Twilight on Earth is the illumination of the lower atmosphere when the Sun is not directly visible because it is below the horizon. Twilight is produced by sunlight scattering in the upper atmosphere, illuminating the lower atmosphere so that Earth's surface is neither completely lit nor completely dark. The word twilight is also used to denote the periods of time when this illumination occurs. The lower the Sun is beneath the horizon, the dimmer the twilight. When the Sun reaches 18° below the horizon, the twilight's brightness is nearly zero, and evening twilight becomes nighttime. When the Sun again reaches 18° below the horizon, nighttime becomes morning twilight. Owing to its distinctive quality, primarily the absence of shadows and the appearance of objects silhouetted against the lit sky, twilight has long been popular with photographers, who sometimes refer to it as "sweet light", and painters, who often refer to it as the blue hour, after the French expression l'heure bleue.
关于Twilight
Adapted from the book of the same name by Stephenie Meyer, this film follows Bella Swan as she falls in love with the vampire Edward Cullen.
Twilight的成就
Twilight won over 20 awards, including People's Choice Award for Favorite Movie, MTV Movie Award for Movie of the Year, and MTV Movie Award for Best Kiss.
您不知道Twilight的热门事实
Belt of Venus - The Belt of Venus is an atmospheric phenomenon visible shortly before sunrise or after sunset, during civil twilight. It is a pinkish glow that surrounds the observer, extending roughly 10–20° above the horizon.. Earth's shadow, visible at twilight.. Gloom - Gloom is a low level of light which is so dim that there are physiological and psychological effects. Human vision at this level becomes monochrome and has lessened clarity.. Green flash - The green flash and green ray are meteorological optical phenomena that sometimes occur transiently around the moment of sunset or sunrise.. Polar night - The polar night is a phenomenon where the nighttime lasts for more than 24 hours that occurs in the northernmost and southernmost regions of Earth. This occurs only inside the polar circles.. Dawn.. Parts of a day.. Visibility.. Earth phenomena.. Night.
