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A light-year, alternatively spelled light year (ly or lyr [3]), is a unit of length used to express astronomical distances and is equal to exactly 9 460 730 472 580.8 km, which is approximately 5.88 trillion mi.
This is a list of star systems within 75–80 light years of Earth. The closest B-type star, Regulus , is in this list. This list is incomplete ; you can help by adding missing items .
Adragon De Mello (born October 8, 1976) is an American prodigy who graduated from the University of California, Santa Cruz with a degree in computational mathematics in 1988, at age 11. At the time, he was the youngest college graduate in U.S. history, a record that was later broken in 1994 by Michael Kearney .
This is a list of star systems within 450–500 light years of Earth. [1] [2] [3] This list is incomplete; you can help by adding missing items. (July 2024)
thus more than 0.999999998 times the speed of light. This value was obtained by comparing the arrival times of light and neutrinos. The difference of approximately three hours was explained by the circumstance, that the almost noninteracting neutrinos could pass the supernova unhindered while light required a longer time. [7] [8] [9] [10]
Based on the hit game show franchise Are You Smarter Than a 5th Grader? which first aired in 2007, this trivia challenge brings the fun of the show right to your next party. ... How many days are ...
Porphyrion is a Fanaroff–Riley class II radio galaxy located 7.5 billion light years away from Earth, with host galaxy J152932.16+601534.4.It is located in the constellation Draco and it was discovered in Low-Frequency Array (LOFAR) data by an international team led by Martijn Oei. [2]
Youngest or middle siblings may beg to differ, but this study of 250,000 Norwegian 18- and 19-year-olds published in Science magazine revealed they had an average IQ 2.3 points higher than their ...