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On the Possibility of Measuring Solar Flattening from Photometry Measurements Taken during Solar Eclipses Seen from the Earth’s Surface or Earth Orbit
Solar oblateness is a key parameter that provides a strong constraint for understanding the variations in total solar irradiance as well as the...
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A radius valley between migrated steam worlds and evaporated rocky cores
The radius valley (or gap) in the observed distribution of exoplanet radii, which separates smaller super-Earths from larger sub-Neptunes, is a key...
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Solar Wind or Solar Breeze?
Long before the advent of research enabled by rockets, scientists speculated about the physical processes external to stars. That is, in addition to...
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The study of angular distance distribution to the solar flares during different solar cycles
The angular distance of the solar flares to the projective point of the center of the solar disk on the solar spherical surface has been studied by...
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ICARUS: in-situ studies of the solar corona beyond Parker Solar Probe and Solar Orbiter
The primary scientific goal of ICARUS (Investigation of Coronal AcceleRation and heating of solar wind Up to the Sun), a mother-daughter satellite...
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Solar Activity in the Last 20 Years and a Forecast of the 25th Solar Cycle
AbstractExperimental data on solar activity (sunspot number, induction of solar polar magnetic field B p , and others), characteristics of...
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Helio-latitude Dependence of the Solar Wind Parameters and the Magneto-Gravitational Dragging of the Solar Wind
A theoretical model of the magnetic-field coupling to the background gravitational field of a rotating Sun-like star is used here to calculate the...
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Photometric Flattening Index of the Solar Corona in the Solar Cycle
AbstractThe photometric flattening index as a quantitative characteristic of the shape of the solar corona observed during a total solar eclipse was...
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Solar Wind and Space Weather
Hot coronal plasma cannot be confined by the gravitational field of the Sun and gradually flows out into interplanetary space, forming the solar...
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The Coronal Flattening Index at the 20 April 2023 Total Solar Eclipse and the Prediction of Solar Cycle 25
The Ludendorff coronal flattening index is a quantitative parameter to analyze the global structure and shape of the corona. This index plays a...
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Helium-enhanced planets along the upper edge of the radius valley
The Kepler survey revealed that the radius distribution of sub-Neptunes is bimodal: there is a scarcity of planets between 1.5 and 2.0 R ⊕ . However,...
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Parker Solar Probe: Four Years of Discoveries at Solar Cycle Minimum
Launched on 12 Aug. 2018, NASA’s Parker Solar Probe had completed 13 of its scheduled 24 orbits around the Sun by Nov. 2022. The mission’s primary...
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Organic Solar Cells
While organic solar cell research has progressed over the previous three decades, the recent decade has seen a surge in scientific and commercial...
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Comparison of I-ICME and M-ICME Fittings and In Situ Observation Parameters for Solar Cycles 23 and 24 and Their Influence on Geoeffectiveness
To understand the weaker geomagnetic activity in Solar Cycle 24, we present comparisons of interplanetary coronal mass ejections (ICMEs) fittings and...
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Design of a high-efficiency perovskite solar cell based on photonic crystal in the absorption layer
Perovskite solar cells (PSCs) have gained a lot of attention due to their high power conversion efficiency (PCE), low-cost materials, and simple...
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Solar Activity
Before proceeding to the description of the phenomena of solar activity (SA), it is necessary at least briefly to get acquainted with the structure...
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The accretion of a solar mass per day by a 17-billion solar mass black hole
Around a million quasars have been catalogued in the Universe by probing deeper and using new methods for discovery. However, the hardest ones to...
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Solar Cosmic Ray Acceleration by a Shock Wave in the Lower Solar Corona on May 7, 1978
AbstractBased on the theory of diffusive shock acceleration of charged particles, we have theoretically studied the spectra of protons produced by a...
