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The discovery of almost two thousand exoplanets has revealed an unexpectedly diverse planet population. We see gas giants in few-day orbits, whole multi-planet systems within the orbit of Mercury, and new populations of planets with masses between that of the Earth and Neptune—all unknown in the Solar System. Observations to date have shown that our Solar System is certainly not representative of...
Multiple non-resonance fluorescence lines of water (H 2 O) were detected in Comet 153/P Ikeya–Zhang (2002 C1) between UT 2002 March 21.9 (R h =0.51 AU) and April 13.9 (R h =0.78 AU), using the Cryogenic Echelle Spectrometer (CSHELL) at the NASA Infrared Telescope Facility. Analysis of 2.9-μm water lines enabled accurate determination of rotational temperatures on three dates...
Two different photosystem II particles isolated from pea, a core complex and the D1/D2/Cyt b-559 reaction centre (RC) complex, have been characterised by absorption, linear dichroism (LD) and circular dichroism (CD) spectroscopy. Only one carotenoid contributes to the LD of the reaction centre, in agreement with the biochemical analysis. This carotenoid is oriented parallel to the long axis of the...
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