Venus is an inner planet that orbits the Sun closer to it than Earth does. From our perspective on Earth, Venus can never be observed exactly opposite the Sun in the sky, which is known as superior conjunction. Instead, Venus goes through various phases similar to our Moon. These phases range from a crescent to a half phase, and finally to a full phase, known as inferior conjunction.
When Venus is in its crescent phase or closer to the Sun in the sky, it is difficult to observe due to its proximity to the Sun's glare. However, as Venus moves away from the Sun and reaches its maximum elongation angle, it becomes visible in the evening sky after sunset, or in the morning sky before sunrise, depending on its position in its orbit.
Venus is often referred to as the "Evening Star" when it appears in the western sky after sunset, and the "Morning Star" when it is visible in the eastern sky before sunrise. Due to its relatively close proximity to Earth and its brightness, Venus can be seen even when it is near the Sun in the sky. Its visibility throughout the year is a result of its orbital motion and the changing positions of Earth, Venus, and the Sun.