منابع مشابه
Stromatolites and Earth--sun--moon Dynamics
Vanyo, J.P. and Awramik, S.M., 1985. Stromatolites and Earth--Sun--Moon dynamics. Precambrian Res., 29 : 121--142. Inclination of stromatolite columns, caused by nonvertical direction of averaged incident solar radiation, provides a signal for deducing astronomical and geophysical data at time of stromatolite formation. A sample of Anabaria juvensis (Bitter Springs Formation, central Australia)...
متن کاملThe Wives of the Sun and Moon
In much Native American mythology, marriage is conceptualized as a monthly honeymoon interrupted at each dark moon by menstruation. Woman’s monthly alternation between marital sex and menstrual seclusion is coded as an alternation between her rival partners, Sun and Moon. Against this background, a Plains Indian myth attempts to come to terms with a novel problem. With the introduction of patri...
متن کاملMeteor stream activity IV. Meteor outbursts and the reflex motion of the Sun
A third meteor outburst of Aurigids was observed in 1994, similar to two previous events in 1935 and 1986. Again, the parent comet was far from perihelion. In search of a cause for these outbursts, the role of planetary perturbations was examined. It is found that the Aurigid outbursts, and other such outbursts, occurwhen the position of the planets Jupiter and Saturn are in two different confi...
متن کاملVitamin D and HIV: letting the sun shine in.
Vitamin D is important for cell growth, immunity, and metabolism. Deficiency has classically been associated with rickets and decreased bone density and more recently with increased risk and severity of autoimmune diseases, cancers, myocardial infarction, diabetes, and infectious diseases. How vitamin D can affect these diverse conditions is the subject of much research. The active form of vita...
متن کاملDoes the sun shine by pp or CNO fusion reactions?
We show that solar neutrino experiments set an upper limit of 7.8% (7.3% including the recent KamLAND measurements) to the fraction of energy that the Sun produces via the CNO fusion cycle, which is an order of magnitude improvement upon the previous limit. New experiments are required to detect CNO neutrinos corresponding to the 1.5% of the solar luminosity that the standard solar model predic...
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ژورنال
عنوان ژورنال: Nature
سال: 1884
ISSN: 0028-0836,1476-4687
DOI: 10.1038/030462b0