Representation of the orbit of the star 232121.57-160505.4 in the Galactocentric cartesian frame, colour coded according to the time. The white dot represents the current position of the star. The black circled dot and the dashed circular line indicate the position and the approximated orbit of the Sun, respectively. Credit:: […]

An artist’s impression of what the Milky Way might look like seen from above. The colored rings show the rough extent of the fossil galaxy known as Heracles. The yellow dot shows the position of the Sun. Credit: Danny Horta-Darrington (Liverpool John Moores University), NASA/JPL-Caltech, and the SDSS Scientists working […]

The Milky Way Galaxy is seen in this illustration. Credit: NASA/JPL-Caltech/R. Hurt (SSC/Caltech) A halo is a large region filled with hot gas that surrounds a galaxy, also known as a “circumgalactic medium.” The heated gaseous halo around the Milky Way was the incubator for the Milky Way’s formation some 13 billion […]

Stars identified in the research have formed “shell structures” in the aftermath of a radial merger occurring 3-billion years ago. Credit: Rensselaer Polytechnic Institute Evidence of broadside collision with dwarf galaxy discovered in Milky Way. Nearly 3 billion years ago, a dwarf galaxy plunged into the center of the Milky Way […]

A view of the gas in the Magellanic System as it would appear in the night sky. The Magellanic Corona covers the entire sky while the Magellanic Stream is seen as gas flowing away from the two dwarf galaxies, the Large and the Small Magellanic Clouds. This image is taken […]

ANIMATION An international team of researchers has discovered a dense, cold gas that’s been shot out from the center of the Milky Way “like bullets.” Exactly how the gas has been ejected is still a mystery, but the research team, including Professor Naomi McClure-Griffiths from The Australian National University (ANU), say their findings could […]

Still from a simulation of individual galaxies forming, starting at a time when the Universe was just a few million years old. Credit: Hopkins Research Group, Caltech Caltech researchers use deep learning and supercomputing to identify Nyx, a product of a long-ago galaxy merger. Astronomers can go their whole career […]

Scientific ‘Red Flag’ Reveals New Clues About Our Galaxy Figuring out how much energy permeates the center of the Milky Way — a discovery reported in the July 3 edition of the journal Science Advances — could yield new clues to the fundamental source of our galaxy’s power, said L. Matthew Haffner of Embry-Riddle […]

A still image from a simulation of the formation of dark matter structures from the early universe until today. Gravity makes dark matter clump into dense halos, indicated by bright patches, where galaxies form. In this simulation, a halo like the one that hosts the Milky Way forms, and a […]