Results 21 to 30 of about 13,645 (266)
The Astrophysical Journal, 2014 Hot Jupiters formed through circularization of high-eccentricity orbits should be found at orbital separations $a$ exceeding $twice$ that of their Roche limit $a_{\rm R}$. Nevertheless, about a dozen giant planets have now been found well within this limit ($a_{\rm R}
Francesca Valsecchi, Frederic A. Rasio
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Stephen Hawking’s Warning on Contacting Aliens: A Physics Perspective on the Intelligence Trap [PDF]
Journal of Biomedical Physics and EngineeringThe search for extraterrestrial intelligence is a fascinating and important endeavor, but it raises significant ethical and safety concerns. In the search for extraterrestrial intelligence, scientists use knowledge of physics to identify potential ...
Seyed Mohammad Javad Mortazavi +4 more
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Singing Planets Don't Sing; They Speak
Musical Offerings, 2023 Ancient Greek philosophers conceived a theory called Music of the Spheres. This ancient theory progressed for almost one thousand years before finally proving itself untrustworthy.
Joanna R. Lauer
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Science, 1998 A planet orbiting in a disk of planetesimals can experience an instability in which it migrates to smaller orbital radii. Resonant interactions between the planet and planetesimals remove angular momentum from the planetesimals, increasing their eccentricities.
Murray, Norm +3 more
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High-Sensitivity Seismometer Development for Lunar Applications
Sensors, 2023 Lunar seismology is a critical area of research, providing insights into the Moon’s internal structure, composition, and thermal history, as well as informing the design of safe and resilient habitats for future human settlements. This paper presents the
Leandro A. N. de Paula +6 more
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A more advanced theoretical model of the sphere earth's EM in a foreign homogeneous EM field
Vojnotehnički Glasnik, 2023 Introduction/purpose: The paper describes a more advanced theoretical model of the Earth's EM field based on two-component hypotheses. A defined mathematical model that shows the rotation of the magnetically conducting sphere of Tthe magnetization M ...
Slobodan N. Bjelić, Nenad A. Marković
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Multiverse Predictions for Habitability: Number of Potentially Habitable Planets
Universe, 2019 How good is our universe at making habitable planets? The answer to this depends on which factors are important for life: Does a planet need to be Earth mass? Does it need to be inside the temperate zone? are systems with hot Jupiters habitable? Here, we
McCullen Sandora
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Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data
Earth and Space Science, 2021 The estimation of crustal structure and thickness is essential in understanding the formation and evolution of terrestrial planets. Initial planetary missions with seismic instrumentation on board face the additional challenge of dealing with seismic ...
Rakshit Joshi +4 more
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What the Upper Atmospheres of Giant Planets Reveal
Remote Sensing, 2022 The upper atmospheres of the Giant Planets, Jupiter, Saturn, Uranus and Neptune are transition regions between meteorological layers and outer space. As a result of their exceptionally rarefied nature, they are highly sensitive and therefore revealing ...
James O’Donoghue, Tom Stallard
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