| University of British Columbia, Okanagan | Viewed from Earth, the Moon is just far enough away to have almost the same apparent-sized disk as the Sun |
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| Asteroids and artificial satellites viewing Earth from the Cupola, 2010 Earth's population consists of , objects with a and | The average diameter of the reference spheroid is 12,742 kilometres 7,918 mi |
Which is scary because phytoplanktons are a food source for all living things and they if continue to diminish, Attenborough explains that it increases the chances of global warming if clouds reflect less of the sun's heat.
9| Global Earth Physics: A Handbook of Physical Constants | Above the and below the there is no daylight at all for part of the year, causing a , and this night extends for several months at the poles themselves |
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| The Köppen system rates regions based on observed temperature and precipitation | The first , which was more in composition, formed by the partial melting of this mafic crust |
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