Results 31 to 40 of about 232,489 (311)
Temperate Earth-sized planets transiting a nearby ultracool dwarf star [PDF]
Nature, 2016 Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ‘ultracool dwarfs’. This heterogeneous group includes stars of extremely low mass as well as brown dwarfs (substellar objects not massive enough to sustain ...
M. Gillon +14 more
semanticscholar +1 more source
Possible Transfer of Life by Earth-Grazing Objects to Exoplanetary Systems
Life, 2020 Recently, a 30-cm object was discovered to graze the Earth’s atmosphere and shift into a Jupiter-crossing orbit. We use the related survey parameters to calibrate the total number of such objects.
Amir Siraj, Abraham Loeb
doaj +1 more source
Two Distinct Magma Storage Regions at Ambrym Volcano Detected by Satellite Geodesy
Geophysical Research Letters, 2023 The flux of eruptible magma into a magmatic plumbing system influences eruption size and timing. If magma transfer is possible between two hydraulically‐connected magma lenses, system destabilization can tap a larger magma volume than stored in any one ...
T. Shreve +4 more
doaj +1 more source
No large population of unbound or wide-orbit Jupiter-mass planets [PDF]
Nature, 2017 Planet formation theories predict that some planets may be ejected from their parent systems as result of dynamical interactions and other processes. Unbound planets can also be formed through gravitational collapse, in a way similar to that in which ...
P. Mróz +11 more
semanticscholar +1 more source
Ready functions for calculating the Martian radiation environment
Journal of Space Weather and Space Climate, 2019 It is extremely important to understand and model the Martian radiation environment in preparation for future human missions to Mars, especially during extreme and elevated conditions such as an intense solar energetic particle (SEP) event.
Guo Jingnan +4 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
The GAPS Programme with HARPS-N at TNG - XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets [PDF]
, 2017 We carried out a Bayesian homogeneous determination of the orbital parameters of 231 transiting giant planets (TGPs) that are alone or have distant companions; we employed differential evolution Markov chain Monte Carlo methods to analyse radial-velocity
A. Bonomo +40 more
semanticscholar +1 more source
The California-Kepler Survey. IV. Metal-rich Stars Host a Greater Diversity of Planets [PDF]
, 2017 Probing the connection between a star’s metallicity and the presence and properties of any associated planets offers an observational link between conditions during the epoch of planet formation and mature planetary systems. We explore this connection by
E. Petigura +9 more
semanticscholar +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
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