Dear Colleagues,

Studies of gravity theories lie at the interface of astrophysics, cosmology, nuclear physics, and collider physics. Constraining such theories entails the capability to compare predictions to a wide range of observations. In this line of thought, over the last 30 years, growing research areas, such as precision cosmology and astrophysics, have developed, where complex numerical methods and simulations to deal with Big Data observations are employed to construct viable solutions to the current issues at hand, evoking the consideration of new theories of gravity or exotic components at cosmic and local scales. Although much has been learned through these approaches, progress has guided us to a degeneracy of proposals. We invite our colleagues to contribute their papers to inform the scientific community of the advances made on these topics.

Prof. Dr. Celia Escamilla-Rivera
Guest Editor

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• dark energy
• dark matter
• structure formation
• modified gravity
• observational cosmology
• observations
• future surveys
• neutron stars
• gravitational waves