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Schwarzchild Radius:

r = (2 G M)/c^2 |

r | event horizon radius

M | mass

G | Newtonian gravitational constant (≈ 6.674×10^-11 m^3/(kg s^2))

c | speed of light (≈ 2.998×10^8 m/s)

Escape Velocity:

v = sqrt((2 G m)/r) |

v | speed

m | mass

r | radius

G | Newtonian gravitational constant (≈ 6.674×10^-11 m^3/(kg s^2))