Jupiter: Cosmic Jekyll and Hyde.

  title={Jupiter: Cosmic Jekyll and Hyde.},
  author={Kevin R. Grazier},
  volume={16 1},
  • K. Grazier
  • Published 2016
  • Physics, Medicine
  • Astrobiology
It has been widely reported that Jupiter has a profound role in shielding the terrestrial planets from comet impacts in the Solar System, and that a jovian planet is a requirement for the evolution of life on Earth. To evaluate whether jovians, in fact, shield habitable planets from impacts (a phenomenon often referred to as the "Jupiter as shield" concept), this study simulated the evolution of 10,000 particles in each of the jovian inter-planet gaps for the cases of full-mass and embryo… Expand
The influence of Jupiter, Mars and Venus on Earth’sorbital evolution
Summary: In the coming years, it is likely that the first potentially Earth-like planets will be discovered orbiting other stars. Once found, the characterisation of those planets will play a vitalExpand
Quantifying the Influence of Jupiter on the Earth’s Orbital Cycles
The results highlight how dynamical simulations of newly discovered exoplanetary systems could be used as an additional means to assess the potential targets of biosignature searches, and thereby help focus the search for life to the most promising targets. Expand
Prospecting for exo-Earths in multiple planet systems with a gas giant
In this work, we hunt for the best places to find exo-Earths in the currently known exoplanet population. While it is still unclear whether Jupiter had a beneficial or detrimental effect on theExpand
Cool Jupiters greatly outnumber their toasty siblings: occurrence rates from the Anglo-Australian Planet Search
Our understanding of planetary systems different to our own has grown dramatically in the past 30 yr. However, our efforts to ascertain the degree to which the Solar system is abnormal or unique haveExpand
The Relationship between Centaurs and Jupiter Family Comets with Implications for K-Pg-type Impacts
Centaurs—icy bodies orbiting beyond Jupiter and interior to Neptune—are believed to be dynamically related to Jupiter Family Comets (JFCs), which have aphelia near Jupiter's orbit, and perihelia inExpand
Properties of the single Jovian planet population and the pursuit of solar system analogues
While the number of exoplanets discovered continues to increase at a rapid rate, we are still to discover any system that truly resembles the Solar system. Existing and near future surveys willExpand
Stable habitable zones of single Jovian planet systems
With continued improvement in telescope sensitivity and observational techniques, the search for rocky planets in stellar habitable zones is entering an exciting era. With so many exoplanetaryExpand
Is Earth special?
Abstract Peculiar conditions may be required for the origin of life and/or the evolution of complex organisms. Hence, Earth attributes—such as plate-tectonics, oceans, magnetism and a large moon—mayExpand
It’s Complicated: A Big Data Approach to Exploring Planetesimal Evolution in the Presence of Jovian Planets
Previous studies have suggested that the scattered disk is populated by planetesimals that once orbited in the reservoirs between the Jovian planets. Other studies have concluded that the sourceExpand
Resilient habitability of nearby exoplanet systems
We investigate the possibility of finding Earth-like planets in the habitable zone of 34 nearby FGK-dwarfs, each known to host one giant planet exterior to their habitable zone detected by RV. FirstExpand


Jupiter – friend or foe? II: the Centaurs
Abstract It has long been assumed that the planet Jupiter acts as a giant shield, significantly lowering the impact rate of minor bodies upon the Earth, and thus enabling the development andExpand
Jupiter – friend or foe? I: The asteroids
Abstract The asteroids are a major source of potential impactors on the Earth today. It has long been assumed that the giant planet Jupiter acts as a shield, significantly lowering the impact rate onExpand
Jupiter – friend or foe? III: the Oort cloud comets
Abstract It has long been assumed that the planet Jupiter acts as a giant shield, significantly lowering the impact rate of minor bodies on Earth. However, until recently, very little work had beenExpand
Possible consequences of absence of “jupiters” in planetary systems
  • G. Wetherill
  • Physics, Medicine
  • Astrophysics and space science
  • 1994
The formation of the gas giant planets Jupiter and Saturn probably required the growth of massive ∼ 15 Earth-mass cores on a time scale shorter than the ∼ 107 time scale for removal of nebular gas, but the probability of similar gas giants occurring in other planetary systems is unclear. Expand
Jupiter: friend or foe?
Jonti Horner and Barrie W Jones re-examine the role of giant planets in the evolution of life – specifically, whether Jupiter has in fact shielded Earth from excessive extraterrestrial bombardment.Expand
Jupiter – friend or foe? IV: the influence of orbital eccentricity and inclination
Abstract For many years, it has been assumed that Jupiter has prevented the Earth from being subject to a punishing impact regime that would have greatly hindered the development of life. Here, weExpand
Origin of the cataclysmic Late Heavy Bombardment period of the terrestrial planets
This model not only naturally explains the Late Heavy Bombardment, but also reproduces the observational constraints of the outer Solar System. Expand
Evolution of Jovian planets in a self-gravitating planetesimal disk
Aims. We explore the orbital evolution of the four Jovian planets embedded in a self-gravitating planetesimal disk, along with the simultaneous accretion of small bodies by proto-Uranus andExpand
Dynamical Evolution of Planetesimals in the Outer Solar System: I. The Jupiter/Saturn Zone
Abstract We report on numerical simulations designed to understand the distribution of small bodies in the Solar System and the winnowing of planetesimals accreted from the early solar nebula. TheExpand
A low mass for Mars from Jupiter’s early gas-driven migration
Simulation of the early Solar System shows how the inward migration of Jupiter to 1.5 au, and its subsequent outward migration, lead to a planetesimal disk truncated at 1’au; the terrestrial planets then form from this disk over the next 30–50 million years, with an Earth/Mars mass ratio consistent with observations. Expand