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Birthday · February 4, 2001

Welcome to Planet Earth

February 4, 2001

Another year older means another lap aboard a world spinning through the void at impossible speed.

Welcome to Planet Earth

A little universe, just for you

Your date.
Ready to give.

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APOD published February 4, 2001. Full image credits are on the original APOD entry below. A publication-date match, not a photo taken on your date. Independent of NASA.

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Welcome to Planet Earth

Original APOD · February 4, 2001

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. 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 Sun. 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.

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