Analyses

The ASTRO 3D Centre of Excellence achieved 50% women personnel over a 5 yr time-frame by implementing a suite of evidence-based recruitment and retention initiatives. These initiatives changed how postdoctoral researchers were recruited and helped to develop a supportive and positive culture.

Our current cosmological observations cannot distinguish between a cosmological model with a fifth force acting on dark matter and one for which the laws of gravity are modified. Instead, a method using future gravitational redshift data is proposed.

Each uncontrolled rocket body in orbit poses a low casualty risk on reentry. But the cumulative risk is unacceptable and disproportionately borne by the Global South. Spacefaring states must stop exporting these risks and plan for safer reentries.