Neil gives a presentation of astrophotography - how do you photograph the night sky? What cameras can you use? What settings are best? How do you fit a camera to a telescope? How do you use software to layer and enhance images?
All this and more, plus examples! Monday 10 September 2016, at the Club House.
Are we alone in the Universe?
A presentation by Dr Robin Catchpole at St Brelade's CHURCH HALL All welcome 13 June 2016 at 8.15 pm April 20 is a big day for strange happenings in the night sky. Due to a highly improbable interaction with Uranus, the moon will glow in a shade of green. It sounds spectacular, but it's completely false. To find out about this and other astronomy hoaxes, come to the Astronomy Club on Monday 11th April at 8 pm.
Algol known colloquially as the Demon Star, is a bright star in the constellation Perseus. The Arabic form is Al-Ghul, the Ghoul.
Algol is actually a three-star system (Beta Persei A, B, and C) in which the large and bright primary Beta Persei A is regularly eclipsed by the dimmer Beta Persei B. Thus, Algol's magnitude is usually near-constant at 2.1, but regularly dips to 3.4 every 2 days, 20 hours and 49 minutes during the roughly 10-hour-long partial eclipses. The association of Algol with a demon-like creature (Gorgon in the Greek tradition, ghoul in the Arabic tradition) suggests that its variability was known long before the 17th century, but there is still no indisputable evidence for this. Investigating a calendar for lucky and unlucky days composed in Egypt some 3200 years ago, scholars have noted a significant periodicity of 2.85 days and several empirical tests indicate that this periodicity may be connected to Algol. |
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