Uncategorized
- Astronomy
Assault on Andromeda: Nearby galaxy had recent collision
New findings suggest that a small galaxy recently plunged into Andromeda, opening a new window on collisions that are rare today but were common in the early universe.
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This article states, “Several billion years from now, scientists predict, the galaxy and the Milky Way will collide. . . .” How can galactic collisions occur in an expanding universe, where galaxies should be moving away from each other? James HendryFlorissant, Mo. On the large scale, objects are indeed receding from each other. But locally, […]
- Physics
Vanishing Actor: Physicists unveil first invisibility cloak
The first functional invisibility cloak, which operates at microwave frequencies, has emerged from the laboratory.
