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09 November 2023 | Story Prof Matie Hoffman

A decade ago, the former Lamont-Hussey Observatory in Bloemfontein became Southern Africa’s first digital planetarium. Thanks to a collaboration between the University of the Free State (UFS), the Mangaung Metropolitan Municipality, the Department of Science and Innovation, and the Free State Province – as well as donations from trusts, foundations, and businesses – the project has grown and thrived.

Many different shapes, one place

The Naval Hill Planetarium was established in the old Lamont-Hussey Observatory. After the closure of the astronomical observatory, the buildings were refurbished and used by PACOFS as the Observatory Theatre. When the site became available again, it was envisioned to turn it into a planetarium. After many years of hard work, the newly refurbished buildings were opened in 2013 as the Naval Hill Planetarium – the first digital planetarium in Africa south of the Sahara. 

The decade has seen many changes on the site of the former Lamont-Hussey Observatory, founded by the University of Michigan in 1927 to study double stars through the largest refracting telescope in the Southern Hemisphere. Improvements include the conversion of the old telescope building into a modern digital planetarium, the refurbishment of the structure of the old Lamont telescope and its installation as a display outside the old telescope dome, an observing platform, and a new hall for environmental education. The planetarium and the hall are now known as the Centre for Earth and Space, and developments are continuing.

Partners who have supported the project include the American Museum of Natural History (AMNH), the University of Michigan, Old Mutual, Sun International, the Hermann Ohlthaver Trust, ArcelorMittal, the Joan St Leger Lindbergh Charitable Trust, and the CB van Wyk Gesinstrust. In 2022, the Raubex Group and First Technology supported the University of the Free State to upgrade the planetarium’s projection system. Volunteers, including the Friends of the Boyden Observatory and the Naval Hill Planetarium, as well as the Friends of Franklin, have played an invaluable role in supporting and developing this community asset. The planetarium is managed by the Department of Physics at the University of the Free State.

A time to celebrate

During November and December 2023, the planetarium’s first decade will be celebrated with events and special shows, including the South African premier of the AMNH full-dome film, Worlds Beyond Earth. The board of the Southern African Large Telescope (SALT) – the largest single optical telescope in the Southern Hemisphere – will attend the premiere. Many international partners are involved in SALT, and AMNH is one of the shareholders in the SALT Foundation. As part of the partnership between the AMNH and SALT, AMNH provides sponsorship for education and outreach efforts in South Africa. The Naval Hill Planetarium benefits from this initiative and receives content for the planetarium in the form of AMNH full-dome films.

In addition to regular school shows, there will be two public shows every Saturday in November and December – one show in English and one in Afrikaans. In December, there will be additional shows for children. Bookings for shows should be done through Computicket, click here to book. The planetarium can accommodate group bookings and functions (enquiries at +2 51 401 9751 or ficky@ufs.ac.za).

News Archive

UFS researcher engineers metal surfaces
2015-03-03

Shaun Cronjé, a PhD student, in a surface characterisation laboratory at the UFS.

It is well known that the surface of a component is much more vulnerable to damage than the interior, and that surface-originated degradation such as wear, corrosion, and fracture will eventually destroy the component.

“Engineering the surface, based on scientific knowledge, is essential to control these damaging processes. It also creates electronic and geometric structures on the surface which opens up a world of new devices, especially considering the properties on the nano-length scale,” said Prof Wiets Roos from the Department of Physics at the University of the Free State (UFS).

At elevated temperatures, atoms are more mobile and can migrate to grain boundaries and surfaces, which have a major influence on material properties. The redistribution of solute atoms between the surface and the bulk of the material is known as segregation. Knowing the behaviour of segregation at the surface/environment interface can be very useful in the development of new materials. As an example materials can be improved higher efficiency and lower fuel consumption, thus reducing environmental pollution.

The main aims of Prof Roos’s research are to understand surface segregation, use it as a tool, and contribute to the various surface engineering fields.

The surface characterisation laboratories at the UFS are well equipped to do high temperature segregation measurements, and have already proven a success, not only in the ability to prepare the specimens for characterisation, but also in developing models and procedures to quantify the segregation parameters.

The most recent results have demonstrated the importance of taking evaporation into account during quantification.” This has laid the foundation for future studies by installing the necessary hardware in a surface characterisation spectrometer, establishing experimental protocols, and improving an existing model (developed in this laboratory) for simulating segregation profiles,” said Prof Roos.

Segregation parameters allow the researcher to predict and utilise the surface concentration behaviour as a function of temperature and time. “This not only contributes to fields involving corrosion, oxidation, sintering, wear, chemical poisoning, powder metallurgy, and lubrication but adds to the development of self-healing devices,” said Prof Roos.

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