Observing planets with the naked eye during the day is challenging due to the brightness of the sun. However, Venus, and occasionally Jupiter, can sometimes be spotted under the right conditions.
Venus is the most likely daytime naked-eye planet observer because of its brightness. It reaches peak brightness during its greatest elongations, appearing as a bright point of light at its maximum height above the horizon. To spot Venus during the day, it is necessary to know its position relative to the Sun and look during a time when the sky is clear and the sun isn’t too high.
Jupiter can also be seen during bright daylight, but this requires ideal circumstances and timing. Its greater distance from Earth and the Sun compared to Venus makes it less visible during the day. Observers need precise knowledge of Jupiter’s position and must block the sun’s light to increase their chances of seeing it.
For successful observation of either planet, a clear sky, location away from the sun’s glare, and sometimes optical aid, like adjusting focus on a telescope to infinity, can all improve visibility. However, for most casual observers, these sightings remain rare and require preparation and optimal viewing conditions.