Naked eye astronomy What is that - naked eye astronomy? Well...
it's a very old science. There were astronomers way before the
telescopes. People looked at the stars for thousands of years
without any optical aid. And, with a lot of perseverance they
got awesome results. They learned the apparent rotation of the
stars, sun, moon and planets. It was counter intuitive to
realize the Earth rotation so many early astronomers thought
that our sky is revolving around us. Planets were special
objects because they don't follow the same "sky paths" as normal
stars. Without any optical aid, there are 5 visible planets.
They look like bright stars. You can simulate the motion of
stars and planets in Sky Map Online by going forward (or
backward) a specific time interval. For example, move forward
one hour at a time. Stars will rise from east and set to the
west. It's really amazing how people actually unlocked a lot of
our universe mysteries by just rigorous star and planets
observations. They figured out and calculated