You find a nice meteorite on the beach and bring it to UCF’s…

You find a nice meteorite on the beach and bring it to UCF’s Department of Physics for analysis.  The results: abundance of 18O = 2022.33 ppm. Isotope SMOW Your meteorite 18O 2005.20 ppm 2022.33 ppm 17O 379.9 ppm ? 16O everything else ? This abundance of 18O means that…

When we look at light reflected from places like the polar i…

When we look at light reflected from places like the polar ice caps of Mars, we look for absorption “features” like the three shown here in the red enclosures for two different sizes of CO2 ice granules:   What is the physical meaning of the large dips in the data at 2.7 microns (μm), 2.8 microns and 3.3 microns, all infrared wavelengths?