1, self-luminous
The planet itself doesn't shine, what we see is the sunlight it reflects.
2. Capable of emitting light by itself
A star is a big celestial body like the sun. It will react inside itself and radiate energy into space in the form of light.
Step 3 melt and glow
Comet? Like Halley's comet, the light we see is the phenomenon that its material tail is melted when it passes through the solar system, so the comets we see often have long tails. Most of the stars we can see at night are stars, and some of them are planets in our solar system, such as Venus, Mercury and Mars.
A star is a celestial body visible to the naked eye in the universe. The energy activity inside the star makes the shape of the star irregular. Stars can be roughly divided into planets, stars, comets, white dwarfs and so on.
The brightest planet is Venus, the fastest star runs at a speed of over 2.4 million kilometers per hour, and H 1504+65 is the hottest white dwarf.