Category Archives: astronomy

The Importance Of Morning And Evening Star Sights

Part 1 – Checking to see which stars and planets will be above the observer’s horizon during Nautical Twilight on a certain day. By Jack Case Introduction. The Astronomical Position Line.  A position line is a line drawn on a … Continue reading

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Stars For All Seasons Part 6

Winter Stars in the Northern Hemisphere “Know The Stars And You Will Always Have A Compass”.    (Michael Punk. 2002. The Revenant)   As we move into winter, new constellations take their place in the night sky of the northern hemisphere … Continue reading

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Stars For All Seasons Part 5

Autumn Stars in the Northern Hemisphere Spring Stars in the Southern Hemisphere.   During early autumn in the northern hemisphere, as the Earth continues to orbit the Sun, the last of the summer stars such as Altair, Vego, Deneb, Nunki … Continue reading

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Stars For All Seasons Part 4

Circumpolar Stars In The Southern Hemisphere. In the previous article of this series, we discussed circumpolar stars of the Northern Hemisphere and  in this article we will look at some of the circumpolar constellations in the Southern Hemisphere. Centaurus is the … Continue reading

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Stars For All Seasons – Part 3

Circumpolar Stars “Know The Stars And You Will Always Have A Compass”.    (Michael Punk. 2002. The Revenant). In article one of this series this article, we briefly touched on the topic of circumpolar stars and here we continue with that … Continue reading

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Stars For All Seasons – Part 2

Summer Stars in the Northern Hemisphere  Winter Stars in the Southern Hemisphere “Know The Stars And You Will Always Have A Compass”.    (Michael Punk. 2002. The Revenant) In the last article, we discussed Rotation (the reason the stars seem to rise … Continue reading

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Stars For All Seasons Part 1

Often asked questions: Why do the stars seem to rise earlier each night?  Why do the stars that we see in the night sky change from season to season?  There are two separate reasons for these phenomena, Rotation and Revolution. … Continue reading

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In Defence of Mer Pas

The noon sight for latitude is a method of calculating latitude from the altitude of the sun at the instant it crosses your meridian and for this reason, the method is also known as ‘Meridian Passage’ or ‘Mer. Pas’.  I … Continue reading

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Celestial Navigation – Theory and Practice

I have received a number of messages asking why my book ‘Celestial Navigation – The Ultimate Course’ is not currently available.  The truth is that I have been spending the winter months revising and updating this book and it will … Continue reading

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Astro Navigation in the Forests of the Iroquois

Link: History of the Mason Dixon line Jeremiah Dixon and Charles Mason plotted the famous Mason Dixon Line in 1765, long before the days of GPS or any other electronic navigation equipment. How was it then that they were they able … Continue reading

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