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In This Month - March 2018

13 March 1781 Uranus discovered by Sir William Herschel. It expanded the known boundaries of the solar system becoming the first planet to be discovered with a telescope. 28 March 1917 Dr Lucy Gullett (Pictured right) & her sister, Minnie, joined the BAA NSW Branch (now Sydney City Skywatchers). Dr Gullett was one of the first female medical doctors and served in WW1. 28 March 1949 Fred Hoyle first uses the term “Big Bang” on BBC radio’s Third Programme. He was not a proponent of the Big Bang, instead formulating the Steady State Theory. He died in 2001 never accepting the Big Bang Theory. 31 March 2005 Dwarf planet Makemake discovered. Its name derives from the mythology of the Rapa Nui peo

Solar Observations for January 2018

"The lowest Sunspot and group count I have ever made...' The solar disc was still clear of Sunspot from last December 2017 to the 4th January when a single Axx (1) spot was seen at 20° North & Longitude 332°. Though it could not be seen on the 5th it could still be observed on the 6th in AR12693. Due to bad weather no observation were made until 13 January with the solar disc still clear of Sunspots until the 16th. On that day a Csi (12) group of spot were observed 10° South & Longitude 125° in AR12696 consisting of 3 spots, 2 with Penumbra and 1 without. It remained visible until the 18th but only with a CV of Axx (1).No further Sunspots could be seen for the rest of the month PROMINENCES.

Did you know? - size and density

Kepler 7B, a newly found giant exoplanet, has the density of a styrofoam cup. Betelgeuse, a star in the Orion Nebula (photo above) which appears orange in colour, is so big that if it was placed where our Sun is, it would swallow up Mercury, Venus, Earth, Mars and Jupiter. Olympus Mons, on Mars, is the largest volcano in the solar system at nearly three times the height of Mt Everest

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