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The Universe Y10-SS2
Chapter 7 Pearson Places section 2
Question | Answer |
---|---|
Absolute magnitude | A measure of how bright a star would appear if it was 10 pc away. |
Apparent magnitude | A measure of the brightness of a star as it appears to an observer on Earth. |
Blue supergiants | Stars that are 10 or more times more massive than the sun. |
Black Dwarf | Cold dark remains of a white dwarf. |
Density | Mass per unit of volume of a material. |
Electromagnetic spectrum | Different types of electromagnetic radiation ranging from radio waves to gamma waves. |
Gamma waves | Very high energy electromagnetic rays. |
Isotope | Atoms with the same number of protons but different number of neutrons. |
Magnitude | A measure of the brightness of a star. |
Main sequence | A group of stars lying on a line running from the top left to the bottom right of the H-R Diagram. |
Neutrino | An almost mass-less, neutral particle released during some nuclear reactions. |
Neutron star | Remnant of a supernova, consisting entirely of neutrons. |
Plasma | State of matter consisting of positively charged ions and free electrons. |
Positron | A positively charged electron. |
Planetary nebula | A cloud of gas produced when a red giant runs out of fuel. |
Red Giant | A star produced when the core of a sun-sized star runs on hydrogen. |
Singularity | Also called a black hole. |
Spectral class | A classification system for stars based on their colour. |
Spectrometer | A device that splits light into a spectrum to show its component wavelengths. |
Supernova | A giant explosion that occurs when a star many times larger than our sun runs out of nuclear fuel. |
White dwarf | Hot, dense star that is the remains of a red giant. |