NASA's Roman Space Telescope could find alien Earths
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The Milky Way as a laboratory for civilizations Any attempt to chart alien societies has to start with the structure of The Milky Way itself, a disk roughly 100,000 light years across with hundreds of billions of stars and a complex history of star formation. Astrophysicists treat that disk as a kind of natural experiment, where planetary systems form at different distances from the galactic ...
SOME of the brightest stars in the night sky are aliens from another galaxy. These interlopers were probably incorporated into the Milky Way when it ripped their parent galaxy to shreds and cannibalised its stars. Julio Navarro of the University of ...
Our Milky Way is far from calm — it ripples with a colossal wave spanning tens of thousands of light-years, revealed by ESA’s Gaia telescope. This wave, moving through the galaxy’s disc like ripples in water, shifts stars up and down in a mesmerizing ...
A NASA astrophysicist has recently proposed a theory that could potentially resolve the long-standing Fermi Paradox. The theory suggests that alien civilizations may be scattered sparsely throughout the Milky Way. This implies that while extraterrestrial ...
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A collision between ...
New simulations of Milky Way-like galaxies reveal that the strange split between two chemically distinct groups of stars may arise from several very different evolutionary events. Bursts of star formation, shifts in flowing gas, and even streams of metal ...
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Galactic archaeologists find stars in the Milky Way came from another galaxy 12 billion years ago
Look up on a dark night and the Milky Way appears as a calm band of stars across the sky. But our galaxy has a violent past. For more than 13 billion years it has grown through star formation and mergers with other galaxies.
Astronomers say a dwarf galaxy, left, merged with the primitive Milky Way galaxy about 12 billion years ago. Credit: NASA / ESA / Joseph Olmsted illustration Astronomers have uncovered the 12.3-billion-year-old ruins of an ancient galaxy hiding in the ...