Tag Archive for 'astronomy'

Brian Schmidt wins the Nobel Prize

It’s an exciting time for astronomy in Australia, with the recent announcement that Professor Brian Schmidt is to receive the 2011 Nobel Prize for Physics and the strong possibility that the nation could be selected next year as the site for the Square Kilometre Array (SKA). Both optical astronomy (Schmidt’s area of expertise) and radio astronomy (the domain of the SKA) have flourished here since World War 2. Australia is thoroughly embedded in the amazing international effort to observe, measure and understand the universe.

Powerhouse Museum Collection. Gift of Mt Stromlo Observatory, 1989.

While most of the Powerhouse Museum’s astronomy collection relates to the history of our own Sydney Observatory, we have a few items used at Mt Stromlo, where Schmidt carried out his prize-winning observations. Professor Ben Gascoigne built this polarimeter at Mt Stromlo in 1963 to detect magnetic fields in distant dust clouds. The instrument, currently on display at Sydney Observatory, was designed to be bolted onto a telescope, gather the light scattered by dust particles, and detect the alignment of particles that indicates the presence of a magnetic field.

Now Brian Schmidt was born and studied in the USA but carried out key work in Australia. The aura of winning a Nobel Prize is such that we are happy to claim him as one of ours, while also making the same claim about Professor Elizabeth Blackburn, who was born and studied here but migrated to the USA, where she did the work that won her the 2009 Nobel Prize for Medicine.

Both Schmidt and Blackburn hold dual citizenship, so they can be claimed legitimately by both nations. Importantly, these scientists can be seen as valuable role models for the youth of both countries, which is why the Museum is interested in telling their stories – as well as the stories of less stellar scientists such as the talented Ben Gascoigne, whose other claim to fame was as the husband of artist Rosalie Gascoigne (both of whom were born in New Zealand but chose to live in Australia).

Conservator’s Corner- The Hugo Schroeder Telescope

Photography by Jean-Francois Lanzarone © Powerhouse Museum, all rights reserved

A major project to overhaul the Sydney Observatory’s 11.5″ Schroeder Telescope has been recently completed. It coincides with the 150th anniversary of the Observatory in 2009. The key aim was to return the telescope to its 1880s appearance and configuration. New operational and maintenance plans have also been developed. 

The telescope has been well maintained as an operating instrument of the Sydney Observatory. It was painted the same colour grey as the other operating instruments at the Observatory during the 1960’s and 70’s. The telescope is now classified as one of the museum’s A category objects used to demonstrate observing technology of the 1880’s. 

The project started in April 2009, when the main lens, earpiece, focusing assembly, the sighting scope and the other brass components were dismantled and brought back to the Museum’s conservation workshop. 

 

Photography by Chris Brothers © Powerhouse Museum, all rights reserved

Photography by Chris Brothers © Powerhouse Museum, all rights reserved

Damaged lacquer and corrosion were removed from these brass components, which were then treated for chlorides and coated with a clear protective lacquer. 

 

Collection; Powerhouse Museum.

The optics and the telescope drive were carefully dismantled, cleaned and realigned ready for installation.

Photography Powerhouse Museum © all rights reserved.

A new eye piece was modified to fit the telescope as the original eye piece was too damaged to be dismantled and realigned.

 

 

Collection; Powerhouse Museum

Original areas of paint on the telescope tube and pillar were identified, samples taken, colour matched and documented.

The telescope tube and pillar were then painted in their original colours (Bristle Green and Monarch Red) in a readily available paint system which can be easily maintained. The Telescope was reassembled and on display for the Observatories 150th Anniversary weekend and is again part of the Observatories public viewings and programs.

 

Photography by Chris Brothers © Powerhouse Museum, all rights reserved.

The conservation work was undertaken by conservator Timothy Morris with assistance from conservator Skye Mitchell and registrar Carey Ward. Images were taken by conservation photographer, Chris Brothers.

