Sloan Digital Sky Survey
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Multiple Observations

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How do I...

Find stars that have been seen more than once?

Most of the sky area seen by the SDSS has been observed only once over the course of the survey. However, there are many areas have been observed more than once, so there are many objects that have been observed at different times. Finding these objects could give more measurements for light curves of variable stars.

You can find these stars using an SQL Search (link opens in a new window). To learn more about SQL, see the SQL Tutorial. You can then examine each observation of the object using the Explore tool (new window).

Next: Using SQL to search for stars with multiple observations

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