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Identifying stellar objects Identification sheet Red dwarf star Red giant/supergiant star red in colour powered by fusion of elements heavier than hydrogen supergiants have mass of at least 1.5 of the Sun’s. Main sequence star usually yellow, white or blue depending on temperature (hotter = more blue) mass varies hugely usually orbited by planets sometimes exists in a pair (called binary system) almost entirely hydrogen. White dwarf star Galaxy a cloud of billions of stars more distant than all other objects often have irregular shapes or spiral shapes. Nebula low-density cloud of gas and dust mostly made of hydrogen other objects can be seen through it. Neutron star Protostar typically found inside ‘stellar nurseries’ (very large nebulae) emits light due to pressure heating of the moving particles no planets or orbiters 25762 energy comes from residual heat leftover after red giant sheds outer layers relatively dim. Black hole © www.teachitscience.co.uk 2016 about 8-15km across mass around 2x sun’s mass emits lots of x-rays. typically red and infrared in colour dim - cannot be seen at great distances low mass no fusion. singularity invisible causes light to bend around it usually spotted by hot mass of former star which is being sucked inwards very high mass. Supernova short-lived process giant star turns into something else extremely bright in all electromagnetic ranges can be seen in distant galaxies. Page 1 of 1