The giant elliptical galaxy NGC 1052 (at left) dominates the cluster it's a part of, though many other large galaxies are present, such as the giant spiral NGC 1042. Nearby to these galaxies are small ...

Researchers at the University of Helsinki have succeeded in something that has been pursued since the 1970s: explaining the X-ray radiation from the black hole surroundings. The radiation originates ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. There's an enormous controversy in astrophysics today over how quickly ...

8 lessons with each module dedicated to a key concept in radiobiology.The physics and chemistry of radiation interactions with biological matter. Radiation-induced DNA damage and repair. Cell death ...

An excess 21-cm absorption signal is a clear sign of scattering of baryons and dark-matter particles. In general, the intensity of the 21-cm signal is expressed as the observed brightness temperature ...

Lisa Randall is Frank B. Baird, Jr., Professor of Science at Harvard University. She serves on Scientific American’s board of advisers. Among her many books is Dark Matter and the Dinosaurs: The ...

A career in optical physics or engineering means knowing about the behavior and properties of light, including its interactions with matter and its detection by instruments. Since the discovery that ...

Electron microscopes are used to visualize the structure of solids, molecules, or nanoparticles with atomic resolution. However, most materials are not static. Rather, they interact, move, and reshape ...

Physicists and astronomers have determined that most of the material in the universe is “dark matter”—whose existence we infer from its gravitational effects but not through electromagnetic influences ...