Core accretion theory lacks an explanation for the formation of the gas giants in the outer solar system due to the amount of time the process takes. In contrast, the pebble accretion model falls short of explaining the formation of the terrestrial planets due to a lack of building material ...
Use and misuse of extinct and long-lived radioactivities to reconstruct the early hystory of the Solar System In the recent years, with the progress of experimental technics in Isotope Geology, the use of extinct radioactivities to reconstruct the early Solar Syste... CJ Allegre,G Manhes,MA ...
Adopting a distance ofD = 16.8 Mpc and a black hole mass ofM = 6.5 × 109M☉(whereM☉is the solar mass)4, this angular diameter translates to a diameter of[Math Processing Error]8.4−1.1+0.5Schwarzschild radii (Rs = 2GM/c2, whereGis the gravitational constant,M...
To prevent potential anthropic contamination due to activities at the station, samples of snow were extracted in trenches with depths larger than 2 m, corresponding to years prior to 1995, which is the beginning of human presence in that area. The trenches were located several hundreds of meters...
In the solar system and perhaps beyond, when many aspects are considered, Earth is a unique planet. Often called the twin planet to Earth because of its close proximity, its comparable radius/size, and its similar mass and density, the atmosphere of Venus is very different from that of ...
Among them, only 13 were identified to be powered by AGNs, through radio diagnoses, e.g., the compact point-like morphologies and the excess radio emissions compared with those afforded by star-forming activities. This yields an AGN rate of 11% in radio-active dwarf galaxies. Only one of...