The Jah-Bar Non-Entity is a small crystal that is a bit like a life-form, although technically it is not a living object. It passes through The Solar System on its journey round The Galaxy roughly every 3,000 years, and is protected by the Martian Natural Rights Company.
It passes throuhg for the first time a few million years ago, and the first recorded time was 82,642 BC by the Raven. It was then seen again after it was forgotten about for 80,000 years in 591 AD. (link to timeline). It passes in 3501 AD, then again in 6453 AD, when the Martians planted a Galactic Tracking Device on it for scientific research.