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.
please type in the planet name. Earth (if it is) was known by our ancestors. The first modern human beings on the earth.
Earth's exact age is indefinite but it is millions of years old. Humans discovered it when they had their first concious thought.
the planet Saturn
Earth is the only planet that has been discovered and has life and a sustained/sustainable atmosphere to date.
Earth...
No planets have been discovered using a microscope.
Jupiter
Jupiter
Oxygen was discovered by the very first species on planet Earth.
please type in the planet name. Earth (if it is) was known by our ancestors. The first modern human beings on the earth.
When humans evolved and realized they were standing on something.
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.