The Orionid meteor shower, known for fast-moving meteors that leave gas trails in the night sky, is building toward a peak on the morning of Sunday, October 21. The moon will set at 3:56 AM, leaving a prime peak-shower viewing window of about 2 hours before morning twilight begins to brighten the sky at 5:47 AM. The Orionids are not the strongest meteor shower of the year, usually providing just 10-20 meteors per hour. They are fast-moving meteors — 41 miles per second — and relatively faint, but about half of them leave trails of ionized gas behind them that are visible for a few seconds. Just find a dark, open area and scan the night sky.