OpinionMarch 11, 2025
Strong Scientific Leaders Must Speak Out against the Trump Administration’s Science Denial
The U.S. National Academy of Sciences should denounce the antiscientific policies of the Trump administration
Stories by Ray J. Weymann
Ray J. Weymann is a retired astrophysicist now engaged in public education concerning climate change and renewable energy. He is director emeritus of the University of Arizona Steward Observatory and the Carnegie Observatories, Pasadena, Calif.
OpinionAugust 5, 2020
Science and Scientific Expertise Are More Important Than Ever
An engaged and well-informed public has always been the foundation of our democracy
Space & PhysicsAugust 1, 1978
Stellar Winds
Stars of various sizes and types are observed to eject matter into space in a slow, steady stream. A number of mechanisms may be responsible for this surprisingly common phenomenon
Space & PhysicsJanuary 1, 1969
Seyfert Galaxies
They superficially resemble normal spiral galaxies, but something violent is going on in their central regions. They seem to have much in common with the most powerful radio sources known, the quasars