Archive for August, 2009
Make Telescopes: The Perfect Machine
Thursday, August 13th, 2009The development of building a telescope was greatly aided by the construction of the achromatic lens.
In 1733, the achromatic lens was invented by Chester Moore Hall, an English barrister. This was accomplished by combining a convex crown and a concave flint lens in such a way that their focal lengths were inversely proportional to their […]
Make Telescopes Like The First Astronomers!
Tuesday, August 11th, 2009An investigation into early telescopes makes for interesting reading. In 1722, John Hadley, an English mathematician, completed a form of reflector for the telescope in the style of Newton in which the mirror evidently was suitably figured. This instrument attracted considerable attention, and presently other makers were turning out Newtonian reflectors, following Hadley’s technique, […]
Astronomy Software - A Simple Guide
Sunday, August 9th, 2009Astronomy is a popular subject. Many of these are men of science studied by train who study it by trade. Others are merely hobbyists who enjoy it. Hobbyists have even made many amazing discoveries. In the old days it was the job of telescopes. But now thanks to astronomy software, everyone with a computer can […]
