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Cagliari, Italy

University of Cagliari

Earth Sciences

SCIENZE DELLA TERRA

Language: Italian Studies in Italian

University website: www.unica.it

Earth

Earth is the third planet from the Sun and the only object in the Universe known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4.5 billion years ago. Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.

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Earth

But the meek shall inherit the earth; and shall delight themselves in the abundance of peace.

David, Book of Psalms 37:11.

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Earth

He is a lover of righteousness and justice. With the loving-kindness of Jehovah the earth is filled.

Book of Psalms 33:5.

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Earth

The surface of the earth is the shore of the cosmic ocean. On this shore we've learned most of what we know. Recently we've waded a little way out, maybe ankle-deep, and the water seems inviting.

Carl Sagan,Cosmos: A Personal Voyage (1990 Update) The Shores of the Cosmic Ocean [Episode 1], 03 min 55 sec

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Physical sciences, Earth sciences

Collecting solar heat for factories

Combustion of fossil fuels for the heating, cooling and electricity needs of a large factory produces substantial emissions and detrimental impact on the environment. Harnessing thermal energy from the Sun may soon be a cost-effective alternative.

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