H-R Diagram
What two properties does the HR diagram compare?
What is temperature and luminosity?
What type of galaxy is the Milky Way and where is the Earth's solar system located?
What is spiral galaxy and it's located in one of the spiral arms?
What does the Big Bang Theory explain?
What is the origin of the universe?
What does the Doppler shift measure?
What is changes in wavelength due to motion?
What is cosmic background radiation?
What is faint energy left over from the Big Bang?
Where are the hottest stars located on the HR diagram?
What is the left side?
Which galaxy type is round or oval-shaped?
What is elliptical?
Approximately how old is the universe?
What is 13.8 billion years?
What does a redshift indicate about a galaxy’s motion?
What is it's moving away from us?
How was cosmic radiation discovered?
What is accidentally by radio antenna interference?
What type of stars are found in the upper right corner of the HR diagram?
What are red giants?
Which galaxy type often contains young stars and lots of gas and dust?
What is irregular?
What evidence supports the Big Bang Theory?
What is redshift and cosmic background radiation?
What does a blueshift indicate?
What is the object is moving toward us?
Why is cosmic radiation important to scientists?
What is it provides evidence of the Big Bang?
What is the main sequence on the HR diagram?
What is a diagonal band where most stars lie?
What are the 3 parts of a spiral galaxy?
What is a disk containing the spiral arms, a central nuclear bulge, and a spherical halo?
What happened immediately after the Big Bang?
What is rapid expansion and formation of basic particles?
How does Doppler shift support the idea of an expanding universe?
What is most galaxies show a red shift?
What kind of radiation is cosmic background radiation?
What is microwave radiation?
What does a star’s position on the HR diagram tell us about its life cycle?
What is its current stage and future evolution?
What type of stars make up most of an elliptical galaxy and why?
What is old, red stars because they contain little or no gas and dust?
What is the role of hydrogen and helium in the Big Bang Theory?
What is they were the first elements formed?
What type of waves does Doppler shift apply to in astronomy?
What is light waves?
What does the uniformity of cosmic radiation suggest?
What is the universe was once very hot and dense?