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There used to be 9 planets and more than 170 moons in our solar system.
The 9 planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
But in August 2006, the International Astronomical Union decided to re-classify Pluto as a “dwarf planet”, and not in the same category as the 8 planets.
So now there are 8 planets in the solar system.
Each planet goes around the Sun on its own path called orbit.
Anyway we cannot see the paths because they are invisible.
Earth takes about 365 days to orbit the Sun.
This is called one Earth year.
And each moons moves around its planet in its own orbit.
The size of the planet from the smallest to the biggest:
People travel to space in a spacecraft or spaceship.
This is a very special Transit Of Venus video from NASA.
The video was captured from NASA’s Solar Dynamics Observatory or SDO.
According to NASA’s Goddard Space Flight Center, SDO is the most advanced spacecraft ever designed to study the sun, and it provides images with a resolution eight times better than high-definition television.
To view pictures of the Transit of Venus, please click: