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A star prime is a star number that is prime. The first few star primes (sequence A083577 in the OEIS) are 13, 37, 73, 181, 337, 433, 541, 661, 937. A superstar prime is a star prime whose prime index is also a star number. The first two such numbers are 661 and 1750255921. A reverse superstar prime is a star number whose index is a star prime ...
The star also appears on notes that have a serial number higher than 99,999,999 because the number machines cannot print over eight digits. [ 2 ] In the US, the Bureau of Engraving and Printing inspects currency for printing errors prior to releasing notes into general circulation.
Computer scientists and mathematicians often vocalize it as star (as, for example, in the A* search algorithm or C*-algebra). An asterisk is usually five- or six-pointed in print and six- or eight-pointed when handwritten, though more complex forms exist.
A number following a comma is a scale between 1 and 9 based on the ratio of ZrO and TiO. A number following a slash is a more-recent but less-common scheme designed to represent the ratio of carbon to oxygen on a scale of 1 to 10, where a 0 would be an MS star. Intensities of zirconium and titanium may be indicated explicitly. Also occasionally ...
Older catalogues either assigned an arbitrary number to each object, or used a simple systematic naming scheme based on the constellation the star lies in, like the older Ptolemy's Almagest in Greek from 150 and Al-Sufi's Book of Fixed Stars in Arabic from 964. The variety of sky catalogues now in use means that most bright stars currently have ...
The Bright Star Catalogue, which is a star catalogue listing all stars of apparent magnitude 6.5 or brighter, or roughly every star visible to the naked eye from Earth, contains 9,096 stars. [1] The most voluminous modern catalogues list on the order of a billion stars, out of an estimated total of 200 to 400 billion in the Milky Way .
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73 as a star number (up to blue dots). 37 , its dual permutable prime , is the preceding consecutive star number (up to green dots). 73 and 37 are also consecutive star numbers , equivalently consecutive centered dodecagonal ( 12 -gonal) numbers (respectively the 4th and the 3rd). [ 2 ]