A HOLE TELESCOPE If you cannot obtain a telescope to view the partial phase of a solar eclipse, here is another safe method. Obtain some pieces of cardboard (paper plates work well) and punch a hole in one. ... Before the eclipse, prepare a variety of holes of different sizes and then during the eclipse try them at varyinganbsp;...
|Title||:||Discovering the universe|
|Author||:||Charles E. Long|
|Publisher||:||HarperCollins Publishers - 1980|