Every time they are there .We can see a body if light falls on it or it emits lights.So planets are seen at night, but at day time their intensity of light become very less than the Sun ,so they disappears.
However when the moon eclipse the sun totally we can see them.
You can see all of them in the sky at night.
Because the sun shines on them and illuminates them, exactly the way you shine a flashlight on a rock in order to see it at night.
Mercury
In Florida's western night sky, you can typically see Venus and Jupiter. These two planets are bright and easily spotted with the naked eye. Venus is especially prominent due to its brightness, often referred to as the "Evening Star".
You can see five of them in the night sky when it's clear, one of those also in the daytime sky if it's clear and you know exactly where to look, and another one at any time of the day or night even if the sky is cloudy and it's raining.
In the night sky. Jupiter is usually visible, as well as Mars. Venus is visible in the early morning.
Venus is the brightest planet in the sky. It is often referred to as the "evening star" when visible in the western sky after sunset or the "morning star" when visible in the eastern sky before sunrise.
Yes. To date scientists have discovered well over a thousand planets orbiting other stars. It is believe that a large portion of the stars in the night sky have planets.
Ancients distinguished between planets and stars in the night sky by observing that planets move relative to the fixed background of stars, while stars maintain their positions.
In the night sky, you can see stars, planets, the Moon, constellations, and sometimes satellites or shooting stars. These objects appear as points of light against the dark backdrop of space and can be observed with the naked eye or with the help of telescopes or binoculars.
The Sun reflects light from the surfaces of the planets and that way we are able to see them from Earth, hence why the further away the planets are, the more difficult it is to see them. Not impossible, but difficult.
-- stars -- planets -- HST and ISS overpassing -- meteors -- comets -- bright nebulae -- aircraft landing lights -- the Milky Way -- constellations -- crescent moon