Results 91 to 100 of about 131,482 (278)

Thermochemical equilibrium calculations of high-temperature O2 generation on the early Earth: Giant asteroid impact on land [PDF]

Journal of the Serbian Chemical Society, 2003
Earth’s atmosphere is composed primarily of N2 and O2. The origin of free O2 in the early Earth’s atmosphere is still subject of considerable debate.1 Theoretical models suggest that the initial form of free O2 in the atmosphere has been oceanic H2O ...
Premović Pavle I.
doaj   +1 more source

The Network State, Exit, and the Political Economy of Venture Capital

Antipode, EarlyView.
Abstract This article focuses on the Network State movement as embodying the venture capital (VC) logic of exit. Exit constitutes both a strategy for lucrative returns and an ideology seeking out new territories for financial and technological speculation.
Olivier Jutel
wiley   +1 more source

Spitzer Observations of Spacecraft Target 162173 (1999 JU3)

, 2009
Near-Earth asteroid 162173 (1999 JU3) is the primary target of the Hayabusa-2 sample return mission, and a potential target of the Marco Polo sample return mission. Earth-based studies of this object are fundamental to these missions.
A. Barucci, Binzel, Bottke, Delbó, Delbó, E. Dotto, H. Campins, Harris, Hasegawa, Houck, J. Licandro, J. P. Emery, Kelley, Lebofsky, M. Delbó, M. Kelley, Müller, Vilas, Werner, Y. Fernández   +19 more
core   +2 more sources

The operational environment and rotational acceleration of asteroid (101955) Bennu from OSIRIS-REx observations

