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We now offer the Cool It! card game in our Science Store. Cool It! is the new card game from UCS that teaches kids about the choices we have when it comes to climate change.
This is an artist's rendition of the AIM spacecraft taking measurements of the mesosphere while flying through space.
Click on image for full size
Courtesy of NASA (Hampton University)

AIM Mission Overview

Do you know what the highest clouds in the atmosphere are called? Polar Mesospheric Clouds (PMC’s)! These are very special clouds that form about 50 miles above the Earth! They are called Polar because they normally form close to the poles of the Earth (not near the equator). They are called Mesospheric because the form in the mesosphere, the third layer of the Earth's atmosphere.

There is a new mission that will study these PMC's. It is a spacecraft called AIM (this stands for Aeronomy of Ice in the Mesosphere). The (AIM) mission will be launched in 2006 and will study these clouds in detail for over two years.

Look for PMC's high in the sky just when the Sun is setting. If you see glowing, blue-white clouds, you might be seeing PMC's. AIM and its 3 instruments will be looking too!

Last modified June 18, 2004 by Jennifer Bergman.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA