The visible portion of the atmosphere and the outer space seen by us with our naked eyes without any equipment is known as the sky.
Whereas the infinite expanse of our universe which contains our solar system, stars, celestial bodies, galaxies is known as space.
Sky is a smaller part of the space.
What is meant by space observation? Why is it important?
The study of planets stars, other celestial objects and galaxies using satellites, telescopes etc. to understand the structure of the universe is known as space observation.
Space observation gives us detailed information about the planets, comets, stars, galaxies and other celestial bodies.