Abundances of hydrogen and helium isotopes in Jupiter

Abundances of hydrogen and helium isotopes in Jupiter and other giant planets can answer important questions on the origin of elements in the solar system and the nature of processes in the sun. The Galileo Probe entered Jupiter in late 1995. In January of 1998, raw data from the Galileo Probe Mass Spectrometer (GPMS) were placed on the internet at the website that is given below: http://webserver.gsfc.nasa.gov/code915/gpms/datasets/gpmsdata.html. From the raw data we estimate values of He-3/He-4 = (2.17 +/- 0.03) x 10(-4) and H-2/H-1 approximate to 1.0 x 10(-4). These are higher than expected if the solar system formed from a homogeneous nebula (Wood, 1999) with subsequent production of excess He-3 by deuterium burning in the sun (Geiss, 1993). It appears that Jupiter formed instead from elements with some of the same chemical and isotopic irregularities observed in meteorites.