Following up on his previous book "the Sky Is Your Laboratory," Buchheim reaches into the history of astronomy to present a new series of observations for amateurs to replicate with their own telescopes. Our understanding of the cosmos is built on a series of seminal observations, from recognizing the phenomena of seasons to discovering the laws of orbital motion, determining the temperature and composition of the stars and so on. Remarkably, all of these foundational observations can be made by students or amateur astronomers, using the naked eye, a digital camera, or a backyard telescope. With Buchheim's guidance, amateurs can follow in the footsteps of Hipparchus, Galileo, Hubble and others: see what they saw, repeat their measurements and re-discover in their own observations the insights that they brought to modern science.§§From confirming that the Moon s orbit is an ellipse to seeing the laws of orbital motion at work in the sky through a telescope and observing the moons obeying Kepler s 3rd law, this guide offers a variety of ideas for do-it-yourself science projects and a new way to look at the heavens. More targeted than Buchheim's previous book, it leads the reader on a journey across the sky in history.§