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A material exists which links together the influx of meteoritic matter frominterplanetary space, the polar mesosphere summer echoes (PMSE), the sporadicsodium layers, the polar mesospheric clouds (PMCs, NLCs), and the observed ionchemistry in the mesosphere. The evidence in these research fields is hereanalyzed and found to agree well with the properties of Rydberg Matter (RM).This material has been studied with numerous methods in the laboratory. Alkaliatoms, mainly Na, reach the mesosphere in the form of interplanetary(meteoritic, cometary) dust. The planar RM clusters NaN usually contain N = 19,37 or 61 atoms, and have the density of air at 90 km altitude where they float.The diameters of the clusters are 10-100 nm from laboratory high precisionradio frequency spectroscopic studies. Such experiments show that RM clustersinteract strongly with radar frequencies: this explains the radio frequencyheating and reflection studies of PMSE layers. The clusters give the lowtemperature in the mesosphere by efficient selective radiation at longwavelengths, which is observed in RF emission experiments. The lowest possiblestable temperature of the mesopause is calculated for the first time to be 121K in agreement with measurements, based on the strong optical activity at longwavelengths in RM. Sporadic sodium layers are explained in a unique way as dueto shockwaves in the RM layers. Due to the high electronic excitation energy inRM clusters, they induce efficient reactions forming ions of all atoms andmolecules in the atmosphere thus providing condensation nuclei for watervapour. This finally gives the visible part of the PMC structure. The presentcontribution fills the gap between and partially replaces the separate theoriesused to describe the various aspects of these intriguing phenomena.

Rydberg Matter clusters of alkali metal atoms: the link between  meteoritic matter, polar mesosphere summer echoes (PMSE), sporadic sodium  layers, polar mesospheric clouds (PMCs, NLCs), and ion chemistry