largest in the solar system objects (diameter). Less than the diameter of Neptune in Uranus, but its large mass ratio. Neptune is the farthest solar system gas giant planets. Its equatorial diameter is 49,500 km. If Neptune is hollow, it can accommodate nearly 60 Earth.Neptune's year is...
Based on the observed number of ecliptic comets, the number of comets in the Kuiper belt between 30 and 50 AU has been estimated at ∼109 objects larger than 1 km diameter, with a roughly equal number in the scattered disk. Current studies suggest that the Kuiper belt has been collision...
Table 1 Orders of magnitude of some dimensionless parameters in the main sequence phase of the Sun in the bulk of convection zone and in a core convection zone of a\(20~M_{\odot}\)O9 star. Typical values from current global 3D simulations of stellar convection and dynamos are listed in...
Axions or axion-like particles can be generated by the misalignment mechanism40,41,42, or the decay of topological objects43,44 during the early Universe. The couplings between dark photon or axions and SM particles provide important tools in searching for these ultralight particles. Various types...
The type and size of particles will affect the sunlight reflection characteristics of a single particle as calculated by Scattering Cross Section Theory (SCE). Zinc oxide (ZnO) particles with a diameter in the range of 0.1~1 μm have a strong scattering effect in the solar visible and near-...
Additional moons have been discovered to be orbiting around asteroids and trans-Neptunian objects. solarsystem.nasa.gov do not include moons of Haumea (2), Makemake (1), Eris (1), dwarf planets that have not been visited yet by any spacecraft to gather precise information about them. Of ...
83. These searches assume that the ultralight particles are either DM or sourced inside the astrophysical objects. Remarkably, the Sun, being our closest star, offers a good laboratory for probing ultralight particles. Previous works have set constraints on ultralight particles generated inside the ...
Determining the quantity of energy that the PHES system can store was the target of our study. The procedures listed below can be used to estimate the pump power of water required to determine the quantity of electrical energy that can be converted into potential energy in high-elevation storage...
silicon wafer, and (G) current-voltage characteristic of solar cell with efficiency of 5.7% and short-circuit current density of 19.55 mA/cm2, where the inset illustrates the flexibility of the device, by sticking it on a copper foil tap which is wrapped on a 6-mm diameter glass rod. Th...
M5 is at a pupil image and provides the fast tip-tilt compensation for the AO system. The system was manufactured by Physik Instrumente. The mirror itself is made from light-weight SiC. Both M5 and M6 have a diameter of 275 mm. As described in Sections 4.8 and 5 the optical design ...