Subject :NSO Class : Class 5
Ans 1:
Class : Class 7
Nicolas Copernicus discovered that Sun is in the centre and all other 8 planets Mercury, Venus, Earth, Mars, Saturn, Jupiter, Uranus and Neptune revolve around the Sun
Ans 2:
Class : Class 8
Nicolas Copernicus discovered that the Sun is in the centre of the Solar system and that all the other planets revolved around it.