Answer:
stars
Explanation:
A. the theory of special relativity
Physical science, Earth science, and life science.
the orbits of the planets are elliptical
the sun is the center of the solar system
includes 9 planets
θ=142.9°
d=1 *r
angle ϕ= 37.1°
the line connecting pebble and target should be tangent to a circle so
cos(180-ϕ-θ)==
∴ θ=180-ϕ-
θ= 180-37.1-0