Results 21 to 30 of about 13,335 (266)
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
doaj +1 more source
Proceedings of the National Academy of Sciences, 2000 The first known extrasolar planet in orbit around a Sun-like star was discovered in 1995. This object, as well as over two dozen subsequently detected extrasolar planets, were all identified by observing periodic variations of the Doppler shift of light emitted by the stars to which they are bound.
J J, Lissauer, G W, Marcy, S, Ida
openaire +2 more sources
Disc-planet, planet-planet, and star-planet interactions during planet formation
, 2003 In this article we present results from three on-going projects related to the formation of protoplanets in protostellar discs. We present the results of simulations that model the interaction between embedded protoplanets and disc models undergoing MHD turbulence.
Nelson, Richard P. +1 more
openaire +2 more sources
Prospects for the characterization of habitable planets
Comptes Rendus. Physique, 2023 With thousands of exoplanets now identified, the characterization of habitable planets and the potential identification of inhabited ones is a major challenge for the coming decades.
Mazevet, Stephane +5 more
doaj +1 more source
The PLANET Collaboration [PDF]
Symposium - International Astronomical Union, 1996 A newly-formed microlensing monitoring network, the PLANET collaboration, is briefly described.
M. Albrow +11 more
openaire +1 more source
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
doaj +1 more source
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
openaire +2 more sources
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
openaire +3 more sources
Planet Formation and Disk-Planet Interactions [PDF]
, 2019 This review is based on lectures given at the 45th Saas-Fee Advanced Course 'From Protoplanetary Disks to Planet Formation' held in March 2015 in Les Diablerets, Switzerland. Starting with an overview of the main characterictics of the Solar System and extrasolar planets, we describe the planet formation process in terms of the sequential accretion ...
openaire +2 more sources