This printable word search puzzle contains 18 hidden words in a 24x24 letter grid. Words go horizontally, vertically, backwards, and diagonally. This word search is also available to download as a Microsoft Word document or a PDF.
whitedwarf
luminosity
magnitude
pollux
arcturus
emission spectra
nuclear fusion
doppler effect
main sequence
spectroscopy
light years
blueshift
HRdiagram
redshift
hydrogen
isotope
helium
waves