Evolution of the individual ϵ CMa and β CMa Strömgren spheres (orange rings), the Local Bubble (“LB,” purple ring), the CLIC (average trajectory shown in red), and the Sun (trajectory shown in yellow). The evolution of ϵ CMa and β (orange stars) and their respective Strömgren spheres are plotted assuming they are completely independent, but given their similar trajectories, their ionizing radiation will form a larger combined sphere (see Figure 1). Between t = −15 Myr and t = −12 Myr both the Local Bubble and β CMa formed.