Sight: A streak of light falling (shooting) across the clear night sky. The appearance of many falling stars at once is called a meteor shower. In this case, stars can shoot all different directions. They may fall simultaneously, one after the other, or with periods of time in between.
Sound: Night sounds. Insects chirping and buzzing, wind in the trees, human sounds (doors opening, music playing, car engines), hushed voices and whispers, muffled footsteps, your own heartbeat. Also, see the setting entry Woods at Night.
Mood: Falling stars happen so quickly; to catch sight of one makes the viewer feel blessed or lucky to have witnessed it. A falling star will inevitably lighten the viewer's mood and can potentially turn the mind to bigger ideas and wonderings: the universe, life on other planets, the existence of God, etc.
Symbolism: good luck, change, a fulfilled wish, hope
Possible Cliches: a long-desired wish coming true after witnessing a falling star; someone witnessing a falling star at the precise time they most desperately needed one
OTHER: Falling stars aren't stars at all, but are actually meteors. When they enter Earth's atmosphere, they begin to burn, producing the light that we see as they travel across the sky. Scientists claim that on a given night, numerous falling stars occur each hour. Meteor showers can last for hours or days, and often reoccur at the same time each year.
Don't be afraid to use weather and earthly phenomena to add contrast. Unusual pairings, especially when drawing attention to the character's emotions, is a powerful trigger for tension. Consider how the bleak mood of a character is even more noticeable as morning sunlight dances across the crystals of fresh snow on the walk to work. Or how the feeling of betrayal is so much more poignant on a hot summer day. Likewise, success or joy can be hampered by a cutting wind or drizzling sleet, foreshadowing conflict to come.