They observed that all the stars seemed to stay still relative to each other except a small group of stars they called 'planets' the Greek for 'wanderers'. Later it was discovered that the Planets were entirely unrelated to stars and much, much closer.
Mercury, Venus, Earth and Mars are known as "inner planets" or "terrestrial planets".
There were 6 known planets, Uranus and Neptune weren't discovered yet.
Yes, inner planets are known as terrestrial planets because they are rocky in nature and have solid surfaces. The inner planets include Mercury, Venus, Earth, and Mars, all of which have similar characteristics compared to the outer gas giants.
Well there are many different ways to look at it. If you are just talking about in iur solar system there are only two planets. Mars and Jupiter. Mars is totally red, and Jupiter is yellow, red, brown and white.
They named the planets after their gods.
The Greeks were polytheistic. They had many gods, including the gods that the planets (including Pluto) other than Earth were named after.
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.
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.
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.
planets were named as discovered, so when the Greeks found them the were named with greek,
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.
There are more than 300 known stars with known planets, and the list gets longer all the time.
There are 464 extrasolar planets, and 8 planets within our Solar System. This makes a total of 470 known planets.