Tagged With: wavelength

The Doppler Effect

Today we’ll talk briefly about a popular phenomena that few people understand: the Doppler Effect. Sound and light are waves. The pitch of the sound and the color of light are a result of the frequency of these waves, that is to say, how many times the wave “peaks” in one second. This is otherwise … Continue reading »

Categories: Astrophysics | Tags: , , , , , , , , , , , | 2 Comments

Classifying Stars – Luminosity, Brightness, Temperature, and Color

A few days ago, we talked briefly about how stars are made. But no two stars are identical: they can vary in size, internal pressure, temperature, composition, age, mass, mass loss, density, spectra, brightness, and luminosity. Today we’ll talk about some of their visual characteristics. Tomorrow, we’ll talk about their types, and how these two … Continue reading »

Categories: Astrophysics | Tags: , , , , , , , , , , , | Leave a comment