An artist’s impression of the predicted merger between our Milky Way (right) and the neighboring Andromeda galaxy (left). So which galaxy will dominate?
NASA; ESA; Z. Levay and R. van der Marel, STScI; T. Hallas; and A. Mellinger
Bigger galaxies tend to dominate the smaller, when the two collide. But the pending battle between our Milky Way and the Andromeda galaxy might be a much fairer fight than we previously thought.
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.
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.
Untangling the history of the Milky Way.
Understanding how the billions of stars in our galaxy formed and evolved is the subject of a huge galactic archaeology project.
Mysterious Milky Way.
A new discovery can help determine where all the stars in the universe's galaxies actually come from.
The Andromeda Galaxy.
Astronomers have taken a forensic approach to study the stellar halo of a galaxy to reveal hidden secrets on how such galaxies were formed.
A colour image of G63349, one of the galaxies in the survey, created using near-infrared (VISTA telescope) and optical (Sloan telescope) data collated by the GAMA survey. (The bright green object is a nearby star.)
Our universe's most exciting days are well behind us, with new research showing the universe is now slowly but surely dying.
There may be more and bigger black holes out there than we thought. Do we need a map?
Meet the supermassive black hole that defied the model.
Elliptical galaxies, like this one, are burnt out and no longer making stars.
Judy Schmidt and J Blakeslee (Dominion Astrophysical Observatory)
What happens to a galaxy when it runs out of the stuff needed to forge new stars?
Something new discovered near our Milky Way.
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?
An artist’s impression of a galactic protocluster forming in the early universe.
European Southern Observatory
Clusters of galaxies have back-stories worthy of a Hollywood blockbuster: their existences are marked by violence, death and birth, arising after extragalactic pile-ups where groups of galaxies crashed…
Gemini North observatory, on Hawaii’s Mauna Kea, shoots a laser beam into the night sky to create an ‘artificial star’, part of a process that helps astronomers remove blurring from any images of galaxies.
Gemini Observatory and Association of Universities for Research in Astronomy
A supermassive black hole has been found in an ultracompact dwarf galaxy – the smallest galaxy known to contain such a massive black hole. This finding, published today in Nature, suggests that supermassive…
There are some massive galaxies out there, and we now know a little about their early life.
Lauro Roger McAllister/Flickr
A piece of the galaxy formation puzzle may have fallen into place, thanks to a team of European and American astronomers peering into the depths of our early universe. According to new research published…
A dwarf galaxy: a challenge for modern cosmology? This dwarf galaxy ESO 540-31 is more than 11 million light-years from Earth, in the constellation of Cetus (The Whale).
, Luca LimatolaESA/Hubble & NASA
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…
Arp220 is a nearby Ultraluminous Infrared Galaxy similar to what ALESS65 would look like if it were closer to Earth.
NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University)
A galaxy more than 12 billion light years from Earth is heading for a “red and dead” future because it is running out of the fuel needed to make new stars. The galaxy, known as ALESS65, is an ultra-luminous…
A team of international astronomers has developed a more precise way to deduce the ages of stars and to pinpoint when our…
Galaxies arranged in delicate strings have been discovered in the huge, empty regions of the universe called voids. A research…
Dusty breeze from this black hole might be a star one day.
Matter escaping from the clutches of mysterious black holes may be responsible for forming stars, according to new research…
The reflected light from black holes enables astronomers to see how fast matter is swirling in the inner region of the disk, and ultimately to measure the black hole’s spin rate.
Scientists in the US have successfully used a new NASA telescope to help improve our understanding of how black holes and…
The Andromeda galaxy and its companions is challenging the very foundations of cosmology.
Adam Evans/Wikimedia Commons
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…