noctilucent cloud in a sentence

Examples

1. It is the first satellite dedicated to studying noctilucent clouds, and made its first observations on May 25, 2007.
2. Like an omen from the Book of Revelation, a wispy, silvery-blue noctilucent cloud hovered over Colorado late last month.
3. The southerly drift of noctilucent clouds may be the miner's canary of global warming, a signal of bad times ahead.
4. Somewhat frequent events are noctilucent clouds near the pinnacle of summer, which can only be seen outside of the city.
5. In the decades after Otto Jesse's death in 1901, there were few new insights into the nature of noctilucent clouds.
6. :: There has been much speculation that polar mesospheric clouds, sometimes known as noctilucent clouds, are seeded by carbon dioxide crystals.
7. In that respect, they look similar to the mesospheric clouds, also known as noctilucent clouds on Earth, which occur about above our planet.
8. The Earth presently moves through this plane around January 9 and July 9, when there is an increase in radar-detected meteors and meteor-related noctilucent clouds.
9. Just below the mesopause, the air is so cold that even the very scarce water vapor at this altitude can be sublimated into polar-mesospheric noctilucent clouds.
10. Because of the need for maximum cooling of the water vapor to produce noctilucent clouds, their distribution tends to be restricted to polar regions of Earth.