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Listed under:  Science  >  Earth and space  >  Universe  >  Galaxies

Hydrogen void in our galaxy, 2002

This is a false-colour image of warm atomic hydrogen gas in the outer Milky Way Galaxy made with the Australia Telescope Compact Array at Narrabri and the Parkes radio telescope. The gas is shown as bright yellow and orange in colour and there is a large void in the centre of the image indicating that hydrogen is absent ...


Radio image of the Circinus Galaxy, 2002

This is a false-colour velocity field image of the neutral hydrogen gas in the Circinus Galaxy. It was composed from data collected by the Australia Telescope Compact Array, located at the Paul Wild Observatory near Narrabri in New South Wales. Different colours represent different speeds. Red areas are moving away from ...


Giant radio galaxy J0116-473

This is a false-colour image of the giant radio galaxy J0116-473 made using the Australia Telescope Compact Array at Narrabri in New South Wales. The galaxy in the centre appears as a tiny target-like object with a red centre and a small ring of yellow around it. Two island-like masses show areas of colour from the spectrum ...


Ghost galaxy NGC2915

This is a composite image of the blue compact dwarf (BCD) galaxy NGC2915 made with Australian telescopes. The blue cloud is a false-colour image of atomic hydrogen produced by the radio telescopes of the Australia Telescope Compact Array. This is superimposed on an optical image showing stars and distant galaxies (shown ...


Supernova remnant in the Small Magellanic Cloud, 2002

This is a composite false-colour image of a supernova remnant in the Small Magellanic Cloud. Circular clouds of blue and red surround less regular green formations against a black background. The image is composed of data from optical (green), radio (red) and X-ray (blue) telescopes.

Interactive Resource

Night Sky Quiz

This is a ten question multiple choice quiz that gives students feedback on their understanding of about the nature of the night sky and the universe. A useful resource to determine what students already know or to promote discussion. Feedback provides some excellent explanations.


Science student of the year Western Australia 2008

This friendly chat helps to break down some stereotypes about scientists. Jacinta Delhaize travelled to Chile and work at the Gemini South Observatory in the Andes Mountains. She talked about her experience with high school students and for this received the Science Student of the Year award in 2008. Her PhD researches ...

Interactive Resource

Sites2See: Astronomy for secondary

A small galaxy of sites and resources, starting with Galileo's discoveries. Includes interviews and masterclasses with Australian astronomers, task-based laptop wraps, and images from NASA and Astro-photographer David Malin.

Interactive Resource

Fred Watson Masterclass

Fred Watson has been Astronomer-in-Charge at the Anglo-Australian Observatory (AAO) since 1995, pioneered work on optical fibres used optical telescopes and has had a long and entertaining scientific career. In this Masterclass, filmed at University of Western Sydney (UWS) Observatory, Fred Watson presents his ?Stargaze? ...


Very Large Telescope

This 10 minute video segment from Catalyst explains why the telescope is located where it is and relates it to the properties of light.

Moving Image

Discover some of the mysteries of the universe!

Watch and listen as Dr Graham Phillips explains what has been discovered about our universe in the last decade or so. What did the WMAP satellite study? What did it confirm? The scientists in this story talk about being surprised to find that the universe is expanding at an increasing pace. What do they say is responsible ...

Moving Image

Threshold 2: The Stars Light Up

This short video gives an overview of the emergence of the first atoms, hydrogen and helium, 380,000 years after the Big Bang. The effects of gravity led to tiny variations in the density of matter throughout the Universe, which in turn became heated, resulting in fusion and the emergence of the first stars, galaxies, and ...