Mosaic: Welcome to Planet Earth
Explanation:
Welcome to Planet
Earth, the third planet from a
star named the
Sun.
The
Earth
is shaped like a sphere and
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
oxygen.
This
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.
Here,
the world famous image has been recast as a spectacular
photomosaic
using
over
5,000 archived images of Earth and space.
With its abundance of liquid
water,
Earth
supports a large variety of
life forms,
including potentially intelligent species such as
dolphins and
humans.
Please
enjoy your stay on Planet Earth.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.
