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The so-called long-duration gamma-ray bursts produce a total energy output of about 10 44 joules (as much energy as the Sun will produce in its entire life-time) but in a period of only 20 to 40 seconds. Gamma rays are approximately 50% of the total energy output.
The magnitude of the energy of cosmic ray flux in interstellar space is very comparable to that of other deep space energies: cosmic ray energy density averages about one electron-volt per cubic centimetre of interstellar space, or ≈1 eV/cm 3, which is comparable to the energy density of visible starlight at 0.3 eV/cm 3, the galactic magnetic ...
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Nearly 50% of childless adults under 50 aren’t likely to become parents, which is up from 37% in 2018. One expert described the trend as "the problem of the 21st century."
In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.
Stardust is a 2007 romantic fantasy adventure film directed by Matthew Vaughn and co-written by Vaughn and Jane Goldman.Based on Neil Gaiman's 1999 novel of the same name, it features an ensemble cast led by Claire Danes, Charlie Cox, Sienna Miller, Ricky Gervais, Jason Flemyng, Rupert Everett, Peter O'Toole, Michelle Pfeiffer, and Robert De Niro, with narration by Ian McKellen.