Galactic dynamics and stellar kinematics examine the gravitational forces that shape the structure and evolution of galaxies and the motions of their constituent stars. By mapping positions and ...
Astrophysical observations of galaxies reveal persistent discrepancies between the gravitational acceleration inferred from luminous matter and the motions of stars and gas. Traditional remedies ...
Cosmic rays are charged subnuclear particles that move close to the speed of light, constantly raining down on the Earth. These particles are relativistic, as defined by Albert Einstein’s special ...
Participants on the Galactic 05 flight by Virgin Galactic's VSS Unity vehicle carry our research and other activities during the brief weightless phase of the Nov. 2 flight. Credit: Virgin Galactic ...
A view of the center of our galaxy shows the Sagittarius C (Sgr C) region, where cold dust (magenta) and warmer gas and dust (cyan) surround a cluster of massive stars. The stars generate high-speed ...
While moving around within the gas in the interstellar medium, cosmic rays kickstart the background protons, which causes a collective plasma wave movement akin to ripples on a lake. The big question ...
This illustration shows how waves and particles interact -- wave amplitude is growing while particle drift speed is dropping due to scattering. CREDIT A. Marcowith, A.J. van Marle, and I. Plotnikov ...
WASHINGTON, August 24, 2021 -- Cosmic rays are charged subnuclear particles that move close to the speed of light, constantly raining down on the Earth. These particles are relativistic, as defined by ...
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