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 Venus Evening Star or Morning Star?
 The Retrograde and Prograde Motions of Mars and Jupiter
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 Planning Star and Planet Sights
 The Importance of Morning and Evening Star Sights – Part 2
 The Importance Of Morning And Evening Star Sights
 Stars For All Seasons Part 7 – Spring Stars in the Northern Hemisphere.
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 Astro Navigation Demystified
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Tag Archives: mathematics of celestial navigation
Calculating Azimuth And Altitude At The Assumed Position By Spherical Trigonometry.
There are several ways of calculating the azimuth and altitude at the assumed position; these include the use of sight reduction methods and software solutions. However, the traditional method is by the use of spherical trigonometry which is demonstrated below. … Continue reading →
The Relationship Between Longitude, Latitude and the Nautical Mile.
The Relationship Between Longitude and the Nautical Mile. The Earth’s equatorial circumference is 21640.6 n.m. Since the Equator is a great circle, 1o will subtend an arc of: 21640.6 ÷ 360 = 60.113 ≈ 60 n.m. There are 360 meridians of Longitude so … Continue reading →
Calculating the Sun’s Declination in a Survival Situation
In an ideal situation, we could find our latitude by using a satellite navigation system. If satnav is not available, we can use astro navigation to calculate our latitude by the method shown at the following links: Latitude from the … Continue reading →
Posted in astro navigation, Survival

Tagged amazon, astro navigation, astronomy, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, navigation, survival, survival  navigation

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Planning Star and Planet Observations
I have been asked about using ABC tables to calculate azimuth and altitude when planning star and planet observations. Unlike the Sun and the Moon which are easily identified, the approximate positions of stars and planets need to be established … Continue reading →
Posted in astro navigation

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, Planning star and planet observations, Rapid Sight Reduction, star and planet observations

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Astro Navigation In A Survival Situation
In a recent survey, the majority of people questioned were surprised to learn that astro navigation can be used in a survival situation. In the same survey, 60% said that they would use satellite navigation systems to find their way … Continue reading →
Posted in Astro Navigation Topics, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, survival, survival  astro navigation, survival  navigation

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Finding Latititude In A Survival Situation.
The full method of calculating your latitude from the altitude of the Sun can be found at this link. However, in a survival situation, the following simplified method can be used. Equipment Needed. A clinometer or other device for measuring angles. … Continue reading →
Posted in Astro Navigation Topics, navigation, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, survival, survival  astro navigation, survival  navigation

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Astro Navigation – What is it and why do we need it?
Astronavigation (or celestial navigation as it is also known) is a fascinating subject that encompasses many areas of knowledge including geography, astronomy, history and mathematics. As you unravel the principles and techniques upon which navigation is based, you will be … Continue reading →
Posted in Astro Navigation Topics, Schools

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, global positioning system, GPS failure, mathematics of astro navigation, mathematics of celestial navigation, navigation

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Finding Longitude In A Survival Situation.
We know that the Earth revolves about its axis once every 24 hours. In other words, the Sun completes its apparent revolution of 360o in 24 hours. This means that the Sun crosses each of the 360 meridians of longitude once … Continue reading →
Posted in Astro Navigation Topics, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, survival, survival  astro navigation, survival  navigation

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Latitude from Polaris
Using The Pole Star (Polaris) To Find Your Latitude Assume that the Pole Star (Polaris)is exactly in line with the Earth’s axis produced, as shown in the following diagram. To an observer O on the Equator (lat. 0o) the Pole … Continue reading →
Posted in Astro Navigation Topics, navigation, Schools, Survival

Tagged amazon, astro navigation, book, celestial, celestial navigation, celestial navigation for dummies, celestial navigation made easy, celestial navigation training, eBook, mathematics of celestial navigation, navigation, survival, survival  astro navigation, survival  navigation

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Distance to the Horizon
The Pharos Lighthouse. The Pharos Lighthouse or the Lighthouse of Alexandria as it was also known, was commissioned by Ptolemy Soter the ruler of Egypt and completed during the reign of his son Ptolemy II in about 270BC. It was … Continue reading →
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