In addition to axions, this substance interacts with gravity and the weak force in the form of WIMPs and MACHOs, and it is theorized to constitute 27% of the total mass-energy in the universe.
The XENON100 experiment used particles scattering off liquid xenon to detect this entity, which is central to the Lambda-CDM parameterization of the Big Bang cosmological model. It commonly forms galactic halos, and Vera Rubin used this to explain how stars have a constant (*) rotational velocity independent of radial distance. In addition to axions, this substance interacts with gravity and the weak force in the form of WIMPs and MACHOs, and it is theorized to constitute 27% of the total mass-energy in the universe. For ten points, identify this substance that neither emits nor absorbs light and is thus unobservable.
The XENON100 experiment used particles scattering off liquid xenon to detect this entity, which is central to the Lambda-CDM parameterization of the Big Bang cosmological model.
dark matter [do NOT accept “dark energy” or “matter” or “antimatter”] &lt;EC&gt;