About a century ago, we didn’t even know that galaxies existed.
Mai Lam/The Conversation NY-BD-CC
Pretty much as soon as we understood what galaxies were, we realised they are all moving away from each other. And the ones that are further away are moving faster. In short, the universe is expanding.
The things you can do with an amaterur telescope.
With a little bit of knowledge and a few pieces of equipment you too can look at the night sky and see it as a cosmologist does.
ns gw art.
From a slow hum to a chirp or a bleep, what is that sound you hear whenever there's a new detection of gravitational waves?
An artist’s rendering of how the first stars in the universe may have looked.
N.R. Fuller, National Science Foundation
Signals from the first stars to form in the universe have been picked up by a table-sized detector in a west Australian desert. The find also hints at an early interaction with dark matter.
Timeline of the universe.
From blindingly bright and burning hot to pleasantly 'candle-lit', the first years of the universe would have been spectacular to see.
Blink and you’ll miss it – until the next one.
A guide to meteor showers – what to look out for and when.
Religions tend to portray God as deeply concerned with humans, yet we seem hugely unimportant in the vast scheme of things.
So many galaxies viewed by the Hubble Space Telescope: but what’s their real shape in 3D?
NASA, ESA, and J. Lotz and the HFF Team (STScI)
The first reliable measure of the 3D shape of galaxies and their rotation helps to shed light on their history.
Part of the new map of dark matter made from gravitational lensing measurements of 26 million galaxies in the Dark Energy Survey.
Chihway Chang/University of Chicago/DES collaboration
We still can't see the dark matter thought to make up about a quarter of the universe, but at least now we have a map of its structure.
In the beginning, the Universe expanded very, very fast.
What caused the Big Bang is still a mystery. And that's just one of the many unanswered questions, in spite of everything we do know about the birth of the Universe.
Simulated universe: EAGLE collaboration, J Schaye et al 2015.
Is dark energy just an illusion, as is often suggested? To resolve the dilemma, interpreting the basic principles of general relativity in a complex Universe may need a rethink.
Artist’s conception of two merging black holes, spinning in a nonaligned fashion.
LIGO/Caltech/MIT/Sonoma State (Aurore Simonnet)
These ripples in the very fabric of the universe were hypothesized by Einstein a century ago. Now scientists have detected them for the third time in a year and a half – ushering in a new era in astrophysics.
ASKAP at night.
It used to take weeks to find any of these mysterious signals from deep in space but when the new telescope started looking it found one within days. Then another.
ESO provides new ways to access the southern sky for Australian astronomy.
ESO/José Francisco Salgado
Australia's new partnership with the European Southern Observatory will give our astronomers access to much bigger telescopes.
Artist’s impression of ZF-COSMOS-20115, a galaxy that stopped making new stars and rapidly turned into a compact red galaxy.
The recipe book for galaxy formation may need to be rewritten after the discovery of a massive galaxy that stopped making new stars early in the Universe's history.
Artist’s impression of a quasar shining through a galaxy’s ‘super halo’ of hydrogen gas.
A. Angelich (NRAO/AUI/NSF)
Astronomers are surprised by what they're finding out about galaxies that formed in the early days of our universe, now that sensitive telescopes allow direct observation, not the inference of old.
Most modern spiral galaxies, such as NGC 1300, are thought to have loads of dark matter in their outer regions.
NASA, ESA, and The Hubble Heritage Team STScI/AURA)
So where did all the dark matter come from?
The Australian Square Kilometre Array Pathfinder uses several telescopes to survey the sky.
After months of running in test-mode, the Australian Square Kilometre Array Pathfinder telescope is now gathering data at an incredible rate to give us a new look at how our universe works.
The Andromeda Galaxy, just part of a finely tuned universe.
Flickr/NASA, ESA, J. Dalcanton, B.F. Williams, and L.C. Johnson (University of Washington), the PHAT team, and R. Gendler
A new book explores some of the big questions of why the universe exists and why it seems fine-tuned for life.
Leibniz’s 'great question' remains a central question in philosophy and science today.