Author: Peter Household

A Cork Astronomy Club public lecture held in UCC’s Ashley Cummins Building

Not all science is done by scientists.  Amateur astronomers have made significant contributions to measuring light pollution and identifying best and worst localities, yielding results that sometimes contradict satellite data.  The science of Jupiter’s atmosphere has advanced as far as it has in large part by professional scientists having access to images uploaded by amateur observers to special websites.   

Outreach Officer at MTU’s Blackrock Castle Observatory, Frances McCarthy is one of our Club’s favourite speakers. We learnt about a wide variety of opportunities for amateur astronomers to make their mark,  with different sponsors, amongst them Exoplanet Watch, EU-Citizen.Science, Globe At Night, NASA citizen science, The American Association of Variable Star Observers (AAVSO).  

And Frances revealed the first citizen science project – Haleys’5 1715 eclipse map, shown below with Frances inset. Halley made the map with help of a numerous crew of observers assembled by the following appeal: “A Request to the Curious to observe what they could about it, but more especially to note the Time of Continuance of total Darkness …”  More about this here: “How Edmond Halley kicked off the golden age of eclipse mapping” 

Frances McCarthy with Halley’s map of the 1715 eclipse

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A Cork Astronomy Club public lecture held in UCC’s Ashley Cummins Building

Eddie Lyons ─ “Exploring Jupiter: Past, Present, Future”

Dan McLoughlin ─ “3-D printing: how does it work, what can it do for amateur astronomy?”   

Geoffrey Eastaway ─ “Uni-verse:  Poetry and astronomy”

Left to right: Geoffrey, Eddie, Dan

This was “Members Night”.  At the last monthly meeting of the season we invite three members to each make a short presentation on a topic of their choice.  The result was varied menu and an enjoyable evening.

Bears hibernate in the winter and Cork Astronomy Club hibernates in the summer.  Our next public lecture will be in September 2023, probably Monday 11^th.

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A Cork Astronomy Club public lecture held in UCC’s Civil Engineering (Ashley Cummins) Building

Not all astronomy is done with a telescope. Large-scale computer simulations, run with the help of high performance computing facilities around the world, provide a unique view of the cosmos as well as crucial theoretical predictions that inform astronomical observations. Dr Tremmel, a lecturer in UCC’s School of Physics, gave an overview of how astrophysicists utilize simulations and conduct numerical experiments to better understand the formation and evolution of galaxies and the supermassive black holes at their centres.

The title of the lecture was “Creating the Universe on a Computer ─ How simulations help us study galaxies”.   We look forward to seeing Dr Tremmel again.

Above: Dr Tremmel rescues Schrödinger’s cat

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A Cork Astronomy Club public lecture held in UCC’s Civil Engineering Building

Telling the time is one of the earliest applications of astronomy, and the sundial, the earliest device to tell time of day and divide daylight into hours. James Quain, a member of Cork Astronomy Club with a lifelong interest in sundials, told how these installations work and the astronomy they are based on.

James illustrated how time is depicted, and discussed the development of sundials from the earliest known examples. 

Above: James with his Armillary Dial.

A sundial we learnt, consists of two parts: a gnomon to cast a shadow, and a dial plate.  We found out things we didn’t know we didn’t know … the extraordinary variety of sundials … James brought his own replica of a portable wooden dial as used by shepherds in the Pyrenees, and a model of the earliest known sundial consisting of two stones ─ another portable device used by the Pharaohs in 1500 BC. 

For most sundials (but not the shepherd’s dial) you need to know north.  But a solar compass from 1835 works the other way round.  It uses two very different sundials (image below), you turn it till they both agree, and hey presto, it’s facing South. The world’s largest sundial is at Jaipur in India, and the smallest consist of two metal rings that those who were rich enough in the 18th century kept in their pocket.

Finally James took grave issue with Hilaire Belloc who wrote “I am a Sundial and I make a botch, of what is done much better by a watch”

Workshop, April 15th

For Club members only, James followed this lecture up with a workshop. In small groups members made paper sundials, cutting out components and assembling, including set up & orientation.

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A Cork Astronomy Club public lecture

Cian O Regan talked about human factors in space flight, problems that arise and what is being done to learn how best to cope with them. Cian is a PhD student at MTU, and his thesis will investigate these questions.

Cian wears a pilot’s cap in an aircraft cockpit, at left of lefthand photo.  The recorded behaviour of pilots in emergency situations provides useful data for his research.  Right: a hypothetical Mars astronaut controlling a drone.

Sending astronauts to the Moon and Mars will pose huge challenges for the astronauts both psychological and physical, challenges which far surpass what is encountered on the International Space Station.  How will astronauts respond and will their ability to perform their duties and to respond to emergencies be impaired?  What can be done to mitigate the ill effects?

The 5 hazards of human spaceflight are radiation, altered gravity fields, hostile and closed environments, distance from Earth, and isolation and confinement.   Human factors is a field of study to reduce error and increase productivity focussing on the interaction between the human and the machine.  

Avoid the Norman door!

We heard about a Norman door, all too common in public buildings – where the design tells you to do the opposite of what you’re supposed to do, and there has to be a sign to correct it. Normanism is to be avoided at all cost in designing spacecraft.  

There’s an optimum level of arousal to maximise human performance.  Boredom at the low end (think of a 6-month journey to Mars) and strong anxiety at the high end both impair human performance.  So is it worth sending humans at all, why not just send robots?  Because humans are so much more productive than robots ─ for now, anyway.

Human factors is the field of study to reduce error and increase productivity focussing on the interaction between the human and the machine. For space agencies these are urgent questions and Cian described what has been done so far to address them, and his own research.

The lecture was live streamed over Zoom.

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