Astronomy

Physical Science: Origins and Principles

Physical Science: Origins and Principles

Here is Salviati s description of Galileo s experiment: A piece of wooden moulding . . . about 12 cubits5 long, half a cubit ... which means...
National Newsletter

National Newsletter

Many amateurs are interested in astrophotography, probably because all sorts of photographic equipment is easily ... Another expedition went to Java, Indonesia and to Papua New Guinea to observe s...