Stars closer to the horizon will appear to twinkle more than stars higher up in the sky because there is a lot more atmosphere between you and a star near the horizon.

Stars are equilibrium objects and governed by a set of relatively simple equations called the equations of stellar structure. We will discuss two of these and show how they can be used to …

The interiors of stars are opaque. Photons are absorbed and reemitted many many times on their way from the center to the surface: a random-walk process called diffusion.

This list of naked-eye stars indexes the stars in each constellation, using the letters of the Greek alphabet, followed by the genitive form of its parent constellation's Latin name, e.g., alpha …

We all know that the stars appear to move across the sky as the Earth rotates, but too few people actually have watched this happen. One purpose of this exercise is to use simple …

Astronomers measure the brightness of a star in the sky using a magnitude scale. On this scale, the brightest objects have the SMALLEST number and the faintest objects have the LARGEST …

Herschel (1800s) first measured the brightness of stars quantitatively and matched his measurements onto Ptolemy’s magnitude groups and assigned number for the magnitude of …