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?
Look ma, no gravity!
Every moment of life on our planet has had the force of gravity in the background. But the prospect of long-distance space travel means it's time to figure out what happens to our biology in its absence.
Artist impression of the Trappist-1 System.
Credit: ESO/M. Kornmesser/spaceengine.org
Scientists have discovered seven Earth-sized planets packed around a dim star.
NOAA/NASA GOES Project
The Earth's magnetic field acts like a giant instrument playing magnetic music.
Hidden Figures is certainly inspirational, but the racial politics of the space programme were hardly so easily settled.
Space exploration and exploitation has changed a lot in 50 years.
The Outer Space Treaty, now 50 years old, has so far never been violated. But things could be about to change.
Tiny CubeSats are ready to be our eyes in the skies.
Earth Background: NASA; HARP Spacecraft: SDL; Montage: Martins, UMBC
As technology advances, tiny satellites no bigger than a loaf of bread have advanced from just proving they work to being big contributors in answering science questions.
Eugene Cernan inside the lunar module after his second moonwalk of the mission. His spacesuit is covered with moondust.
Often eclipsed by Apollo 11, the final manned moonshot left far more than bootprints in the dust. In these troubling times, it also left us with a lasting message of hope.
The discovery of the year was the first detection of gravitational waves.
Colliding black holes to exploding spacecraft, 2016 was an incredible year for astrophysics.
Listen to some weird space sounds and help identify crunches, whistles and other odd effects. It could help save our satellites.
Using terrestrial forensic science to point the finger of blame to criminals in space will be much harder than it looks.
Leibniz’s 'great question' remains a central question in philosophy and science today.
Enjoy the full moon’s glow.
Full moons are good reason to look up – and the one on Nov. 14 is no exception. But here’s why you likely won’t see something shockingly different from other full moons you've observed over the years.
All about the atmosphere.
Atmospheric changes on exoplanets could hold clues to our own environmental problems.
Coronal mass ejections can play havoc with Earthbound communications.
There's a disturbing history of solar flares taking out the technology we depend on. As tech becomes more and more vital, knowing what is happening in space is growing ever more crucial.
The SPARTAN re-usable space launch technology.
Whatever happens next in new space race will happen quickly. The opportunity is there for Australia to be involved, but it won’t be there for long.
Outer space should be used for peace not war.
The rules on armed conflict on Earth are a major source of restraint on military operations. But the rules on the use of weapons in outer space are far from clear. We need to change that.
Ceres’ Haulani Crater shows evidence of landslides from its crater rim.
The latest data from the Dawn space probe points to underground ice flows and a water vapour atmosphere.
Mysterious radiation that appears to come from star HD 164595 is more likely to have a terrestrial origin.
NASA Goddard Space Flight Center
Our growing dependency on satellites for all forms of communication has made the problem of space weather even more acute.