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Relative to calcium, both strontium and barium are markedly enriched in Earth's continental crust compared to the basaltic crusts of other differentiated rocky bodies within the solar system. Here, we both re-examine available archived Keck…

Earth and Planetary Astrophysics · Physics 2015-06-22 M. Jura , B. Klein , S. Xu , E. D. Young

Impacts may have had a significant effect on the atmospheric chemistry of the early Earth. Reduced phases in the impactor (e.g., metallic iron) can reduce the planet's H$_2$O inventory to produce massive atmospheres rich in H$_2$. Whilst…

Earth and Planetary Astrophysics · Physics 2022-05-25 J. P. Itcovitz , A. S. P. Rae , R. I. Citron , S. T. Stewart , C. A. Sinclair , P. B. Rimmer , O. Shorttle

Large satellite constellations are one of the main reasons for an increasing amount of mass being brought into low Earth orbit in recent years. After end of life, the satellites, as well as rocket stages, reenter Earth's atmosphere. This…

We review the current state of data mining and machine learning in astronomy. 'Data Mining' can have a somewhat mixed connotation from the point of view of a researcher in this field. If used correctly, it can be a powerful approach,…

Instrumentation and Methods for Astrophysics · Physics 2010-08-11 Nicholas M. Ball , Robert J. Brunner

The locations of the fully despun, double synchronous end states of tidal evolution are derived for spherical components. With the exception of nearly equal-mass binaries, binary asteroid systems are in the midst of lengthy tidal…

Earth and Planetary Astrophysics · Physics 2015-03-18 Patrick A. Taylor , Jean-Luc Margot

The asteroid belt is the leftover of the original planetesimal population in the inner solar system. However, currently the asteroids have orbits with all possible values of eccentricities and inclinations compatible with long-term…

Earth and Planetary Astrophysics · Physics 2016-08-31 Alessandro Morbidelli , Kevin J. Walsh , David P. O'Brien , David A. Minton , William F. Bottke

Collisions are one of the key processes shaping planetary systems. Asteroid families are outcomes of such collisions still identifiable across our solar system. The families provide a unique view of catastrophic disruption phenomena and…

Earth and Planetary Astrophysics · Physics 2022-07-25 Bojan Novakovic , David Vokrouhlicky , Federica Spoto , David Nesvorny

Three of the seven rocky planets (e, f, and g) in TRAPPIST-1 system orbit in the habitable zone of the host star. Therefore, water can be in liquid state at their surface being essential for life. Recent studies suggest that these planets…

Earth and Planetary Astrophysics · Physics 2019-06-05 Zoltán Dencs , Zsolt Regály

We determine the possible detection rate of asteroids with the Bering mission. In particular we examine the outcome of the Bering mission in relation to the populations of Near-Earth Asteroids and main belt asteroids. This is done by…

Astrophysics · Physics 2007-05-23 Rene Michelsen , Henning Haack , Anja C. Andersen , John L. Joergensen

Planets like the Earth cannot form unless elements heavier than helium are available. These heavy elements, or `metals', were not produced in the big bang. They result from fusion inside stars and have been gradually building up over the…

Astrophysics · Physics 2009-10-31 Charles H. Lineweaver

We provide a generalized discussion of tidal evolution to arbitrary order in the expansion of the gravitational potential between two spherical bodies of any mass ratio. To accurately reproduce the tidal evolution of a system at separations…

Earth and Planetary Astrophysics · Physics 2015-03-17 Patrick A. Taylor , Jean-Luc Margot

Global warming is one of the problems of human civilization and decarbonization policy is the main solution to this problem. In this work, we propose using the gravity-assist by the asteroids to increase the orbital distance of the Earth…

Earth and Planetary Astrophysics · Physics 2022-02-11 Sohrab Rahvar

By plotting empirical chemical element abundances on Earth relative to the Sun and normalized to silicon versus their first ionization potentials, we confirm the existence of a correlation reported earlier. To explain this, we develop a…

Earth and Planetary Astrophysics · Physics 2022-01-20 Herve Toulhoat , Viacheslav Zgonnik

Late accretion onto the Hadean Earth included large impacts that could have influenced early habitability, either by sterilizing the planet or alternatively catalyzing the origin of life by delivering iron required to create a reducing…

Earth and Planetary Astrophysics · Physics 2022-01-25 Robert I. Citron , Sarah T. Stewart

Exoplanet surveys around M dwarfs have detected a growing number of exoplanets with Earth-like insolation. It is expected that some of those planets are rocky planets with the potential for temperate climates favourable to surface liquid…

Earth and Planetary Astrophysics · Physics 2022-09-30 Tadahiro Kimura , Masahiro Ikoma

Asteroids and other Small Solar System Bodies (SSSBs) are of high general and scientific interest in many aspects. The origin, formation, and evolution of our Solar System (and other planetary systems) can be better understood by analysing…

To-date, all human economic activity has depended on the resources of a single planet, and it has long been recognized that developments in space exploration could in principle open our closed planetary economy to external resources of…

Earth and Planetary Astrophysics · Physics 2016-08-03 Ian A. Crawford , Martin Elvis , James Carpenter

Containing only a few percent the mass of the moon, the current asteroid belt is around three to four orders of magnitude smaller that its primordial mass inferred from disk models. Yet dynamical studies have shown that the asteroid belt…

Earth and Planetary Astrophysics · Physics 2019-01-16 Matthew S. Clement , Sean N. Raymond , Nathan A. Kaib

Hydrated minerals are tracers of early solar system history, and have been proposed as a possible focus for economic activity in space. Near-Earth objects (NEOs) are important to both of these, especially the most accessible members of that…

Earth and Planetary Astrophysics · Physics 2018-12-07 Andrew S. Rivkin , Francesca E. DeMeo

Many asteroids show indications they have undergone impacts with meteoroid particles having radii between 0.01 m and 1 m. During such impacts, small dust grains will be ejected at the impact site. The possibility of these dust grains (with…

Space Physics · Physics 2009-11-10 R. Nazzario , T. W. Hyde , L. Barge
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