Schumann resonances are electromagnetic waves that resonate in the cavity that is naturally formed between the conductive planetary surface and lower ionosphere, containing the atmosphere….
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As soon as lunar basalts became available for study, it was recognized from the absence of hydrated minerals from them, and the presence of metallic…
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All classes of meteorites are derived from unique parent bodies. With the exception of lunar and martian meteorites, which originate from differentiated planets, these parent…
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Ordinary chondrites are rocks that originate from asteroids. They are called ‘ordinary’ as they comprise about 85% of all meteorites that were found on the…
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When Sedna was discovered in 2003 it was regarded by many as an outlier, nothing else like it was known in the Solar System. Fifteen…
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The Sun can emit intense bursts of high-energy particles that can fill a large volume of the heliosphere and last several days. The largest of…
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It is well-known that galaxies rotate so fast that centrifugal forces should have long ago beaten the gravitational self-attraction of all the visible mass we…
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When small (about 10 meters or 33 feet) near-Earth asteroid (NEA) 1991 VG was discovered in 1991, it was the first one of its kind and…
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General Relativity is, currently, the best theory to explain gravitational phenomena. Published by Albert Einstein in 1915, the theory found agreement with known astronomical observations,…
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Asteroids are celestial bodies much smaller than planets. They have irregular shapes and very weak gravity fields. Space missions around an asteroid can be challenging…
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When a spacecraft performs a manoeuver called flyby, in which it comes along a hyperbolic trajectory towards the Earth or other planets, something strange happens….
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