ĭusk can be used to create an ominous tone and has been used as a title for many projects. After this time the Sun no longer illuminates the sky, and thus no longer interferes with astronomical observations. It marks the end of astronomical twilight, which begins at nautical dusk. Many parents allow their children to roam freely in their neighborhood as long as they are home by. At astronomical dusk, the Sun's position is 18° below the horizon in the evening. Dusk is the period of time between sunset and nightfall.At this time, objects are less distinguishable, and stars and planets appear to brighten. It marks the end of nautical twilight, which begins at civil dusk. At nautical dusk, the Sun apparently moves to 12° below the horizon in the evening.Beyond this point artificial light may be needed to carry out outdoor activities, depending on atmospheric conditions and location. The sky has many colors at this time, such as orange and red. The following image presents the most commonly used.
At this time objects are still distinguishable and depending on weather conditions some stars and planets may start to become visible to the naked eye. The full list of definitions is shown in the table below in alphabetical order. It marks the end of civil twilight, which begins at sunset.
Civil, nautical, and astronomical twilight.