Biomedical science and astronaut health are both served by a telehygiene system in space. It is to monitor blood pressure, heart rate and other body functions; it is also to interpret, for risk assessment, a spectrum of intermodulating ultradian-to-infradian rhythms and trends with age. This time structure, the chronome, consists, along with circadians, of about 3.5-day and about-7-day variations, the circasemiseptans and circaseptans, respectively. The latter characterize cardiovascular and other pathology. Chronobiologic assessment of elevation in the risk of developing cardiovascular, emotional and other disease is desirable for missions in space. Lunar along with terrestrial physiologic monitoring under conditions reproducing on-earth schedules considered and optimii.ed for a stay on the moon and also for space flights yields also basic information by comparisons of concomitant and sequential in-space-flight, lunar and terrestrial records. Space flights add control data on any effect upon the chronome of microgravity and/or of removal from cycles in geomagnetism, as gauged by the blood pressure and heart rate chronome. As the moon turns, it permanently shows the same face to the earth; cycles related to earth-moon interactions (the large gravitational pulls leading to the tides) are not felt on the moon, where it can be examined whether rhythms are influenced, though not necessarily synchronized, by physical cycles associated with geomagnetism, gravitational attraction or other effects of the moon and solar winds for life on earth.