Astronomical Phenomena
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Picture of Astronomical Phenomena for 2019 This small, useful booklet contains general interest material preprinted from The Astronomical Almanac. It is published jointly by the U.S. Naval Observatory and Her Majesty's Nautical Almanac Office two years in advance of its date. It includes such things as:

Starting with the 2015 edition, users may download Astronomical Phenomena free of charge, although the booklet is still available for purchase through the Government Printing Office. It is available as a navigable PDF.

Editions of Astronomical Phenomena Available for Download
Year Title Link File Size
2019 ap19_for_web.pdf 16 MBytes
2018 ap18_for_web.pdf 7.3 MBytes
2017 ap17_for_web.pdf 7.4 MBytes
2016 ap16_for_web.pdf 11.3 MBytes
2015 ap15_for_web.pdf 10.2 MBytes

Some links of interest for Astronomical Phenomena: