Ready References
A Guide to Backyard Astronomy
Binoculars: Halfway to a Telescope
Choosing Binoculars for Astronomy
Celebrated Variable Stars
Overview of Motion Control
Taking the Earth's Pulse
Getting Information About Chemicals
Ready References A Guide to Backyard Astronomy Binoculars: Halfway to a Telescope Choosing Binoculars for Astronomy 
Celebrated Variable Stars 
Overview of Motion Control Taking the Earth's Pulse Getting Information About Chemicals