Luminosity, Temperature and Radius

By utilizing the Stefan-Boltzmann Law and the basic properties of a sphere's surface area, a star's luminosity, temperature, and radius can be mathematically related and thus used to calculate each other.


Why Study Variable Stars

From measuring the distances to galaxies to discovering new planets, studying variable stars allows us to refine our current understanding of astrophysics and get to the heart of how our universe works.


WCS Coordinates

The World Coordinate System (WCS) is the RA and Dec embedded in a FITS image. Multiple tools, such as and MaximDL can insert WCS coordinates into the image

HR Diagram

Stellar Death – High Mass Stars

High mass stars have a more stable evolution from one fusion process to the next. As iron fills the core, the star begins to implode and fall into itself. There are two types of supernovae, based on the hydrogen content.

HR Diagram

HR Diagram and Star Clusters

Clusters (which come in open, associations, and globular varieties) provide the best means for us to compare theories to actual stellar evolution and can be studied via photometry and spectroscopy.