Main Page | See live article | Alphabetical index A Glowworm is a luminous trail of a tiny meteor, occasionally visible in the night sky during a meteor shower. The centimeter-sized comet pieces can produce hundreds of fireballs or more each hour. In some cases, particularly during the Leonids, the fireballs make bright trails, sometimes called glowworms in the sky, that can stay up for 10 to 15 minutes, according to astronomers. [1] Links Leonid meteors may spawn 'glowworms' - CNN Science and Space This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.