Results 51 to 60 of about 465,389 (352)

Terrestrial planet formation constrained by Mars and the structure of the asteroid belt [PDF]

, 2015
Reproducing the large Earth/Mars mass ratio requires a strong mass depletion in solids within the protoplanetary disc between 1 and 3 au. The Grand Tack model invokes a specific migration history of the giant planets to remove most of the mass initially ...
A. Izidoro, S. Raymond, A. Morbidelli, O. Winter   +3 more
semanticscholar   +1 more source

WARM DEBRIS DISKS PRODUCED BY GIANT IMPACTS DURING TERRESTRIAL PLANET FORMATION [PDF]

, 2015
In our solar system, Mars-sized protoplanets frequently collided with each other during the last stage of terrestrial planet formation, called the giant impact stage. Giant impacts eject a large amount of material from the colliding protoplanets into the
H. Genda, H. Kobayashi, E. Kokubo
semanticscholar   +1 more source

Formation of telluric planets and the origin of terrestrial water

BIO Web of Conferences, 2014
Simulations of planet formation have failed to reproduce Mars’ small mass (compared with Earth) for 20 years. Here I will present a solution to the Mars problem that invokes large-scale migration of Jupiter and Saturn while they were still embedded in ...
Raymond Sean
doaj   +1 more source

The atmospheres of the terrestrial planets

Geophysical Surveys, 1985
It has been known since the end of the nineteenth century that the Earth’s nearest planetary neighbours, Venus and Mars, have extensive atmospheres. However, the nature of these atmospheres was not at all well understood until the advent of planetary missions by robot probes, beginning with Mariner 2 which encountered Venus in December 1962. Since then,
openaire   +3 more sources

The detailed chemical composition of the terrestrial planet host Kepler-10 [PDF]

, 2015
Chemical abundance studies of the Sun and solar twins have demonstrated that the solar composition of refractory elements is depleted when compared to volatile elements, which could be due to the formation of terrestrial planets.
Fan Liu, D. Yong, M. Asplund, I. Ramírez, J. Meléndez, B. Gustafsson, L. Howes, L. Howes, I. Roederer, D. Lambert, T. Bensby   +10 more
semanticscholar   +1 more source

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source

A terrestrial planet in a ~1-AU orbit around one member of a ∼15-AU binary [PDF]

Science, 2014
Impolite planet ignores host's partner Many known exoplanets (planets outside our own solar system) are hosted by binary systems that contain two stars. These planets normally circle around both of their stars.
A. Gould, A. Udalski, I. Shin, I. Porritt, J. Skowron, C. Han, J. Yee, S. Kozłowski, J.-Y. Choi, R. Poleski, Ł. Wyrzykowski, K. Ulaczyk, P. Pietrukowicz, P. Mróz, M. Szymański, M. Kubiak, I. Soszyński, G. Pietrzyński, B. Gaudi, G. Christie, Jack D. Drummond, J. Mccormick, T. Natusch, H. Ngan, Thiam-Guan Tan, M. Albrow, D. DePoy, K. Hwang, Y. Jung, C.‐U. Lee, H. Park, R. Pogge, F. Abe, D. Bennett, I. Bond, C. Botzler, M. Freeman, A. Fukui, D. Fukunaga, Y. Itow, N. Koshimoto, P. Larsen, C. Ling, K. Masuda, Y. Matsubara, Y. Muraki, S. Namba, K. Ohnishi, L. Philpott, N. Rattenbury, T. Saito, D. Sullivan, T. Sumi, D. Suzuki, P. Tristram, N. Tsurumi, K. Wada, N. Yamai, P. Yock, A. Yonehara, Y. Shvartzvald, D. Maoz, S. Kaspi, M. Friedmann   +63 more
semanticscholar   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Are There Terrestrial Planets Lurking in the Outer Solar System?

The Astrophysical Journal Letters, 2023
Motivated by recent measurements of the free-floating-planet mass function at terrestrial masses, we consider the possibility that the solar system may have captured a terrestrial planet early in its history.
Amir Siraj
doaj   +1 more source

NUMERICALLY PREDICTED INDIRECT SIGNATURES OF TERRESTRIAL PLANET FORMATION [PDF]

, 2015
The intermediate phases of planet formation are not directly observable due to lack of emission from planetesimals. Planet formation is, however, a dynamically active process resulting in collisions between the evolving planetesimals and the production ...
Z. Leinhardt, J. Dobinson, P. Carter, S. Lines   +3 more
semanticscholar   +1 more source