Results 71 to 80 of about 36,413 (332)

Defining the Really Habitable Zone

, 2020
Since the discovery of the first confirmed exoplanet, observations have revealed a remarkable diversity of worlds. A wide variety of orbital and physical characteristics are detected in the exoplanet population, and much work has been devoted to deciding which of these planets may be suitable for life. Until now, though, little work has been devoted to
Pedbost, Marven F., Pomalgu, Trillean, Lintott, Chris, Eisner, Nora, Nicholson, Belinda   +4 more
openaire   +2 more sources

Neuroanatomical diversity in Teleocichla with new volumetric and histological insights into the encephalon of Teleocichla monogramma Kullander 1988

The Anatomical Record, EarlyView.
Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis, Keila Xavier Magalhães, Thiago Nilton A. Pereira, Janice Muriel‐Cunha, Alberto Akama   +4 more
wiley   +1 more source

Tidal Limits to Planetary Habitability

, 2009
The habitable zones of main sequence stars have traditionally been defined as the range of orbits that intercept the appropriate amount of stellar flux to permit surface water on a planet. Terrestrial exoplanets discovered to orbit M stars in these zones,
Barnes, Barnes, Barnes, Brian Jackson, Butler, Davies, Dickey, Ferraz-Mello, Gaidos, Gounelle, Hut, Ikoma, Jackson, Jackson, Kuchner, Lammer, Mardling, Mayor, McEwen, Raymond, Raymond, Richard Greenberg, Rory Barnes, Sean N. Raymond, Segura, Spiegel, West, Winn, Yoder   +28 more
core   +2 more sources

HABITABLE ZONES AROUND MAIN-SEQUENCE STARS: NEW ESTIMATES [PDF]

The Astrophysical Journal, 2013
Identifying terrestrial planets in the habitable zones (HZs) of other stars is one of the primary goals of ongoing radial velocity and transit exoplanet surveys and proposed future space missions. Most current estimates of the boundaries of the HZ are based on 1-D, cloud-free, climate model calculations by Kasting et al.(1993). The inner edge of the HZ
Kopparapu, R. K., Ramirez, R., Kasting, J. F., Eymet, V., Robinson, T. D., Mahadevan, S., Terrien, R. C., Domagal-Goldman, S., Meadows, V., Deshpande, R.   +19 more
openaire   +2 more sources

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Planetary Habitability Under the Light of a Rapidly Changing Star

The Astronomical Journal
Planetary atmospheric energy budgets primarily depend on stellar incident flux. However, stellar variability can have major consequences for the evolution of planetary climates. In this work, we evaluate how stellar variability influences the equilibrium
Tara Fetherolf, Sadie G. Welter, Colby M. Ostberg, Stephen R. Kane, Rory Barnes, Emilie R. Simpson   +5 more
doaj   +1 more source

Design Considerations for a Ground-based Transit Search for Habitable Planets Orbiting M dwarfs

, 2008
By targeting nearby M dwarfs, a transit search using modest equipment is capable of discovering planets as small as 2 Earth radii in the habitable zones of their host stars.
Baraffe I., David Charbonneau, Delfosse X., Mink D. J., Philip Nutzman   +4 more
core   +1 more source

RoSETZ: Roman Survey of the Earth Transit Zone -- a SETI-optimized survey for habitable-zone exoplanets [PDF]

, 2023
E. Kerins, Supachai Awiphan, K. Edmondson, M. A. Garrett, Jacob Haqq‐Misra, René Heller, Macy Huston, David Kipping, Ravi Kopparapu, Danny C. Price, Andrew Siemion, Siddhant Sharma Evan L. Sneed, H. Socas‐Navarro, Robert F. Wilson, Jason T. Wright   +14 more
openalex   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

Tides Tighten the Hycean Habitable Zone

The Astrophysical Journal Letters
Hycean planets—exoplanets with substantial water ice layers, deep surface oceans, and hydrogen-rich atmospheres—are thought to be favorable environments for life. Due to a relative paucity of atmospheric greenhouse gases, hycean planets have been thought
Joseph R. Livesey, Juliette Becker, Susanna L. Widicus Weaver   +2 more
doaj   +1 more source