Just like we orbit the sun and the moon orbits us, the Milky Way has satellite galaxies with their own satellites. Drawing from data on those galactic neighbors, a new model suggests the Milky Way should have an additional 100 or so very faint satellite galaxies awaiting discovery.
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A detected overlap of gravitational lenses and gamma-ray signals could shed light on the nature of dark matter.
Matching up maps of matter and light from the Dark Energy Survey and Fermi Gamma-ray Space Telescope may help astrophysicists understand what causes a faint cosmic gamma-ray glow.
The Large Synoptic Survey Telescope will be named for an influential astronomer who left the field better than she found it.
Roughly 85 percent of mass in the universe is "dark matter" -- mysterious material that can't be directly observed but has an immense influence on the cosmos. What exactly is this strange stuff, and what does it have to do with our existence? Astrophysicist Risa Wechsler explores why dark matter may be the key to understanding how the universe formed -- and shares how physicists in labs around the world are coming up with creative ways to study it.
His work aims to deepen our understanding of dark matter, dark energy and other secrets of the universe.
The Large Synoptic Sky Survey will collect so much data that data scientists needed to figure out new ways for astronomers to access it.
The Dark Energy Spectroscopic Instrument begins final testing, setting the stage for a 5-year survey that will analyze the light of 35 million galaxies.
Scientists are designing a next-generation experiment to map the Big Bang’s relic afterglow.