![]() In January 2004, asteroid 2001 DA 42 was given the permanent name 25924 Douglasadams, for the author Douglas Adams who popularized the number 42.The New General Catalogue object NGC 42, a spiral galaxy in the constellation Pegasus.Messier object M42, a magnitude 5.0 diffuse nebula in the constellation Orion, also known as the Orion Nebula.The ASCII code 42 is for the asterisk symbol, being a wildcard for everything.The password expiration policy for a Microsoft Windows domain defaults to 42 days.Tiling a plane using regular hexagons, which is honeycomb in appearance, is approximated in a topological sense to an accuracy of better than 1% using a stretcher bond brick pattern with bricks of 42 squares (6 by 7).The GNU C Library, a set of standard routines available for use in computer programming, contains a function- memfrob()-which performs an XOR combination of a given variable and the binary pattern 00101010 (42) as an XOR cipher.In the military IRIG 106 Chapter 10 data recording standard, the hex value 0x464F52545974776F (ASCII "FORTYtwo") is used as a magic number to identify directory blocks.In the reiser4 file system, 42 is the inode number of the root directory.In TIFF (Tagged Image File Format), the second 16-bit word of every file is 42, "an arbitrary but carefully chosen number that further identifies the file as a TIFF file".These powers range from 10 25 meters to 10 −17 meters. In Powers of Ten by Ray and Charles Eames, the known universe from large-scale to small-scale is represented by 42 different powers of ten.The hypothetical efficiency of converting mass to energy, as per E=mc², by having a given mass orbit a rotating black hole is 42%, the highest efficiency yet known to modern physics.As determined by the Babylonians, in 79 years Mars orbits the Sun almost exactly 42 times.) Now we know that is inaccurate, and it only would take about 38 minutes. ![]() ![]() (The same idea was proposed, without calculation by Lewis Carroll in 1893 in Sylvie and Bruno Concluded. Even if the tube does not pass through the exact center of the Earth, the time for a journey powered entirely by gravity (known as a gravity train) always works out to be 42 minutes, so long as the tube remains friction-free, as while the force of gravity would be lessened, the distance traveled is reduced at an equal rate. The time for such a journey works out to be 42 minutes. The first half of the journey consists of free-fall acceleration, while the second half consists of an exactly equal deceleration. In 1966, mathematician Paul Cooper theorized that the fastest, most efficient way to travel across continents would be to bore a straight hollow tube directly through the Earth, connecting a set of antipodes, remove the air from the tube and fall through.The angle rounded to whole degrees for which a rainbow appears (the critical angle).42 is the atomic mass of one of the naturally occurring stable isotopes of calcium.42 is also ten factorial divided by the number of seconds in a day (i.e.42 is the number of ways to arrange the numbers 1 to 9 in a 3x3 matrix such that the numbers in each row and column are in ascending order.42 is a Harshad number in base 10, because the sum of the digits 4 and 2 is 6 (4 + 2 = 6), and 42 is divisible by 6.6.1 The Hitchhiker's Guide to the Galaxyįorty-two (42) is a pronic number and an abundant number its prime factorization ( 2 × 3 × 7.
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