Scientists are using secondary signatures from the cosmic microwave background to map the universe’s hidden matter.
Research by UCLA and Keck Observatory scientists concluded that the object, X7, could be a debris cloud from a stellar collision.
CAPE CANAVERAL, Fla. (AP) — A spacecraft that plowed into a small, harmless asteroid millions of miles away succeeded in shifting its orbit, NASA said Tuesday in announcing the results of its save-the-world test.