space

what is vision

Detection of light

what is the retina

where images are formed.

what is lgiht reflection

when waves encounter a surface that does not absorb its energy

what is the law of reflection

Angle of incidence equals angle of reflection.

what is light refraction

Bending of light

what is visibke lifht

colors composing white light.

what is the optical system

system forming images on the retina.

what is astronomy

Study of space

what can you ibserve in the night sky

stars

planets

constellations

what are the sun and planets

Central star and celestial bodies orbiting it.

how is the earth structure

mantle

core

crust

what are the forces on earth

Tectonic forces shaping the Earth's surface.

what is a natural satalite

Orbits the Earth.

what are artifical satelites

Orbit Earth for various purposes.

what are soace missions

Exploring outer space for scientific research.