Results 111 to 120 of about 128,595 (322)

Terrestrial Planet Formation Constrained by Mars and the Structure of the Asteroid Belt

, 2015
Reproducing the large Earth/Mars mass ratio requires a strong mass depletion in solids within the protoplanetary disk 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 ...
Izidoro, André, Morbidelli, Alessandro, Raymond, Sean N., Winter, Othon C.   +3 more
core   +4 more sources

EURONEAR: Data mining of asteroids and Near Earth Asteroids [PDF]

Astronomische Nachrichten, 2009
AbstractBesides new observations, mining old photographic plates and CCD image archives represents an opportunity to recover and secure newly discovered asteroids, also to improve the orbits of Near Earth Asteroids (NEAs), Potentially Hazardous Asteroids (PHAs) and Virtual Impactors (VIs). These are the main research aims of the EURONEAR network.
Birlan, Mirel, Curelaru, L., Birlan, M., Vaduvescu, O., Curelaru, L., Serbanescu, L., Bocsa, G., Tudorica, A., Vaduvescu, O., Birlan, Mirel, Tudorica, A., Serbanescu, L., Berthier, J., Serbanescu, L., Berthier, J., Tudorica, A., Berthier, J., Bocsa, G., Birlan, M., Vaduvescu, O., Curelaru, L., Bocsa, G.   +21 more
openaire   +6 more sources

Past aridity and dust drove biodiversity crises and altered pollination in the ancient gymnosperm Ephedra (Gnetales)

Biological Reviews, EarlyView.
ABSTRACT The long‐term effects of present‐day climate change on pollination are unquantified. However, distinguishing climatic drivers of ancient changes in pollination could provide valuable insights into biotic responses to near‐future climate states.
Natasha Barbolini, Niels Meijer, Carina Hoorn, Guillaume Dupont‐Nivet, Fang Han, Ashley Krüger, Qin Yuan, Alexander Rohrmann, Kristina Bolinder, Catarina Rydin   +9 more
wiley   +1 more source

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

Secular evolution of asteroid families: the role of Ceres

, 2015
We consider the role of the dwarf planet Ceres on the secular dynamics of the asteroid main belt. Specifically, we examine the post impact evolution of asteroid families due to the interaction of their members with the linear nodal secular resonance with
Djosovic, Vladimir, Maro, Stefano, Maurel, Clara, Novakovic, Bojan, Tsirvoulis, Georgios   +4 more
core   +2 more sources

From Bednets to Rocket Ships: Efficiency in the Long‐Term and Neglect for the Present

Journal of Applied Philosophy, EarlyView.
ABSTRACT In this article I develop an objection to Longtermism – the view that concern for the long‐term future is a moral imperative – that is often gestured at, but not fleshed out. I call this the Far‐Future Priority Objection: Longtermism may entail significant resource reallocation and systemic neglect of the worst off today.
Elizabeth C. Hupfer
wiley   +1 more source

ASIME 2018 White Paper. In-Space Utilisation of Asteroids: Asteroid Composition -- Answers to Questions from the Asteroid Miners

, 2019
In keeping with the Luxembourg government's initiative to support the future use of space resources, ASIME 2018 was held in Belval, Luxembourg on April 16-17, 2018.
Abbud-Madrid, Angel, Abell, Paul, Barucci, Antonella, Beck, Pierre, Bonal, Lydie, Bonin, Grant, Borgersen, Øystein Risan, Britt, Daniel, Campins, Humberto, Cannon, Kevin, Carnelli, Ian, Carry, Benoît, Crawford, Ian, de Leon, Julia, Donaldson-Hanna, Kerri, Drube, Line, Elvis, Martin, Fitzsimmons, Alan, Galache, JL, Graps, Amara L., Green, Simon F., Grundmann, Jan Thimo, Herique, Alan, Hestroffer, Daniel, Hsieh, Henry, Kereszturi, Akos, Kueppers, Michael, Lewicki, Chris, Lin, Yangting, Mainzer, Amy, Michel, Patrick, Moon, Hong-Kyu, Nakamura, Tomoki, Penttila, Antti, Pursiainen, Sampsa, Raymond, Carol, Reddy, Vishnu, Rivkin, Andy, Sercel, Joel, Stickle, Angela, Takala, Mika, Tanga, Paolo, Wirtz, Tom, Wu, YunZhao   +43 more
core  

Asteroid deflection and exploitation : possible synergies [PDF]

, 2011
The asteroid and cometary impact hazard has long been recognised as an important issue requiring risk assessment and contingency planning. At the same time asteroids have also been acknowledged as possible sources of raw materials for future large-scale ...
McInnes, Colin, Sanchez Cuartielles, Joan-Pau   +1 more
core  

A primitive asteroid that lived fast and died young sampled by a xenolith in the Cold Bokkeveld CM2 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 464-483, March 2025.
Abstract Xenoliths in carbonaceous chondrites include lithologies that are unrepresented in the meteorite record and so are a rich source of information on asteroid diversity. Cold Bokkeveld is a CM2 regolith breccia that contains both hydrous and anhydrous lithic clasts. Here, we describe a hydrous clast with a fine‐grained rim.
Martin R. Lee, Cameron J. Floyd, Robin Haller, Sammy Griffin   +3 more
wiley   +1 more source

Space experiment on the “catching” of astromaterials in near space to search for extraterrestrial life

Вісник Астрономічної школи, 2018
Asteroids and cometary nuclei consist of the same primary substance as the gas-dust cloud from which the solar system was formed. Now this substance is being studied in the meteorite material that fell to the Earth's surface. NASA experts suggested after
A. P. Vidmachenko, A. F. Steklov
doaj   +1 more source