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The American Association of Variable Star Observers (AAVSO) to Host Meeting in Toronto, Canada June 13 – 16, 2019

The American Association of Variable Star Observers (AAVSO) is an international non-profit organization of variable star observers whose mission is to enable anyone, anywhere, to participate in scientific discovery through variable star astronomy. The organization will host its Spring Meeting June 13 – 16 in Toronto, Canada. The AAVSO was […]

Figure 1 – Spectrum of a Sun like star

The SkyTools 4 Imaging Model

By Greg Crinklaw Major professional observatories, such as ESO, use mathematical models of their telescope and instruments to plan their observations. It is useful to know the image scale, what exposure times to use, whether a star will bloom or if the signal will become nonlinear, and how many exposures […]