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all-sky map of the Milky Way

YOU ARE HERE  The most precise all-sky map of the Milky Way  was released by the Gaia space telescope team on April 25. It shows the total brightness and color of nearly 1.7 billion stars and a few neighboring galaxies (bright spots to the lower right of the main disk).

Asteroid hurtling toward Earth

INCOMING  Water vapor can be trapped in glass and melted rocks that are created by an asteroid impact. The finding boosts the idea that asteroids brought water to the early Earth.

illustration of experimental set up

DRUMMING UP ENTANGLEMENT  Two teams of scientists demonstrated quantum linkages between two specially designed jiggling structures: drumheadlike objects (illustrated) and silicon beams (not shown). 

Sandby borg

SUDDEN DEATH  Excavations at Sandby borg, an ancient ringfort on an island off Sweden’s southeastern coast, have uncovered evidence of a possible surprise attack and massacre of the site’s inhabitants around 1,500 years ago.



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