Slide 1 How Far is far ? Measuring the size of the Universe. Slide 2 The easiest way to measure the distance to a planet or star is through a method called parallax. The…
Slide 1 Twinkle, twinkle, little star, how I wonder what your Hertzsprung- Russell diagram classification….are. Slide 2 Stars are generally grouped into three colors:…
The Sun and other stars The physics of stars A star begins simply as a roughly spherical ball of (mostly) hydrogen gas, responding only to gravity and itâs own pressure.…