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The anomalous time depending blueshift, the so-called "Pioneer anomaly", that was detected in the radio-metric data from Pioneer 10/11, Ulysses and Galileo spacecraft may not result from a real change of velocity. Rather, the Pioneer…

General Relativity and Quantum Cosmology · Physics 2007-05-23 J. P. Mbelek

A series of dynamical anomalies in the orbits of distant trans-Neptunian objects points to a new celestial body (usually named Planet Nine) in the solar system. In this draft, we point out that a mirror planet captured from the outer solar…

Earth and Planetary Astrophysics · Physics 2022-10-11 Pei Wang , Yu Chen Tang , Lei Zu , Yuan Yuan Chen , Lei Feng

The analysis of the Pioneer 10 and 11 data demonstrated the presence of an anomalous Doppler frequency blue-shift drift which is interpreted as an anomalous acceleration. The Doppler frequency dirft follows by considering the motions of the…

General Physics · Physics 2007-06-13 Walter Petry

A web of interlocking observations has established that the expansion of the Universe is speeding up and not slowing, revealing the presence of some form of repulsive gravity. Within the context of general relativity the cause of cosmic…

Astrophysics · Physics 2008-11-26 Michael S. Turner , Dragan Huterer

Planetary science beyond the boundaries of our Solar System is today in its infancy. Until a couple of decades ago, the detailed investigation of the planetary properties was restricted to objects orbiting inside the Kuiper Belt. Today, we…

Earth and Planetary Astrophysics · Physics 2015-06-18 Giovanna Tinetti

In this review we discuss constraints on minimal supersymmetric models of particle physics implied by the recent astrophysical observations of WMAP. Although the prospects of detecting supersymmetry increase and 90 percent of the available…

High Energy Physics - Phenomenology · Physics 2011-05-05 A. B. Lahanas , N. E. Mavromatos , D. V. Nanopoulos

The physical basis of the modern cosmological inflationary models with baryosynthesis and nonbaryonic dark matter and energy implies such predictions of particle theory, that, in turn, apply to cosmology for their test. It makes physics of…

Astrophysics · Physics 2007-05-23 Maxim Yu. Khlopov

Two decades after its discovery, cosmic acceleration remains the most profound mystery in cosmology and arguably in all of physics. Either the Universe is dominated by a form of dark energy with exotic physical properties not predicted by…

The concept of oscillatory Universe appears to be realistic and buried in the dynamic dark energy equation of state. We explore its evolutionary history under the frame work of general relativity. We observe that oscillations do not go…

General Physics · Physics 2013-03-15 Partha Pratim Ghosh , Saibal Ray , A. A. Usmani , Utpal Mukhopadhyay

This work proposes an explanation of the Pioneer anomaly, the unmodelled and as yet unexplained blueshift detected in the microwave signal of the Pioneer 10 and other spaceships by Anderson {\it et al} in 1998. What they observed is similar…

General Relativity and Quantum Cosmology · Physics 2009-11-10 Antonio F. Ranada

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

In this paper we review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating Universe. In particular we discuss the arguments for and recent progress made towards…

High Energy Physics - Theory · Physics 2008-11-26 Edmund J. Copeland , M. Sami , Shinji Tsujikawa

Observing the Universe, astronomers have concluded that the motion of stars can not be accounted for unless one assumes that most of the mass in the Universe is carried on by a ``dark matter", so far impervious to all attempts at being…

Exactly Solvable and Integrable Systems · Physics 2015-06-26 Boris A. Kupershmidt

The modestly eccentric and non-coplanar orbits of the giant planets pose a challenge to solar system formation theories which generally indicate that the giant planets emerged from the protoplanetary disk in nearly perfectly circular and…

Earth and Planetary Astrophysics · Physics 2025-11-06 Garett Brown , Renu Malhotra , Hanno Rein

The Pioneer 10 and 11 spacecraft yielded the most precise navigation in deep space to date. However, while at heliocentric distance of $\sim$ 20--70 AU, the accuracies of their orbit reconstructions were limited by a small, anomalous,…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Slava G. Turyshev , Michael Martin Nieto , John D. Anderson

We review the orbital dynamics exhibited by the first extra-solar planetary system discovered, Upsilon Andromedae. This system is unique in combining all of the surprising architectural features displayed individually by extrasolar…

Astrophysics · Physics 2007-05-23 E. I. Chiang

The neutron lifetime anomaly has been used to motivate the introduction of new physics with hidden-sector particles coupled to baryon number, and on which neutron stars provide powerful constraints. Although the neutron lifetime anomaly may…

High Energy Physics - Phenomenology · Physics 2022-04-12 Jeffrey M. Berryman , Susan Gardner , Mohammadreza Zakeri

Solar neutrinos, generated abundantly by thermonuclear reactions in the solar interior, offer a unique tool for studying astrophysics and particle physics. The observation of solar neutrinos has led to the discovery of neutrino oscillation,…

High Energy Physics - Phenomenology · Physics 2025-01-20 Shaomin Chen , Xun-Jie Xu

We show that the anomalous acceleration of the Pioneer 10/11 spacecraft can be explained if there is some mirror gas or mirror dust in our solar system.

High Energy Physics - Phenomenology · Physics 2008-11-26 R. Foot , R. R. Volkas

The cause for the observed acceleration in the expansion of the universe is unknown, and referred to as "dark energy" for convenience. Dark energy could be an unknown energy component, or a modification of Einstein's general relativity.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Yun Wang