Why do we always see the same side of the moon? The moon’s rate of rotation and rate of revolution is the same
Most of the distant galaxies are moving away from our galaxy. Only a fraction of galaxies like Andromeda are coming to us. Scientists have found these things simply by observing the universe. How did you find out?
What is the difference between Geocentric theory and Copernican theory? What is the phase of Venus, which can not be found in the Geocentric theory?
Click the button to move to the planet you want. Is it closer than you think? If not, why?