Solar neutrinos, martian rivers, and praesepe

ABSTRACT THE detection rate of solar neutrinos is significantly below the value predicted by contemporary theories of solar structure and evolution1,2. The most likely—or at least best

advertised—explanation of the discrepancy is episodic and probably periodic core expansion in the Sun3; in the models developed to date, mixing of 3He, produced by the p–p process, is the

initiating event4–7. Although the radiative transfer time scale of photons from the core to the photosphere of the Sun is long, all the models identify epochs of anomalously low neutrino

flux with epochs of anomalously low surface luminosity; and the temptation to connect the present “ice age” on Earth with low solar luminosity, _L_, has been unsuccessfully resisted. The

peak-to-peak variations in _L_, δ_L/L_, range from about 7% to about 35% in these models, enough to have significant climatological consequences (see, for example, ref. 8). The duration of

the variation is roughly the Kelvin–Helmholtz time scale ∼107 yr; to correspond to the principal glaciation period, the interval between mixings must be ∼2.5 × 108 yr. Access through your

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BEING VIEWED BY OTHERS A MULTI-CUBIC-KILOMETRE NEUTRINO TELESCOPE IN THE WESTERN PACIFIC OCEAN Article Open access 09 October 2023 DIURNAL VARIATIONS IN THE STRATOSPHERE OF THE ULTRAHOT

GIANT EXOPLANET WASP-121B Article Open access 21 February 2022 GLOBAL UPPER-ATMOSPHERIC HEATING ON JUPITER BY THE POLAR AURORAE Article Open access 04 August 2021 REFERENCES * Davis, R.,

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Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Laboratory for Planetary Studies, Cornell University, Ithaca, New York, 14850 CARL SAGAN * Jet Propulsion Laboratory,

California Institute of Technology, Pasadena, California, 91103 ANDREW T. YOUNG Authors * CARL SAGAN View author publications You can also search for this author inPubMed Google Scholar *

ANDREW T. YOUNG View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE

SAGAN, C., YOUNG, A. Solar Neutrinos, Martian Rivers, and Praesepe. _Nature_ 243, 459–460 (1973). https://doi.org/10.1038/243459a0 Download citation * Received: 05 April 1973 * Published: 01

June 1973 * Issue Date: 22 June 1973 * DOI: https://doi.org/10.1038/243459a0 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable

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