These are the classical planets, those that you can see without a telescope. These are Mercury, Venus, Mars, Jupiter and Saturn. they could be seen to be different to the stars, since they changed positions gradually in relation to the other stars (as they orbit the sun)
There were 6 known planets, Uranus and Neptune weren't discovered yet.
Yes because they are rocky planets and the outer planets are known as the gas planets.
Mercury, Venus, Earth and Mars are known as "inner planets" or "terrestrial planets".
The terrestrial planets.
The planets Uranus and Neptune are known as the ice giants.
They named the planets after their gods.
The Greeks did not 'find' five planets. The Earth and theother five visible planets have been visible on any clear night for as long as humans have walked the Earth. They were known to any caveman with normal vision, a touch of insomnia, and enough brain cells to be interested in the things he saw in the sky.
The earth is a planet, it has no known planets within.
The Greeks were polytheistic. They had many gods, including the gods that the planets (including Pluto) other than Earth were named after.
MercuryVenusEarthMarsJupiterSaturnUranus
I think the Romans named the planets after their gods.
The number of planets is not known. The number of stars is not known either, nor if all have planetary systems. Certainly many billions of billions.
It is not generally known how many planets are in each galaxy; it isn't even known how many planets are in our own galaxy, and will probably never be known exactly, due to its enormous size. However, according to latest observations, it seems likely that every star has several planets, at least on average.
Currently there are 353 known extrasolar planets (that is to say, outside of our solar system), but it is unknown how many planets exist in the universe.
There are more than 300 known stars with known planets, and the list gets longer all the time.
planets were named as discovered, so when the Greeks found them the were named with greek,
There were 6 known planets, Uranus and Neptune weren't discovered yet.