from __future__ import annotations

ST_CGS: float = 6.652e-25
MP_CGS: float = 1.672e-24
TCMB: float = 2.725
XH: float = 0.76
v_rms: float = 1.06e-3  # v_rms/c
Msun_Mpc3_to_CGS: float = 6.767e-41
sr2sqarcmin: float = 3282.8 * 60.0**2
Mpc_to_CGS: float = 3.085e24
Msun_Mpc2_to_Msun_pc2: float = 1e-12
