Stars

Stars

WCS Coordinates

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

Stars

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.

Stars

Instrumental Magnitude

Instrumental magnitude is derived from the raw counts of a CCD image, and can be combined with other measurements to achieve both apparent and absolute magnitude.

Stars

Celestial Coordinates

Similar to latitude and longitude, Right Ascension and Declination define the celestial coordinate system used to locate and place celestial objects.

Stars

Stellar Motions

Stellar motions divide star movement into three categories: radial motion, proper motion, and a combination of the two (space motion).

Stars

Wien’s Law

Wein's Law relates light intensity to temperature, stating that the peak wavelength is the inverse of temperature, and temperature and intensity are directly correlated.