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Meteorites are often studied as part of cosmochemistry. Cosmochemistry (from Ancient Greek κόσμος (kósmos) 'universe' and χημεία (khēmeía) 'chemistry') or chemical cosmology is the study of the chemical composition of matter in the universe and the processes that led to those compositions. [1]
Computer generated cut-away view of ALICE showing the 18 detectors of the experiment. ALICE is designed to study high-energy collisions between lead nuclei.These collisions mimic the extreme temperature and energy density that would have been found in the fractions of a second after the Big Bang by forming a quark–gluon plasma, a state of matter in which quarks and gluons are unbound.
A Miyake event is an observed sharp enhancement of the production of cosmogenic isotopes by cosmic rays. It can be marked by a spike in the concentration of radioactive carbon isotope 14 C in tree rings, as well as 10 Be and 36 Cl in ice cores, which are all independently dated.
In China, there is only one clear reference to an aurora in the mid-770s, on 12 January 776. [11] [12] However, an anomalous "thunderstorm" was recorded for 775.[13]As established by Ilya G. Usoskin and colleagues, [14] the current scientific paradigm [15] is that the event was caused by a solar particle event (SPE) from a very strong solar flare, perhaps the strongest known. [16]
RELIKT-1, a Soviet cosmic microwave background anisotropy experiment on board the Prognoz 9 satellite (launched 1 July 1983), gave the first upper limits on the large-scale anisotropy. [33]: 8.5.3.2 The other key event in the 1980s was the proposal by Alan Guth for cosmic inflation. This theory of rapid spatial expansion gave an explanation for ...
This is the standard approach to perturbation theory of general relativity for cosmology. [10] This approach is widely used for the computation of anisotropies in the cosmic microwave background radiation [ 11 ] as part of the physical cosmology program and focuses on predictions arising from linearisations that preserve gauge invariance with ...
Cl produced by cosmic rays originating from the Sun when large solar flares or eruptions occur. Although the event was initially proposed to be a signature of an unidentified supernova, [2] it was soon independently confirmed and proven to be the discovery of an extreme solar particle event. [3] [4] The measurements utilised the 14
This is a list of the largest cosmic structures so far discovered. The unit of measurement used is the light-year (distance traveled by light in one Julian year; approximately 9.46 trillion kilometres). This list includes superclusters, galaxy filaments and large quasar groups (LQGs). The structures are listed based on their longest dimension.