Results 11 to 20 of about 1,124,972 (291)

Asteroid resource map for near-Earth space [PDF]

open access: yes, 2011
Most future concepts for the exploration and exploitation of space require a large initial mass in low Earth orbit. Delivering this required mass from the Earth’s surface increases cost due to the large energy input necessary to move mass out of the ...
Sanchez Cuartielles, Joan-Pau   +1 more
core   +5 more sources

Life at the end of worlds : modelling the biosignatures of microbial life in diverse environments at the end of the habitable lifetimes of Earth-like planets [PDF]

open access: yes, 2014
This thesis investigates how increased global mean temperatures on Earth, induced by the increase in the luminosity of the Sun as it ages, change the types of habitable environments on the planet at local scales over the next 3 Gyr.
O'Malley-James, Jack T.
core   +2 more sources

Planet Texas 2050 Statement on Black Lives Matter and Racial Injustice [PDF]

open access: yes, 2020
You are viewing an article about Planet Texas 2050 in 2020.Office of the VP for ...
UT Austin, Planet Texas 2050
core   +1 more source

A Transiting Super-Earth in the Radius Valley and an Outer Planet Candidate Around HD 307842 [PDF]

open access: yes, 2023
We report the confirmation of a TESS-discovered transiting super-Earth planet orbiting a mid-G star, HD 307842 (TOI-784). The planet has a period of 2.8 days, and the radial velocity (RV) measurements constrain the mass to be 9.67 ? 0.82 + 0.83 M ? .
Stassun, Keivan G.   +16 more
core   +1 more source

A Habitable-zone Earth-sized Planet Rescued from False Positive Status [PDF]

open access: yes, 2020
We report the discovery of an Earth-sized planet in the habitable zone of a low-mass star called Kepler-1649. The planet, Kepler-1649 c, is 1.06+0.15 -0.10 times the size of Earth and transits its 0.1977 ± 0.0051 M⊙mid M-dwarf host star every 19.5 days ...
Vanderburg, Andrew   +11 more
core   +1 more source

Mathematical models and methods for planet Earth [PDF]

open access: yes, 2013
In 2013 several scientific activities have been devoted to mathematical researches for the study of planet Earth. The current volume presents a selection of the highly topical issues presented at the workshop “Mathematical Models and Methods for Planet ...
Locatelli, Ugo   +7 more
core   +1 more source

On the interaction between embedded planets and the corotation region of protoplanetary discs [PDF]

open access: yes, 2015
PhDDisc material in the corotation region librates with respect to low-mass planets on horseshoe trajectories. The exchange of angular momentum associated with this libration gives rise to the non-linear corotation torque (the horseshoe drag).
Fendyke, Stephen
core   +4 more sources

Palaeoenvironmental signatures revealed from rare earth element (REE) compositions of vertebrate microremains of the Vesiku Bone Bed (Homerian, Wenlock), Saaremaa Island, Estonia [PDF]

open access: yes, 2015
The Estonian Journal of Earth Sciences is an open access journal and applies the Creative Commons Attribution 4.0 International License CC BY to all its papers (http://creativecommons.org/licenses/by/4.0/).
Alberto Pérez-Huerta   +13 more
core   +2 more sources

A Terrain-Corrected Vegetation Index Strategy for Improving Leaf Area Index Estimation in Mountainous Areas

open access: yesRemote Sensing
Leaf Area Index (LAI) is an important biophysical parameter in studies of regional and global ecosystems. However, terrain-induced distortion of surface reflectance can reduce the reliability of vegetation indices (VIs) in characterizing the canopy ...
Haier Liu   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy