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Starting in the early 1960s, DC Comics maintained some aspects of its continuity through the use of a multiverse system of parallel Earths. A cosmic event in the 1985 limited series Crisis on Infinite Earths merged all of these realities and their respective characters into one universe, allowing writers to rewrite from scratch such long-running characters as Batman, Superman and Wonder Woman ...
The particle horizon differs from the cosmic event horizon, in that the particle horizon represents the largest comoving distance from which light could have reached the observer by a specific time, while the cosmic event horizon is the largest comoving distance from which light emitted now can ever reach the observer in the future. [3]
From about 9.8 billion years of cosmic time, [13] the universe's large-scale behavior is believed to have gradually changed for the third time in its history. Its behavior had originally been dominated by radiation (relativistic constituents such as photons and neutrinos) for the first 47,000 years, and since about 370,000 years of cosmic time ...
The 993–994 carbon-14 spike was one of only a few well-documented 14 C events. There had been a considerably larger one, the 774–775 carbon-14 spike, which was around 1.7 times as strong than the 993-994 event. [2] Both events also had subsequent 10 Be spikes, which further proves that they are from strong solar activity. [5]
This work is in the public domain in the Philippines and possibly other jurisdictions because it is a work created by an officer or employee of the Government of the Philippines or any of its subdivisions and instrumentalities, including government-owned and/or controlled corporations, as part of their regularly prescribed official duties ...
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Physical cosmology is a branch of cosmology concerned with the study of cosmological models. A cosmological model, or simply cosmology, provides a description of the largest-scale structures and dynamics of the universe and allows study of fundamental questions about its origin, structure, evolution, and ultimate fate. [1]
The Younger Dryas impact hypothesis (YDIH) proposes that the onset of the Younger Dryas (YD) cool period at the end of the Last Glacial Period, around 12,900 years ago was the result of some kind of cosmic event with specific details varying between publications. [1]: Sec 1 The hypothesis is widely rejected by relevant experts.