There is interest in the role of ammonia on Saturn's moons Titan and Enceladus as the presence of water, methane, and ammonia under temperature and pressure conditions of the surface and interior make these moons rich environments for the study of phases formed by these materials. Ammonia is known to form solid hemi-, mono-, and dihydrate crystal phases under conditions consistent with the surf...

We examine the impact of population distribution on fertility in a nationally representative sample. We exploit detailed life-history data to conduct an event-history analysis of transition to first birth, examining mechanisms that might link migration and fertility: socialization, adaptation, selection, and disruption. Our multivariate analysis examines various socio-demographic traits, the pl...

Although the two moons of Mars, Phobos and Deimos, have long been thought to be captured asteroids, recent observations of their compositions and orbits suggest that they may have formed from debris generated by one or more giant impacts of bodies with $0.01Â target mass. Recent studies have both analytically estimated debris produced by giant impacts on Mars and numerically examined the evolut...

Cardiovascular disease is the leading cause of morbidity and mortality for patients with type 2 diabetes mellitus (T2DM), accounting for two thirds of patient deaths. In addition to traditional cardiovascular risk factors, hyperglycemia and multiple other factors associated with T2DM such as obesity, insulin resistance, and inflammation play significant roles in cardiovascular disease risk.1 Pa...

Moons orbiting rocky exoplanets in compact orbits about other stars experience an accelerated tidal evolution, and can either merge with their parent planet or reach the limit of dynamical instability within a Hubble time. We review parameter space over which moons become unbound, including effects atmospheric tides on planetary spin. find that such change final outcome from merger to escape, a...

Daniel Aaronson is an economist and Daniel G. Sullivan is a senior economist and vice president at the Federal Reserve Bank of Chicago. The authors would like to thank Ann Ferris for her very capable assistance.

Abstract The 27 satellites of Uranus are enigmatic, with dark surfaces coated by material that could be rich in organics. Voyager 2 imaged the southern hemispheres Uranus’s five largest “classical” moons—Miranda, Ariel, Umbriel, Titania, and Oberon, as well ring moon, Puck—but their northern were largely unobservable at time flyby not imaged. Additionally, no spatially resolved data sets exist ...

Introduction: The satellites of Saturn less than 150 km radius occupy several dynamical niches: within rings (Pan, Daphnis, Atlas, Prometheus, Pandora), Coorbiting (Janus and Epimetheus), orbiting among faint rings or in ring arcs (Aegaeon, Methone, Anthe, Pallene) [1], and populating libration regions of larger moons (Telesto, Calypso, Polydeuces, and Helene). Hyperion orbits between Titan and...