Question

Write the main differences between stars and planets.

Hint:

A star like the Sun has a lifespan of billions of years, while planets have no internal source of energy.

Answer 1

Step 1: Definition of Stars 
Stars are luminous celestial objects that generate their own light and heat by nuclear fusion reactions taking place in their core. Example: the Sun. 
Step 2: Definition of Planets 
Planets are non-luminous celestial bodies that revolve around stars. They shine by reflecting the light of the star they orbit. Example: Earth, Mars, Jupiter. 
Step 3: Key Differences in a Table 

Stars	Planets
Self-luminous, produce their own light and heat.	Non-luminous, reflect light from stars.
Fixed position in sky relative to each other.	Change position with respect to stars.
Massive size and very high temperature.	Smaller in size and relatively cooler.
Examples: Sun, Sirius, Polaris.	Examples: Earth, Venus, Saturn.

Step 4: Real-Life Importance 
Stars help us study the universe and understand nuclear fusion. 
Planets provide suitable conditions for life (like Earth). 
Final Answer: 
Stars emit their own light and energy, while planets are non-luminous bodies that revolve around stars and shine only by reflecting light.