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The sunspot record since 1749 is made of three major cycles (9.98, 10.9 and 11.86 yr). The side frequencies are related to the spring tidal period of Jupiter and Saturn (9.93 yr) and to the tidal sidereal period of Jupiter (11.86 yr). A…

Solar and Stellar Astrophysics · Physics 2012-03-20 Nicola Scafetta

The historical Hungarian auroral record extends from 1523 to 1960 and is longer than the sunspot record. Harmonic analysis reveals four major multidecadal secular cycles forming an approximate harmonic set at periods of 42.85, 57.13, 85.7…

Earth and Planetary Astrophysics · Physics 2013-02-12 Nicola Scafetta , Richard C. Willson

Commenting the 11-year sunspot cycle, Wolf (1859, MNRAS 19, 85-86) conjectured that "the variations of spot frequency depend on the influences of Venus, Earth, Jupiter, and Saturn". The high synchronization of our planetary system is…

Geophysics · Physics 2022-08-22 Nicola Scafetta , Antonio Bianchini

During the last few years a number of works have proposed that planetary harmonics regulate solar oscillations and the Earth climate. Herein I address some critiques. Detailed analysis of the data do support the planetary theory of solar…

Geophysics · Physics 2014-12-02 Nicola Scafetta

Solar quasi-biennial oscillations with period range 0.6 to 4 years, are prominent in records of solar activity. Here we show that the 1.6 year quasi-biennial oscillation in solar activity has the exceptional feature of phase inversion…

Solar and Stellar Astrophysics · Physics 2021-10-27 Ian R. Edmonds

Orbital systems are often self-organized and/or characterized by harmonic relations. Inspired by music theory, we rewrite the Geddes and King-Hele (QJRAS, 24, 10-13, 1983) equations for mirror symmetries among the distances of the planets…

Popular Physics · Physics 2022-02-09 Michael J. Bank , Nicola Scafetta

The geometric arrangement of planet and moon orbits into a regularly spaced pattern of distances is the result of a self-organizing system. The positive feedback mechanism that operates a self-organizing system is accomplished by harmonic…

Earth and Planetary Astrophysics · Physics 2017-08-30 Markus J. Aschwanden

Numerical integrations of the Solar System reveal a remarkable stability of the orbits of the inner planets over billions of years, in spite of their chaotic variations characterized by a Lyapunov time of only 5 million years and the lack…

Earth and Planetary Astrophysics · Physics 2023-05-05 Federico Mogavero , Nam H. Hoang , Jacques Laskar

We investigate whether or not the decadal and multi-decadal climate oscillations have an astronomical origin. Several global surface temperature records since 1850 and records deduced from the orbits of the planets present very similar…

Geophysics · Physics 2010-05-31 Nicola Scafetta

Although the discovery of the chaotic motion of the inner planets in the solar system dates back to more than thirty years ago, the secular chaos of their orbits still dares more analytical analyses. Apart from the high-dimensional…

Earth and Planetary Astrophysics · Physics 2021-11-03 Federico Mogavero , Jacques Laskar

Our understanding of the Solar System has been revolutionized over the past decade by the finding that the orbits of the planets are inherently chaotic. In extreme cases, chaotic motions can change the relative positions of the planets…

Astrophysics · Physics 2007-05-23 N. Murray , M. Holman

This paper explores a possible linkage between solar motion about the solar system center of mass and the quasi-periodicity evident in the pressure and temperature of planet atmospheres. We establish that dominant mid frequency range…

Earth and Planetary Astrophysics · Physics 2023-08-25 Ian R. Edmonds

Since the formulation of the problem by Newton, and during three centuries, astronomers and mathematicians have sought to demonstrate the stability of the Solar System. Thanks to the numerical experiments of the last two decades, we know…

Earth and Planetary Astrophysics · Physics 2014-12-24 Jacques Laskar

The discovery of the chaotic motion of the planets in the Solar System dates back more than 30 years. Still, no analytical theory has satisfactorily addressed the origin of chaos so far. Implementing canonical perturbation theory in the…

Earth and Planetary Astrophysics · Physics 2022-06-08 Federico Mogavero , Jacques Laskar

The physical basis of chaos in the solar system is now better understood: in all cases investigated so far, chaotic orbits result from overlapping resonances. Perhaps the clearest examples are found in the asteroid belt. Overlapping…

Astrophysics · Physics 2009-11-07 M. Lecar , F. Franklin , M. Holman , N. Murray

This work investigates the solar quasi-periodic cycles with multi-timescales and the possible relationships with planetary motions. The solar cycles are derived from long-term observations of the relative sunspot number and microwave…

Solar and Stellar Astrophysics · Physics 2012-10-16 Baolin Tan , Zhuo Cheng

The solar system has changed dramatically since its birth, and so did our understanding of it. A considerable research effort has been invested in the past decade in an attempt to reconstruct the solar system history, including the earliest…

Earth and Planetary Astrophysics · Physics 2015-07-17 D. Nesvorny , F. Roig

Herein we show that the historical records of mid-latitude auroras from 1700 to 1966 present oscillations with periods of about 9, 10-11, 20-21, 30 and 60 years. The same frequencies are found in proxy and instrumental global surface…

Earth and Planetary Astrophysics · Physics 2015-03-20 Nicola Scafetta

We investigated the underlying architecture of planetary systems by deriving the distribution of planet multiplicity (number of planets) and the distribution of orbital inclinations based on the sample of planet candidates discovered by the…

Earth and Planetary Astrophysics · Physics 2015-06-05 Julia Fang , Jean-Luc Margot

The long-term variations in the orbit of the Earth govern the insolation on its surface and hence its climate. The use of the astronomical signal, whose imprint has been recovered in the geological records, has revolutionized the…

Earth and Planetary Astrophysics · Physics 2023-03-22 Nam H. Hoang , Federico Mogavero , Jacques Laskar
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