Nature Communications, 2019
During its approach to asteroid (101955) Bennu, NASA’s Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) spacecraft surveyed Bennu’s immediate environment, photometric properties, and rotation state ...
C. Hergenrother, C. Maleszewski, M. Nolan, J.-Y. Li, C. D. Drouet d’Aubigny, F. Shelly, E. Howell, T. Kareta, M. Izawa, M. Barucci, E. Bierhaus, H. Campins, S. Chesley, B. Clark, E. Christensen, D. DellaGiustina, S. Fornasier, D. Golish, C. Hartzell, B. Rizk, D. Scheeres, P. H. Smith, X. Zou, D. Lauretta, D. E. J. D. N. E. E. K. L. T. C. R. A. S. D. T. S. A. Highsmith Small Vokrouhlický Bowles Brown Donaldso, D. Highsmith, J. Small, D. Vokrouhlický, N. Bowles, E. Brown, K. D. Donaldson Hanna, T. Warren, C. Brunet, R. Chicoine, S. Desjardins, D. Gaudreau, T. Haltigin, S. Millington-Veloza, A. Rubi, J. Aponte, N. Gorius, A. Lunsford, B. Allen, J. Grindlay, D. Guevel, D. Hoak, J. Hong, D. Schrader, J. Bayron, O. Golubov, P. Sánchez, J. Stromberg, M. Hirabayashi, S. Oliver, M. Rascon, A. Harch, J. Joseph, S. Squyres, D. Richardson, J. Emery, L. McGraw, R. Ghent, R. Binzel, M. A. Al Asad, C. Johnson, L. Philpott, H. Susorney, E. Cloutis, R. Hanna, H. Connolly, F. Ciceri, A. Hildebrand, E.-M. Ibrahim, L. Breitenfeld, T. Glotch, A. Rogers, B. Clark, S. Ferrone, C. Thomas, Y. Fernández, W. Chang, A. Cheuvront, D. Trang, S. Tachibana, H. Yurimoto, J. Brucato, G. Poggiali, M. Pajola, E. Dotto, E. Epifani, M. K. Crombie, C. Lantz, M. Izawa, J. de León, J. Licandro, Jolai R. Garcia, S. Clemett, K. Thomas-Keprta, S. Van wal, M. Yoshikawa, J. Bellerose, S. Bhaskaran, C. Boyles, C. Elder, D. Farnocchia, A. Harbison, B. Kennedy, A. Knight, N. Martinez-Vlasoff, N. Mastrodemos, T. McElrath, W. Owen, R. Park, B. Rush, L. Swanson, Y. Takahashi, D. Velez, K. Yetter, C. Thayer, C. Adam, P. Antreasian, J. Bauman, C. Bryan, B. Carcich, M. Corvin, J. Geeraert, J. Hoffman, J. Leonard, E. Lessac-Chenen, A. Levine, J. McAdams, L. McCarthy, D. Nelson, B. Page, J. Pelgrift, E. Sahr, K. Stakkestad, D. Stanbridge, D. Wibben, B. Williams, K. Williams, P. Wolff, P. Hayne, D. Kubitschek, M. Barucci, J. Deshapriya, S. Fornasier, M. Fulchignoni, P. Hasselmann, F. Merlin, A. Praet, O. Billett, A. Boggs, B. Buck, S. Carlson-Kelly, J. Cerna, K. Chaffin, E. Church, M. Coltrin, J. Daly, A. Deguzman, R. Dubisher, D. Eckart, D. Ellis, P. Falkenstern, A. Fisher, M. Fisher, P. Fleming, K. Fortney, S. Francis, S. Freund, S. Gonzales, P. Haas, A. Hasten, D. Hauf, A. Hilbert, D. Howell, F. Jaén, N. Jayakody, M. Jenkins, K. Johnson, M. Lefèvre, H. Ma, C. Mario, K. Martin, C. May, M. McGee, B. Miller, C. Miller, G. Miller, A. Mirfakhrai, E. Muhle, C. Norman, R. Olds, C. Parish, M. Ryle, M. Schmitzer, P. Sherman, M. Skeen, M. Šušak, B. Sutter, Q. Tran, C. Welch, R. Witherspoon, J. Wood, J. Zareski, M. Arvizu-Jakubicki, E. Asphaug, E. Audi, R. Ballouz, R. Bandrowski, K. Becker, T. Becker, S. Bendall, C. Bennett, H. Bloomenthal, D. Blum, W. Boynton, J. Brodbeck, K. Burke, M. Chojnacki, A. Colpo, J. Contreras, J. Cutts, D. Dean, B. Diallo, D. Drinnon, K. Drozd, H. Enos, R. Enos, C. Fellows, T. Ferro, M. R. Fisher, G. Fitzgibbon, M. Fitzgibbon, J. Forelli, T. Forrester, I. Galinsky, R. Garcia, A. Gardner, D. Golish, N. Habib, D. Hamara, D. Hammond, K. Hanley, K. Harshman, C. Hergenrother, K. Herzog, D. Hill, C. Hoekenga, S. Hooven, E. Huettner, A. Janakus, J. Jones, T. Kareta, J. Kidd, K. Kingsbury, S. Balram-Knutson, L. Koelbel, J. Kreiner, D. Lambert, D. Lauretta, C. Lewin, B. Lovelace, M. Loveridge, M. Lujan, R. Malhotra, K. Marchese, E. Mcdonough, N. Mogk, V. Morrison, E. Morton, R. Munoz, J. Nelson, M. Nolan, J. Padilla, R. Pennington, A. Polit, N. Ramos, V. Reddy, M. Riehl, H. L. Roper, S. Salazar, S. Schwartz, S. Selznick, N. Shultz, S. Stewart, S. Sutton, T. Swindle, Y. Tang, M. Westermann, C. Wolner, D. Worden, T. Zega, Z. Zeszut, A. Bjurstrom, L. Bloomquist, C. Dickinson, E. Keates, J. Liang, V. Nifo, A. Taylor, F. Teti, M. Caplinger, H. Bowles, S. Carter, S. Dickenshied, D. Doerres, T. Fisher, W. Hagee, J. Hill, M. Miner, D. Noss, N. Piacentine, M. Smith, A. Toland, P. Wren, M. Bernacki, D. P. Muñoz, S.-i. Watanabe, S. Sandford, A. Aqueche, B. Ashman, M. Barker, A. Bartels, K. Berry, B. Bos, R. Burns, A. Calloway, R. Carpenter, N. Castro, R. Cosentino, J. Donaldson, J. Dworkin, J. E. Cook, C. Emr, D. Everett, D. Fennell, K. Fleshman, D. Folta, D. Gallagher, J. Garvin, K. Getzandanner, D. Glavin, S. Hull, K. Hyde, H. Ido, A. Ingegneri, N. Jones, P. Kaotira, L. Lim, A. Liounis, C. Lorentson, D. Lorenz, J. Lyzhoft, E. Mazarico, R. Mink, W. Moore, M. Moreau, S. Mullen, J. Nagy, G. Neumann, J. Nuth, D. Poland, D. Reuter, L. Rhoads, S. Rieger, D. Rowlands, D. Sallitt, A. Scroggins, G. Shaw, A. Simon, J. Swenson, P. Vasudeva, M. Wasser, R. Zellar, J. Grossman, G. Johnston, M. Morris, J. Wendel, A. Burton, L. Keller, L. McNamara, S. Messenger, K. Nakamura-Messenger, A. Nguyen, K. Righter, E. Queen, K. Bellamy, K. Dill, S. Gardner, M. Giuntini, B. Key, J. Kissell, D. Patterson, D. Vaughan, B. Wright, R. Gaskell, L. Le Corre, J.-Y. Li, J. Molaro, E. Palmer, M. Siegler, P. Tricarico, J. Weirich, T. Ireland, K. Tait, P. Bland, S. Anwar, N. Bojorquez-Murphy, P. R. Christensen, C. Haberle, G. Mehall, K. Rios, I. Franchi, B. Rozitis, C. Beddingfield, J. Marshall, D. Brack, A. French, J. McMahon, E. Jawin, T. Mccoy, S. Russell, M. Killgore, W. Bottke, V. Hamilton, H. Kaplan, K. Walsh, J. Bandfield, B. C. Clark, M. Chodas, M. Lambert, R. Masterson, M. Daly, J. Freemantle, J. Seabrook, O. Barnouin, K. Craft, R. Daly, C. Ernst, R. Espiritu, M. Holdridge, M. Jones, A. H. Nair, L. Nguyen, J. Peachey, M. Perry, J. Plescia, J. H. Roberts, R. Steele, R. Turner, J. Backer, K. Edmundson, J. Mapel, M. Milazzo, S. Sides, C. Manzoni, B. May, M. Delbo’, G. Libourel, P. Michel, A. Ryan, F. Thuillet, B. Marty   +464 more
semanticscholar   +1 more source

AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec [PDF]

Nippon Tenmon Gakkai obun kenkyu hokoku, 2018
Knowledge of water in the solar system is important for understanding of a wide range of evolutionary processes and the thermal history of the solar system.
F. Usui, S. Hasegawa, T. Ootsubo, T. Onaka   +3 more
semanticscholar   +1 more source

Expelled by the Antarctic ice: Evolutionary history of the tribe Cunonieae (Cunoniaceae)

Journal of Systematics and Evolution, EarlyView.
Multiple fossil calibration points reveal recent radiations and biogeographical history of the Cunonieae tribe. The most densely sampled phylogeny allowed to infer Antarctica and Patagonia as areas of origin, confirming the reestablishment of Pterophylla and revealing the northward movement of Weinmannia into the tropical Andes. Conflicting plastid and
Francisco Fajardo‐Gutiérrez, Mariasole Calbi, Markus S. Dillenberger, Sebastian Tello, Alfredo Fuentes, Nora H. Oleas, Ricardo A. Segovia, Christine E. Edwards, Yohan Pillon, James E. Richardson, Thomas Borsch   +10 more
wiley   +1 more source

Immersion and Invariance Based Adaptive Backstepping Control for Body-Fixed Hovering Over an Asteroid

IEEE Access, 2019
An adaptive control law is proposed in this paper for body-fixed hovering over an asteroid with an unknown gravity field and an unknown rotation rate. The unknown parameters and irregular shape of an asteroid make the hovering problem challenging.
Bo Zhang, Yuanli Cai
doaj   +1 more source

Optical observations of NEA 162173 (1999 JU3) during the 2011-2012 apparition

, 2013
Near-Earth asteroid 162173 (1999 JU3) is a potential target of two asteroid sample return missions, not only because of its accessibility but also because of the first C-type asteroid for exploration missions.
Byun, Y. -I., Choi, Y. -J., Ishiguro, M., Kaplan, M., Kim, M. -J., Kuroda, D., Moon, H. -K., Mottola, S., Takahashi, J., Warjurkar, D. S.   +9 more
core   +1 more source

Images from the surface of asteroid Ryugu show rocks similar to carbonaceous chondrite meteorites

Science, 2019
Landing on the surface of Ryugu In October 2018, the Hayabusa2 spacecraft dropped the Mobile Asteroid Surface Scout (MASCOT) lander onto the surface of the asteroid (162173) Ryugu. Jaumann et al.
R. Jaumann, R. Jaumann, N. Schmitz, T. Ho, Stefan Schröder, K. Otto, Katrin Stephan, S. Elgner, K. Krohn, F. Preusker, F. Scholten, J. Biele, S. Ulamec, C. Krause, S. Sugita, K. Matz, T. Roatsch, R. Parekh, R. Parekh, S. Mottola, M. Grott, Patrick Michel, F. Trauthan, A. Koncz, H. Michaelis, C. Lange, J. Grundmann, M. Maibaum, K. Sasaki, Friederike Wolff, Josef Reill, A. Moussi-Soffys, L. Lorda, Wladimir Neumann, J. Vincent, Roland Wagner, J. Bibring, S. Kameda, H. Yano, Sei‐ichiro Watanabe, Sei‐ichiro Watanabe, M. Yoshikawa, Y. Tsuda, T. Okada, T. Yoshimitsu, Y. Mimasu, T. Saiki, H. Yabuta, H. Rauer, H. Rauer, R. Honda, T. Morota, Y. Yokota, T. Kouyama   +53 more
semanticscholar   +1 more source

The nature and formation of silica minerals in eucrite meteorites: Insight into the protoplanetary magma crystallization

Meteoritics &Planetary Science, EarlyView.
Abstract Silica polymorphs in meteorites provide critical constraints on crystallization processes associated with thermal activity in the early solar system. A detailed investigation of silica polymorphs in eucrites (the largest group of achondrites) using cathodoluminescence imaging and laser‐Raman spectroscopy revealed significant variations in the ...
Rei Kanemaru, Akira Yamaguchi, Naoya Imae, Ryoga Maeda, Makoto Kimura, Kenji Horie, Takashi Mikouchi, Masaaki Miyahara, Masahiro Yasutake, Atsushi Takenouchi, Haruka Ono, Aiko Nakato, Junko Isa, Tomohiro Usui, Hirotsugu Nishido   +14 more
wiley   +1 more source