Finally, Iguda and Tanno headed back to our home planet, Earth. It’s the only place that scientists have confirmed that life exists. And what an incredible planet it is:

Earth factfile 
Position from the sun3rd planet
Diameter 12,700 km
Distance from sun150,000,000 km
Day length 24 hours
Year length 365.25 days
Number of moons1
Surface temperature15 °C
Surface gravity9.81 m/s2
AtmosphereNitrogen, Oxygen
Fun fact: The time taken for Earth to turn once on its axis is 0.997 Earth days!


Find out about how biologists classify the living things on Earth into five Kingdoms.

There are so many differences between all the living things on Earth that we have trouble even deciding on how to say what makes some thing alike and some things different. The BBC has some helpful information on its Bitesize website. Click Here and also click here to visit Bitesize pages.

Draw a big diagram, set out like a tree or flowchart, to illustrate the idea of classification in biology. Add some example animals, or other living things, on to your diagram show how classification works.

Look out for all the incredible FunPostcardsFrom … series: PostcardsFromDeepSpace, PostcardsFromVolcanoes, PostcardsFromTheBody, PostcardsFromArt,

Check out what series are available by clicking here.

You can go to the previous secret pages by clicking the planets below.

The MoonVenusMercury
Moon landing sites for Apollo missions
The SunMarsAsteroids
An image of the Sun in 2018 when it had no sunspots.
Hubble Views of JupiterQuadruple Saturn moon transit snapped by HubbleThis is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986.
Neptune showing it's storms, the great spot and scooterIn July 2015, NASA's New Horizons spacecraft sent home the first close-up pictures of Pluto and its moons.