Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Gamma Microscopii is the brightest star in the constellation of Microscopium. It is a G-type giant star with an apparent visual magnitude of approximately 4.677, around 220 light-years from the Sun. Backwards extrapolation of the motion of Microscopii has shown that approximately 3.8 million years ago, it was only 6 light-years away from the Sun. It would then have had an apparent magnitude of 3 and have been brighter than Sirius is now.