I think there are 9 planets in our solar system, including the Earth.
Someday planetary space travel for tourists may become a reality.
Is there any intelligent life living on this planet?
We could see another planet through the telescope at the
observatory.
Aldous Huxley once said that maybe this world is another planet's Hell.
Blue whales are the largest animals to have ever lived on our planet.
If we don't do something to stop pollution, we may eventually kill most of the life forms living on our planet
today.
Jupiter is so big that all the other planets could fit inside it.
Nikolai Copernicus, a Polish astronomer, was the first person to comprehend that planets move around the sun.
Jupiter's largest moon is bigger than Mercury, the smallest planet.
Saturn has the
greatest number of known moons of any planet in the solar system.
The planet Venus is named after the Roman goddess of love.
Jupiter is more than two and a half times larger than all the other planets combined.
In March of 1966, a Soviet spacecraft landed on Venus, the first spacecraft to land on another planet.
The discovery of the planet Pluto was announced in March of 1930.
Scientists have discovered over 20 planets outside our solar system.
In geological terms, Mars represents an intermediate phase in planetary development which is transitional between a body like the moon and our own Earth.
The surface fluids on our planet are in constant motion.
Iris Murdoch once said that people from a planet without flowers would think we must be mad with joy the whole time to have such things about us.
Discussion question: Do you believe that life exists on other planets?
Find someone who can name five other planets.