The effects of quintessence on geodesics and ther-
modynamics of the Schwarzschild-de Sitter black hole are
studied and the results are compared with the case without
the presence of quintessence. We show that the presence of
quintessence increases the entropy and heat capacity of the
Schwarzschild-de Sitter black hole and decreases the mass
and temperature of this black hole. In particular, we focused
on types of orbits and we found that the coordinate time, cir-
cular orbits, period of the circular orbits and the angle of de-
flection of light for this black hole increase in quintessence
field while the quintessence decreases the effective poten-
tial, force on the massless particle, Lyapunov exponent λ
and closest approach.

• Effects of dark energy on geodesics and thermodynamics of the Schwarzschild-de Sitter space-time