Meet the curator- Nick Lomb

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Photography by Sotha Bourn © Powerhouse Museum all rights reserved

Name
Dr Nick Lomb (retired December 2009)

What is your speciality area?
By training I am an astronomer, but my full official title is curator of astronomy, timekeeping, navigation, meteorology, surveying and the history of Sydney Observatory.

How long have you been working at the Museum?
I was acquired by the Museum, sort of came with the furniture, when the Museum took over the running of Sydney Observatory, on 1 July 1982. By that time I had been at the Observatory for over three years, having started there on 19 February 1979.

What is your favourite object in the collection?
I have many favourites and it’s hard to reduce the list to just one. There is the historic 29-cm lens telescope still being regularly used in Sydney Observatory’s south dome. There is the Earnshaw 520 chronometer used by the explorer Matthew Flinders in the first circumnavigation of Australia and with a fascinating subsequent history. And I cannot ignore the beautiful repeating circle from Parramatta Observatory made by the firm with the wonderful name of Reichenbach, Utzschneider und Liebherr in Munich, Germany in the early 1800s. Then there is the Strasburg Clock model that is demonstrated every hour at the Museum.

What piece of research or exhibition are you most proud of in your career at the Museum?
The last exhibition is always the favourite. Currently this is the From Earth to the Universe exhibition that opened on 11 September 2009 at the Powerhouse Museum (most of my previous exhibitions have been at Sydney Observatory). The exhibition looks fantastic, but subtly incorporates a fair amount of astronomical information. As visitors experience the journey from the solar system through the neighbourhood of our own galaxy and then to the realms beyond they pick up information on astronomy and our Universe. So far the public and Museum staff reaction to the exhibition has been enthusiastic.

Sydney Observatory Star Camera

Casing for the Sydney Observatory astrograph. Collection, Powerhouse Museum

I think one of the most underrated curatorial skills is the ability to remain engaged in your current research while at the same time making mental notes of everything that wanders across your field of vision. Sometimes when you are visiting the stores something amazing may catch your eye and open up a new field of discovery but at other times the reverse is true and things you may have overlooked suddenly come alive when you start researching them.

Such was the case with this object. It may look like a length of sewage pipe but it is in fact the partial remains of Sydney Observatory’s astrograph, or star camera, one of the most important cameras ever made in Australia. However my first impressions of this amazing instrument were very different. When I began working on writing significance statements for Sydney Observatory instruments there were a number of objects like this one that had no photograph and were located in our stores some 32 kilometres away.

Sometimes it is essential to look at the object but in this instance I was able to progress without doing this because of the number of articles published by astronomers who had used the ‘star camera’, and one even published an entire book, with photographs, about it.

Star camera set up in observatory dome

Star camera set up in observatory dome

This was my first visual impression of the star camera and as you can see it was a truly formidable looking instrument. Starting in 1890 H. C. Russell and James Short used it to take over 20,000 negatives for the international project to record the positions of stars in the night sky. Even more impressive is the fact that although all the other observatories ordered star cameras from the instrument maker Howard Grubb, Sydney decided to make theirs here in Australia.

Before this almost all major telescopes were imported, but the star camera reflects the confidence Sydney now had in its own engineering firms. In the end only the Grubb lens and a Troughton and Simms tangent screw were made overseas with all the rest made by local Sydney firms and W. I. Masters, the instrument maker at The Sydney Observatory.

However this was a working instrument and not long after this picture was taken it was taken down and moved to new observatory some miles out of Sydney. Different lenses were experimented with and rehoused in the casing. In 1922 it was even packed onto a horse and cart and shipped to Queensland where it was set up at the racetrack in Goondiwindi to observe a solar eclipse.

Finally after a few weeks of research I decided it was time to make the pilgrimage to see this amazing instrument in the stores at Castle Hill. My shock at seeing what remained of the camera felt a bit like seeing a slaughtered animal and I now keep a much more open-mind when working among the objects on the museums shelves.