Supporting amateur astronomers since 1890
The purpose of this paper is to bring to the attention of the amateur astronomical community the writer’s discovery of a previously unknown class of object, the significance of which does not appear to have been reported in amateur publications.
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Ole Rømer (1644−1710) is remembered today for establishing, from observations of eclipses of the Galilean satellites of Jupiter, that the velocity of light is finite. This paper describes the use of amateur timings of Galilean eclipses observed during 2012−’14 to recreate Rømer’s work, together with a theoretical investigation of the accuracy of such approaches for estimating the speed of light.
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Spectroscopy is now a practical possibility for amateur astronomers motivated to produce scientifically useful observations. The BAA is therefore launching
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As described in the previous Journal, Mercury will cross the Sun’s disk on Monday May 9. The timings for the
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Where does Mata Hari come into this? The famous exotic dancer and courtesan, executed as a German spy in 1917,
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The International Astronomical Youth Camp (IAYC) first began back in 1969. The camp was the first of its kind, with
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On Monday May 9 there will be a transit of Mercury across the Sun’s disk. This relatively rare phenomenon is
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This interim report of the 2015/2016 apparition of Neptune is based on observations made by Paul G. Abel (UK), Abdul
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In 2012 a satellite took a photograph of the USA at night. This image has become well known to Internet
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It is recognised that the equinoxes can produce more auroral activity than other times of the year. This has been
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