Archive for July, 2013

Zuluaga J.I., Ferrína, I, and Geens, S., 2013, arXiv:1303.1796 The orbit of the Chelyabinsk event impactor as reconstructed from amateur and public footage The Chelyabinsk meteor is the most important impact event after the Tunguska event, almost 100 years before. The object that entered Earth on February 15, 2013, was a small-sized Apollo asteroid (with […]

Mousis O., et al., 2013, arXiv:1305.3647 Instrumental Methods for Professional and Amateur Collaborations in Planetary Astronomy This is a great collective work on various professional-amateur collaborations (written by both professionals and amateurs) regarding aspects of Planetary Astronomy, such as: terrestial planets (Mercury, Venus, Mars), gaseous planets (Jupiter, Saturn, Uranus, Poseidon), interstellar dust (meteoroids, meteors, fireballs, […]

! LaTeX Error: Too many unprocessed floats. This error in LaTeX means that it is unable to handle more than a specific number of figures and tables (yes, there is a limit!  no more than roughly 30). Unless you want to replot and combine figures an easy solution is to add the package ‘morefloats’: \usepackage{morefloats} […]

Total number of stars

By grigoris | Filed in Astronomy

3 X 1023 are the possible number of stars in the universe ! ( a number equivalent to the total number of human cells, as mentioned by Conroy) (source, based on Pieter G. van Dokkum & Charlie Conroy, 2010, Nature, 468,940–942)

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How to comment a block of text without inserting the ‘#’ character to all lines? We just use a ‘<<COMMENT_STRING’ (COMMENT_STRING can be obviously whatever we want) before the line of text we want to comment out and ‘COMMENT_STRING’ after the last line. An example: <<HEADER_COMMENT This is a test comment – lol! HEADER_COMMENT [source1,source2] […]

Used in a Perl script so I noted now because I will totally forget how to use it! use List::Util qw(shuffle) my @coef = (-2..2); my @random_coef = shuffle @coef; Thanks to Alexandros M. for this tip!

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