Results 51 to 60 of about 881,089 (353)

Hot Jupiters from Secular Planet--Planet Interactions

open access: yes, 2011
About 25 per cent of `hot Jupiters' (extrasolar Jovian-mass planets with close-in orbits) are actually orbiting counter to the spin direction of the star.
AA Zdziarski   +31 more
core   +1 more source

Extrasolar Binary Planets I: Formation by tidal capture during planet-planet scattering [PDF]

open access: yes, 2014
We have investigated i) the formation of gravitationally bounded pairs of gas-giant planets (which we call "binary planets") from capturing each other through planet-planet dynamical tide during their close encounters and ii) the following long-term orbital evolution due to planet-planet and planet-star {\it quasi-static} tides.
arxiv   +1 more source

A new climate for human nature? Navigating social theory through postnature, the anthropocene and posthumanism [PDF]

open access: yesFilozofija i Društvo
By examining debates on the Anthropocene era ignited by new materialist and posthumanist scholarship, this paper aims to discern how these perspectives can reframe the human-nature nexus.
Janković Stefan
doaj   +1 more source

Emerging Sensor Platforms Allow for Seagrass Extent Mapping in a Turbid Estuary and from the Meadow to Ecosystem Scale

open access: yesRemote Sensing, 2021
Seagrass meadows are globally important habitats, protecting shorelines, providing nursery areas for fish, and sequestering carbon. However, both anthropogenic and natural environmental stressors have led to a worldwide reduction seagrass habitats.
Johannes R. Krause   +3 more
doaj   +1 more source

Detection Probability of a Low-Mass Planet for Triple Lens Events: Implication of Properties of Binary-Lens Superposition

open access: yes, 2010
In view of the assumption that any planetary system is likely to be composed of more than one planet, and the multiple planet system with a large mass planet has more chance of detailed follow-up observations, the multiple planet system may be an ...
Beaulieu   +46 more
core   +1 more source

Combining LiDAR and Spaceborne Multispectral Data for Mapping Successional Forest Stages in Subtropical Forests

open access: yesRemote Sensing
The Brazilian Atlantic Rainforest presents great diversity of flora and stand structures, making it difficult for traditional forest inventories to collect reliable and recurrent information to classify forest succession stages.
Bill Herbert Ziegelmaier Neto   +5 more
doaj   +1 more source

The Astrobiology of Alien Worlds: Known and Unknown Forms of Life

open access: yesUniverse, 2020
Most definitions of life assume that, at a minimum, life is a physical form of matter distinct from its environment at a lower state of entropy than its surroundings, using energy from the environment for internal maintenance and activity, and capable of
Louis N. Irwin, Dirk Schulze-Makuch
doaj   +1 more source

The Mg/Fe ratio of silicate minerals in the meteoritic materials and in the circumstellar environment: A case study for the chondritic-like composition

open access: yesOpen Astronomy, 2021
Kaba meteorite as a reference material (one of a least metamorphosed and most primitive carbonaceous chondrites fell on Earth) was chosen for this study providing an adequate background for study of the protoplanetary disk or even the crystallization ...
Futó Péter   +9 more
doaj   +1 more source

Dynamical stability of the Gliese 581 exoplanetary system [PDF]

open access: yes, 2014
Using numerical methods we investigate the dynamical stability of the Gliese 581 exoplanetary system. The system is known to harbour four planets (b-e).
Nagy, Imre, Tóth, Zsuzsanna
core   +2 more sources

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