SPACE Crossword
This printable crossword puzzle on the topic of Astronomy & Space has 11 clues. Answers range from 4 to 13 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
the sun is at this stage of stellar evolution
The frequency of the ambulance stays the same but because the wave source (the ambulance) moves, it seems the frequency changes as it moves.
Redshift happens when galaxies move ______
the theory of how the universe started
_______'s constant is used to calculate the age of the universe
if the density is bigger than critical density, we call this ______ universe
the mass that we cannot see but causing galaxies to rotate
the unknown energy which causes expansion accelerate
the distance to a star with parallax angle of 1 arcsecond
objective concept ‘luminosity’ to compare the brightness of stars measured in watts (W)
Flux depends on the luminosity and _______ of the star
