Several dwarf galaxies have been discovered close to our own Milky Way and are adding to our understanding of how galaxies form. But why haven’t astronomers seen them before?
Articles on Cosmology
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More than 100 million years has been wiped off the age of the first stars but there is still the question of what happened in the first billion years of the universe. Earlier this month the European Space…
One of this century’s greatest potential discoveries concerning the origins of the universe has now fallen to galactic dust. That’s according to a new joint-analysis of all the existing data – including…
Interstellar’s protagonists spend a significant portion of the movie’s 169-minute running time giving mini-lectures – sometimes with props and a little whiteboard – on theoretical physics. The characters…
While invisible, dark matter completely dominates our Milky Way, recent measurements of just how much dark matter there is have revealed a bit of a mystery. In a paper published today in the Astrophysical…
Without the sun, there would be no Earth – but amazingly, we don’t know the finer details about the prenatal history of our sun, where it was born and if other stars in our galaxy share a similar…
Recent observations suggest that there is something not quite right with our view of our universe – that something is skewing our view of the oldest radiation arriving at our telescopes. What’s causing…
Over the last few years we’ve been studying the orbits of dwarf galaxies and we expecting to find them buzzing at random around large galaxies. But looking out into the universe, we see some dwarfs undertaking…
The recent BICEP2 observations – of swirls in the polarisation of the cosmic microwave background – have been proclaimed as many things, from evidence of the Big Bang and gravitational waves to something…
Scientists at the Harvard-Smithsonian Centre for Astrophysics in the US have announced overnight what they believe is the indirect detection of gravitational waves in the afterglow of the Big Bang. The…
The cosmological community is bubbling with the news that the BICEP2 experiment may have detected gravitational waves through measuring the radiation left over from the big bang. If the findings are correct…
There is a myth that goldfish have a three-second memory, and I sometimes wonder if the same is true about the part of the human mind that deals with science in the news. This week, the international media…
Cosmologists have detected a long sought component in the Cosmic Microwave Background (CMB), which will help us to further…
Space is Big. Really Big. The Hitchhiker’s Guide to the Galaxy pretty much nailed space with those five words. And space is so really big that our earthly measures of distance struggle. The distance to…
Nobel prizewinner Samuel Ting, early this morning (AEDT), announced the first results from the Alpha Magnetic Spectrometer (AMS) search for dark matter. The findings, published in Physical Review Letters…
Astronomers have measured the spin of a black hole buried in the heart of a galaxy located 56 million light years away, and discovered it was spinning quickly – about as quickly as it could go. That was…
One of the most exciting things about science is the detective work, and never was this more the case than Friday. Within an hour or so of the event, almost everyone had seen the dramatic footage of the…
An asteroid named 2012 DA14 will come within 27,700 kilometres of Earth early on Saturday morning Australian time (around 6:30am AEDT). At this distance the asteroid will pass within the orbits of several…
It’s not every day that you discover a huge structure that stretches more than half way across the sky. But this exact thing happened to the international team of astronomers I was leading, as we pored…
Deep images of the sky reveal that the universe contains billions of galaxies. Some, such as our own Milky Way, are immense, containing hundreds of billions of stars. Most galaxies, however, are dwarfs…
Top contributors
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Professor of Astrophysics, University of Sydney
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Pro Vice-Chancellor Flagship Initiatives, Swinburne University of Technology
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Associate Professor in Astronomy, Monash University
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Reader in Astrophysics, UCL
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Lecturer and ARC DECRA Fellow, Queensland University of Technology
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Cosmologist, University of Tasmania
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John Curtin Distinguished Professor (Radio Astronomy), Curtin University
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Professor (Astrophysics), University of Southern Queensland
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Associate Professor in Archaeology and Space Studies, Flinders University
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Pro-vice-chancellor, Professor, University of Birmingham
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Australian Government Women in STEM Ambassador, Professor of Practice, UNSW
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Emeritus Professor, ARC Centre of Excellence for Gravitational Wave Discovery, OzGrav, The University of Western Australia
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Researcher at Research School of Astronomy and Astrophysics and the Research School of Earth Sciences, Australian National University
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ARC Laureate Fellow, Swinburne University of Technology
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Head of Research Data & Software, Macquarie University