life cycles, aliens, telescopes

QuestionAnswer
Black hole Core of a red super- giant that has collapsed.Formed if the remaining core has a mass of 3-4 times mass of our sun
Cosmic microwave background radiation (CMB) Microwave radiation that is all over the sky. Originating from the Big Bang. Supports Big Bang theory
Doppler effect Change in pitch of a sound coming from a moving source.
Extraterrestrials Beings that live on other planets apart from the Earth
Fusion reaction When two atoms join together to release energy. In the sun 2 hydrogen atoms fuse to make an Helium atom
Galaxy A group of millions of stars held together by gravity
Lander A space vehicle that lands on a moon or a planet
main sequence star A star during the main part of its life cycle. It is using hydrogen as its fuel for fusion like our Sun
Milky way The name of our galaxy
Nebula A cloud of gas in space. This is the start of a star's life cycle.
neutron star Core of a red super giant that has collapsed.
orbit The path a planet takes around a star or the path a satellite takes around a moon
protostar A cloud of gas drawn together by gravity. It has not yet got hot enough to make its own energy by fusion
red giant A star that has used up all the hyrogen in its core and is now fusing helium atoms together for its fuel. Bigger than a normal star.
red super giant A star that has used up all the hyrogen in its core and is now fusing helium atoms together for its fuel. Bigger than a normal star. It started as a star of much bigger mass than our sun.
red shift Waves that are emitted by a source moving away from the observer. The frequency appears to be lower than that of the stationary source and the wavelength longer.
rover A space vehicle that can move around on a planet or moon.
Search for Extraterrestrial Intelligence (SETI) Looking for intelligent life beyond by trying to detect radio signals from them.
Solar System An area of space where objects are influenced by the Sun's gravity
Space Probe A vehicle that can be put into orbit around a planet or moon or can be parachuted down through its atmosphere.
star A large ball of gas that produces heat and light from fusion reactions
Steady state theory The theory that the Universe is expanding but new matter is continuously being created so the Universe will always appear the same.
supernova An explosion produce when the core of a red super giant collapses.
Universe All the stars, galaxies and space itself
White dwarf A very dense star that is not very bright. A red giant turns into a white dwarf.
Big Bang Theory The theory that says the Universe started from a tiny point with huge energy and has been expanding ever since.
Created by: Susan E Casey