1. Occurrence of ozone is most relevant for the presence of life on Mars.
2. The mean distance from the earth to the Sun is 149200000 km.
3. Earth has the largest amount of oxygen.
4. 28 days the moon takes to return to the same position among the constellations.
5. Stars which appear single to the naked eye but are double stars when observed by a telescope, are known as Binderies.

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