Since its orbit is inside Earth’s orbit, the angle between the Sun and Venus is always less than 90°. So, if Venus is …

A sundial is basically a simple clock, where a stick is fixed on a flat surface. The surface is marked such that the s…

We measure the temperature of far-away objects by investigating the radiation (mostly light) they emit, and we can do t…

The Sun’s energy comes from nuclear reactions that is the conversion of hydrogen to helium by the fusion reaction.  Th…