Astronomy Picture of the Day

Welcome to Planet Earth

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#99204 by @ 26.03.2007 00:00 - nach oben -
Welcome to Planet Earth

Welcome to Planet
Earth, the third planet from a
star named the

The Earth
is shaped like a sphere
composed mostly of rock.

Over 70 percent of the
Earth's surface is water.

The planet has a relatively thin
atmosphere composed mostly of
nitrogen and

The above picture of Earth, dubbed
Blue Marble,
was taken from
Apollo 17
in 1972 and features Africa and Antarctica.

It is thought to be one of the most
widely distributed photographs
of any kind.

Earth has a single large
Moon that is
about 1/4 of its diameter and, from the planet's surface,
is seen to have almost exactly the same angular size as the

With its abundance of liquid
Earth supports a large variety of
life forms,
including potentially intelligent species such as
dolphins and humans.

enjoy your stay on Planet Earth.

Credit & Copyright
#99205 by @ 26.03.2007 02:32 - nach oben -
chum bärbel, heb doch mol dä latz, alli andere sind so schön ruhig in letschter ziit