such observations from participants around the world and share the data with the scientific community.

From the light curve the following data are derived:
* are the brightness variations periodical, semiperiodical, irregular, or unique?
* what is the period of the brightness fluctuations?
* what is the shape of the light curve (symmetrical or not, angular or smoothly varying, does each cycle have only one or more than one minima, etcetera)?

From the spectrum the following data are derived:
* what kind of star

1.Previous
3.Next