Download Physics 130 - Las Positas College

Astronomy 30: Quiz Guidelines – Nov 4
There will be a short quiz on Nov.4. Our last quiz covered significant figures, the scale
of the solar system, and the ecliptic, etc. So, the quiz this Thursday will cover
•
•
•
•
•
•
•
orbits of planets and eccentricity (basic)
kepler’s laws (e.g., planets move faster as they approach, slower as they move
away from the sun)
relative brightness of stars
o which is brighter a 0 magnitude star or 1 magnitude
o if the difference in magnitudes is 2, the difference is brightness is (2.5122)
…
where does the energy of stars come from
evolution of stars (stages)
if a star is hotter is it bluer or redder?
where does a star spend most of its lifetime on an HR diagram?
We will have a quick review before the quiz.