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October 14, 2019

Sunspot activity for the month of September remained extremely low however, on the 1st September two very small Bxi spots were observed in AR12748 and remained on the solar disc the following day as a single Axx spot.

No further Sunspots were seen on the Sun for the rest of the month.


The most significant Prom...

September 30, 2019


31st October 1992

Pope John Paul II pardons Galileo for his views. The Catholic church condemned Galileo in 1633 for his subversive views, namely that the Earth revolved around the Sun. He lived under house arrest for the rest of his life. Pope John Paul II formally apologized for the "Galileo Case" in the first o...

September 30, 2019

Coronal Holes were observed at the end of July, beginning of August by Space - these are shown in the image above from NASA's Solar Dynamics Observatory, recorded using very sophisticated imaging equipment. 

However, through my telescope in the Southern Hemisphere the Sun appeared far less exciting and I obs...

September 29, 2019

In addition to the informative talks at our monthly meetings Sydney City Skywatchers (SCS) offers or assists at public sky viewings. Over the past couple of years members have taken their telescopes, binoculars and enthusiasm to astronomy events at Sydney Observatory and Centennial Parklands. Recent events have include...

September 7, 2019

This month Pluto…. Once our ninth planet Pluto was demoted to “dwarf planet’ in 2006. However, with the New Horizons mission enigmatic Pluto, once shrouded in mystery, is giving up its secrets. The image below is Pluto photographed by the LORRI and Ralph instruments aboard the New Horizons spacecraft in 2015.


August 31, 2019

26th September 1905

Einstein’s Theory of Special Relativity is published. It is the generally accepted and experimentally confirmed physical theory regarding the relationship between space and time and contains one of the most famous equations, e=mc2, which in simple terms means if you multiply a specific amount of mass...

August 14, 2019

For the month of July, 2019 and during my 21 days of solar observations I did not see any Sunspot activity.

The only activity that was seen were Prominences. These were mostly faint and small.

The most prominent was on the 8th reaching 47,000km in height, the 9th a Hedgerow Prominence on the NW limb reaching 65,000km hig...

August 11, 2019

This month ….. the incredibly quick to the incredibly long and everything in between

It takes the Sun 225 million years to travel once around the centre of the Milky Way Galaxy. This is known as a galactic year or a cosmic year.

A Pulsar is a neutron star that spins incredibly fast. The fastest known spinning pulsar, PSR...

July 31, 2019

28th August 1789

Saturn’s moon Enceladus is discovered by Sir William Herschel during the first use of his new 1.2 m telescope, then the largest in the world. Enceladus is about 500 km in diameter and orbits Saturn every 32.9 hours, fast enough for its motion to be observed over a single night of observation. Enceladus...

July 18, 2019

This month we celebrate the 50th anniversary of Apollo 11 landing on the Moon with a few little known facts of the Apollo missions. Where were you when the “one small step for man” was taken?

Australia played an important role in the historic Apollo 11 Moon landing with the Parkes telescope - “The Dish” - broadcasting t...

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March 31, 2020

February 3, 2020

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