Neptune is
approximately 4400 million kilometers away from Earth. Neptune is about to
celebrate its first birthday. On July 12 will be a year-Neptunian-terrestrial
or 164.79 years since its discovery on September 24, 1846. But why do we know
so little about the distant planet?
At approximately 4400
million kilometers from Earth lies Neptune, the first planet in the solar
system to be discovered deliberately. After classification of the planet Uranus
in 1780, astronomers have been puzzled by his strange orbit. Scientists
concluded that either Isaac Newton's laws had a fundamental flaw or something
else-another-planet Uranus was pulling its expected orbit. And so began the
search for the eighth planet.
