7.1 Flashcards
absolute magitude
measure of how bright a star actually is
apparent magnitude
measure of how bright star appears to be
blue super giants
stars that are 10 or times bigger than the sun
binary star system
two stars orbiting a centre of mass
black hole
singularity. collapsed star so massive there’s no light
density
mass per unit volume of material
electromagnetic spectrum
different types of electromagnetic radiation ranging from radio waves to gamma rays
gamma rays
high energy electro mag waves
gavitational lensing
bending of light rays due to distortion of space by a big item
gavity
force that causes matter to gather
isotope
atoms with the same number of protons` but different numbers of nutrons
light year
distance light travels in a year
magnitude
brightness of star
main sequence
group of stars lying on a line running from top left to bottom right of HR diagram
neutrino
almost mass less particle