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Edexcel new P3
star life cycles, aliens, telescopes
| Question | Answer |
|---|---|
| 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
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