Articles on General Relativity

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There are two broad ways to measure the expansion of the universe. One is based on the cosmic microwave background, shown here, along with our own galaxy viewed in microwave wavelengths. ESA, HFI & LFI consortia (2010)

From dark gravity to phantom energy: what’s driving the expansion of the universe?

The universe is expanding faster than expected, but we don't know what's driving it. Here are a few of the possible explanations, from dark energy to a modification of general relativity.
A team effort: Dr David Reitze, of the LIGO Laboratory at Caltech, shows the merging of two black holes that led to the detection of gravitational waves. REUTERS/Gary Cameron

Australia’s part in the global effort to discover gravitational waves

The discovery of gravitational waves involved a team of more than 1,000 scientists from across the globe, including Australia. So how does such an international collaboration work?
Wes Mountain/The Conversation

Timeline: the history of gravity

It's taken centuries for our understanding of gravity to evolve to where it is today, culminating in the discovery of gravitational waves, as predicted by Albert Einstein a century ago.
2015 saw us complete our exploration of all nine planets (including dwarf planet Pluto) in our solar system. NASA

2015, the year that was: Science + Technology

2015 was a year where we expanded our view of the universe, embraced new technologies and got a hint of the profound changes to come.
General relativity isn’t only a powerfully descriptive theory, but there’s a beauty in its elegance.

The art and beauty of general relativity

Einstein's theory of general relativity is a triumph of reason and imagination, of art and science, with a profound beauty of its own.
You can feel the weight of an object on Earth because of its mass. But what is mass? Flickr/Jeremy Brooks

Explainer: what is mass?

We talk about mass all the time but what is it that actually gives an object mass? And why do some things have mass and others have no mass at all?
Dark matter is notoriously hard to detect, but a new experiment might finally shed light on this mysterious substance. Dirk Dallas/Flickr

How we plan to bring dark matter to light

A new detector built deep underground in a gold mine will hopefully unravel the mystery of dark matter.

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