well the moon... but that's not really a planet so logically we found the closest planets first.
No planets have been discovered using a microscope.
Earth's exact age is indefinite but it is millions of years old. Humans discovered it when they had their first concious thought.
please type in the planet name. Earth (if it is) was known by our ancestors. The first modern human beings on the earth.
Saturn was the first planet discovered to have rings. They were first observed by Galileo Galilei in 1610 through his telescope.
There was no first discovered planet. Mercury, Venus, Mars, Jupiter, and Saturn have been known since ancient times from before anything was actually documented. They have no particular discoverer.
The first planet discovered besides Earth is Uranus. It was discovered by William Herschel in 1781.
Earth...
No planets have been discovered using a microscope.
Jupiter
When humans evolved and realized they were standing on something.
Mercury, Venus, Mars, Jupiter and Saturn can all be seen with the naked eye. So no one knows when a person looked into the sky and saw them.
THIS PLANET IS THE FIRST TO BE DISCOVERED BY MATH THIS PLANET IS THE FIRST TO BE DISCOVERED BY MATH
There really isn't a date the Earth was discovered, as humans have known of the existence of the planet since the species was first capable of symbolic thought.
Earth's exact age is indefinite but it is millions of years old. Humans discovered it when they had their first concious thought.
on planet earth
The earth as planet was discovered by some of the ancient astronomers. Nicolaus Copernicus and Ptolemy are credited with provision of the initial information of the earth as a planet in relation to the solar system.
please type in the planet name. Earth (if it is) was known by our ancestors. The first modern human beings on the earth.