Results 91 to 100 of about 473,596 (201)

A Terrestrial Planet in a ~1 AU Orbit Around One Member of a ~15 AU Binary

, 2014
We detect a cold, terrestrial planet in a binary-star system using gravitational microlensing. The planet has low mass (2 Earth masses) and lies projected at $a_{\perp,ph}$ ~ 0.8 astronomical units (AU) from its host star, similar to the Earth-Sun ...
Abe, F., Albrow, M., Bennett, D. P., Bond, I. A., Botzler, C. S., Choi, J. -Y., Christie, G. W., DePoy, D. L., Drummond, J., Freeman, M., Friedmann, M., Fukui, A., Fukunaga, D., Gaudi, B. S., Gould, A., Han, C., Hwang, K. -H., Itow, Y., Jung, Y. K., Kaspi, S., Koshimoto, N., Kozłowski, S., Kubiak, M., Larsen, P., Lee, C. -U., Ling, C. H., Maoz, D., Masuda, K., Matsubara, Y., McCormick, J., Mróz, P., Muraki, Y., Namba, S., Natusch, T., Ngan, H., Ohnishi, K., Park, H., Philpott, L., Pietrukowicz, P., Pietrzyński, G., Pogge, R. W., Poleski, R., Porritt, I., Rattenbury, N. J., Saito, To., Shin, I. -G., Shvartzvald, Y., Skowron, J., Soszyński, I., Sullivan, D. J., Sumi, T., Suzuki, D., Szymański, M. K., Tan, T. -G., Tristram, P. J., Tsurumi, N., Udalski, A., Ulaczyk, K., Wada, K., Wyrzykowski, Ł., Yamai, N., Yee, J. C., Yock, P. C. M., Yonehara, A.   +63 more
core   +1 more source

The HARPS search for southern extra-solar planets XXXII. Only 4 planets in the Gl~581 system [PDF]

, 2011
The Gl 581 planetary system has generated wide interest, because its 4 planets include both the lowest mass planet known around a main sequence star other than the Sun and the first super-Earth planet in the habitable zone of its star.
Almenara, J. M., Alonso, R., Bonfils, X., Bouchy, F., Deeg, H., Delfosse, X., Forveille, T., Gillon, M., Lovis, C., Mayor, M., Neves, V., Pepe, F., Queloz, D., Rabus, M., Santos, N. C., Segransan, D., Udry, S.   +16 more
core  

Observations of Extrasolar Planets Enabled by a Return to the Moon [PDF]

arXiv, 2007
Ambitious studies of Earth-like extrasolar planets are outlined in the context of an exploration initiative for a return to the Earth's Moon. Two mechanism for linearly polarizing light reflected from Earth-like planets are discussed: 1) Rayleigh-scattering from a planet's clear atmosphere, and 2) specular reflection from a planet's ocean.
arxiv  

Transit least-squares survey -- II. Discovery and validation of 17 new sub- to super-Earth-sized planets in multi-planet systems from K2

, 2019
The extended Kepler mission (K2) has revealed more than 500 transiting planets in roughly 500,000 stellar light curves. All of these were found either with the box least-squares algorithm or by visual inspection. Here we use our new transit least-squares
Heller, René, Hippke, Michael, Rodenbeck, Kai   +2 more
core   +1 more source

A unifying principle for global greenness patterns and trends

Communications Earth & Environment
Vegetation cover regulates the exchanges of energy, water and carbon between land and atmosphere. Remotely-sensed fractional absorbed photosynthetically active radiation (fAPAR), a land-surface greenness measure, depends on carbon allocation to foliage ...
Wenjia Cai, Ziqi Zhu, Sandy P. Harrison, Youngryel Ryu, Han Wang, Boya Zhou, Iain Colin Prentice   +6 more
doaj   +1 more source

Modelos del planeta Tierra en escolares rurales de Chile / Planet Earth models about students in rural schools from Chile [PDF]

Liberabit, 2015
RESUMEN El presente estudio tuvo como objetivo identificar los modelos del planeta Tierra en escolares mapuches y no mapuches de procedencia rural. Los participantes fueron 40 escolares distribuidos en dos grupos de edad, quienes respondieron a una tarea
Paula Alonqueo Boudon, Alfonso Llancaqueo Henríquez, Carolina Flores Millanao, Aylin Lienlaf Tragolaf   +3 more
doaj  

A near-earth optical communications terminal with a corevolving planetary sun shield [PDF]

The umbra of a planet may serve as a sun shield for a space based optical communications terminal or for a space based astronomical observatory. An orbit that keeps the terminal or observatory within the umbra is desirable.
Kerr, E. L.
core   +1 more source

The contribution of secondary eclipses as astrophysical false positives to exoplanet transit surveys

, 2013
We investigate in this paper the astrophysical false-positive configuration in exoplanet-transit surveys that involves eclipsing binaries and giant planets which present only a secondary eclipse, as seen from the Earth.
Almenara, J. -M., Díaz, R. F., Figueira, P., Fressin, F., Santerne, A., Santos, N. C.   +5 more
core   +3 more sources

Reflections on the past and future of whole Earth system science

Global Sustainability
Non-technical Summary With unabating climate extremes, evidence of waning biosphere buffering capacity, and surging ocean surface temperature, Earth system analysts are posing the question: is global environmental change accelerating, driven by the ...
Johan Rockström
doaj   +1 more source

Risk and planet earth

International Journal of Digital Earth, 2011
Risk and planet earth, by A. Dolemeyer, J. Zimmer and G. Tetzlaff, Stuttgart, Germany, Schweizerbart Science Publishers, 2010, 110 pp., €29.80 (hardback), ISBN 978-3-510-65260-0 This book was publi...
openaire   +2 more sources