The most well known planet is the earth, where we live on.
If the question is about planets that can be viewed in the night sky, then there are:
Mars, has many similarities with Earth; and is the subject of most Science Fiction creations from other worlds. It is the planet NASA is preparing to send visitors to.
Man has never set foot on any of the other planets, so you could say Earth. Landers and probes have been sent to the other planets though, Mars has received the most unmanned 'visits'.
Pluto is probably the most widely known one, as it was considered a planet for several decades.
The most popular planets are Venus, Mars, Saturn and the Earth.
The Earth. Without it, we would not be here and the question would not have been asked. :o)
I would say earth because that is where we live and grow. But another answer would be Jupiter because of it's massive size.
earth
saturn
what is the most beautiful planet in the universe
Pluto
Mercury is the most cratered planet in the solar system.
Earth is the planet with the most life forms.
the planet Venus is most like is Earth
earth
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The sun
Coruscant
i think mars
Earth is the most popular country in the solor system!!
rise of the Planet of the Apes
Les Paul
rise of the planet of the apes
Venus because of it's acidic atmosphere
He was - and still is - the most popular and most loved man on the planet.
They are one of the most versatile breeds on the planet.