▪ Abstract Our understanding of the evolution of organic molecules, and their voyage from
molecular clouds to the early solar system and Earth, has changed dramatically …

A systematic analysis of the mixing ratios with respect to H 2 O for eight species (CH 3 OH,
HCN, NH 3, H 2 CO, C 2 H 2, C 2 H 6, CH 4, and CO) measured with high-resolution infrared …

A computed list of H216O infrared transition frequencies and intensities is presented. The
list, BT2, was produced using a discrete variable representation two-step approach for …

The composition of cometary ices provides key information on the chemical and physical
properties of the outer solar nebula where comets formed, 4.6 Gy ago. This chapter …

The primordial disc of small icy planetesimals, once located at 15–from the Sun, was
disrupted by giant planet migration in the early Solar system. The primordial disc thereby …

We describe recent results on the CO/CO 2/H 2 O composition of comets together with a
survey of older literature (primarily for CO/H 2 O) and compare these with models of the …

Organic volatiles and water in Oort Cloud comets were investigated at infrared wavelengths.
The detected species include H2O, CO, CH3OH, CH4, C2H2, C2H6, OCS, HCN, NH3, and …

The evolution of life is affected by variations of atmospheric oxygen level and geomagnetic
field intensity. Oxygen can escape into interplanetary space as ions after gaining momentum …

In the current paradigm, Oort cloud comets formed in the giant planets' region of the solar
nebula, where temperatures and other conditions varied greatly. The measured …

The release of carbon monoxide from Comet C/1995 O1 Hale-Bopp was studied between
June 1996 and September 1997 using high resolution infrared spectroscopy near 4.7 μm …