|Location:||ZZ9 Plural Z Alpha|
|Appearances:||The Hitchhiker's Guide to the Galaxy|
Earth, also known as Sol 3, was the third planet in a solar system "far out in the uncharted backwaters of the unfashionable end of the Western Spiral Arm of the Galaxy", or the Milky Way. In reality, it was giant computer designed by the computer Deep Thought for the sole purpose of finding the Ultimate Question of Life, the Universe, and Everything to go along with the Ultimate Answer, which was originally calculated by Deep Thought. The planet was built by the Magratheans
Unfortunately, it was destroyed by the Vogons five minutes before the program was due to be completed. Later on, it reappeared, but it, as well as any chance of it ever reappearing again, was demolished again.
Earth was mainly populated by "ape-descended life forms", or Humans, which number around 6.5 billion at the time of the earth's destruction. The earth is also inhabited by a series of flora and fauna, including the mice and dolphins, the most and second most intelligent species on the planet respectively, with humans being the third.
Arthur Dent was also annoyed (mostly sad) when he found out Earth was destroyed.