Sometimes I lie back on the grass and watch the sky as if it were a slow movie, and every so often a thin, bright line rips across the frame and my heart skips. Those streaks are tiny rocks or dust — called meteoroids — slamming into Earth's atmosphere at absurd speeds. The air in front of them compresses and heats up so quickly that the meteoroid's surface vaporizes; that vapor and the surrounding air get ionized and glow, which is the streak of light we see. If the rock is bigger, the flash is brighter and can tumble apart into a string of sparks.
What I love about them is the variety: little pinpricks that look like brief pencil strokes, brilliant fireballs that light up the whole sky, and the soft, lingering trains that sometimes hang for seconds after the flash. Colors can tell you something too — sodium gives off yellow, magnesium is white, and copper can make a greenish tint. During meteor showers like the 'Perseids' or 'Geminids' — when Earth passes through a comet's dusty trail — the rate goes way up and you feel like you've walked into a cinematic moment. Catching them makes me feel small and wildly connected to space all at once.