 Within the Solar System , the <unk> fraction of xenon is 1 @.@ 56 × 10 − 8 , for an abundance of approximately one part in 630 thousand of the total mass . Xenon is relatively rare in the Sun 's atmosphere , on Earth , and in asteroids and comets . The planet Jupiter has an unusually high abundance of xenon in its atmosphere ; about 2 @.@ 6 times as much as the Sun . This high abundance remains unexplained and may have been caused by an early and rapid buildup of <unk> — small , <unk> bodies — before the <unk> disk began to heat up . ( Otherwise , xenon would not have been trapped in the <unk> <unk> . ) The problem of the low terrestrial xenon may potentially be explained by <unk> bonding of xenon to oxygen within <unk> , hence reducing the outgassing of xenon into the atmosphere . 
