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Early attempts to explain the discrepancy proposed that the models of the Sun were wrong, i.e. the temperature and pressure in the interior of the Sun were substantially different from what was believed. For example, since neutrinos measure the amount of current nuclear fusion, it was suggested that the nuclear processes in the core of the Sun ...
In this framework, the early Sun underwent an extended period of higher solar wind output. Based on exoplanetary data, this caused a mass loss from the Sun of 5−6 percent over its lifetime, [27] resulting in a more consistent level of solar luminosity (as the early Sun had more mass, resulting in more energy output than was predicted).
A clue containing a comparative or superlative always has an answer in the same degree (e.g., [Most difficult] for TOUGHEST). [6] The answer word(s) will not appear in the clue itself. The number of words in the answer is not given in the clue—so a one-word clue can have a multiple-word answer. [28]
Aristarchus of Samos (/ ˌ æ r ə ˈ s t ɑːr k ə s /; Ancient Greek: Ἀρίσταρχος ὁ Σάμιος, Aristarkhos ho Samios; c. 310 – c. 230 BC) was an ancient Greek astronomer and mathematician who presented the first known heliocentric model that placed the Sun at the center of the universe, with the Earth revolving around the Sun once a year and rotating about its axis once a day.
Patrick D. Berry (born 1970) is an American puzzle creator and editor who constructs crossword puzzles and variety puzzles. He had 227 crosswords published in The New York Times from 1999 to 2018. His how-to guide for crossword construction was first published as a For Dummies book in 2004.
An American-style 15×15 crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one ...
The following is a list of notable unsolved problems grouped into broad areas of physics. [1]Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result.
Upon very close examination of navigational data, the spacecraft were found to be slowing slightly more than expected. The effect is an extremely small acceleration towards the Sun, of (8.74 ± 1.33) × 10 −10 m/s 2, which is equivalent to a reduction of the outbound velocity by 1 km/h over a period of ten years. The two spacecraft were ...