Surveying the Cosmos – Part II

In a previous post  I talked about the Large Synoptic Survey Telescope (LSST), a large telescope being built in Chile which will spend 90% of its time surveying most of the sky a total of  1000 times over a 10 year period (in the remaining 10% it will revisit areas of specific interest).  In this… Continue reading Surveying the Cosmos – Part II

Stellar aberration

This post is a bit more technical than usual and discusses stellar aberration, the apparent movement of stars as a result of the motion of the Earth.  It is an interesting case of the application of the scientific method.  Observations were made to test a scientific theory, but unexpected results were found, which in turn… Continue reading Stellar aberration