Question

why are planet seen only in night​

Answer 1

Answer:

Their visibility is determined by the interaction of light from the sun and the planets' own shadows. Sometimes these planets become visible just after it begins getting dark. Other times, they can only be seen very late at night. When they get too close to the sun, they aren't visible at all.

Answer 2

Answer:

Bcoz we can't see them in the presence of Sun due to its Light (Sunlight).