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With Explore the Planets, investigate the planets, their moons, and understand the processes that shape them. By G. Jeffrey Taylor, Ph.D. See our DVD collection.

Oscar Peralta

I studied Chemical Engineering at the National Autonomous University of Mexico. After that, I realized that fluids flowing in a pipe was not as interesting as studying bigger things, like oceans, mountains, clouds, and the Earth itself.

So I studied then Earth Sciences at the same University. During my master degree I focused on carbon particles in the atmosphere, where do they come from, what are they doing, are they watching us? Too many questions and just a few answers. So, I began my doctorate studies to study the flying part of particles, that is the organic composition.

MILAGRO project is important to the people in Mexico City, if we want to play soccer and see the ball in clear days with no particles and no health damages, we have to learn how to eliminate them from the air. During this project I'm going to be on the guided visits to the research sites and reporting from the field any news from scientists and the atmosphere.

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Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game!

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Traveling Nitrogen Classroom Activity Kit

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

David Greenberg

Hi, my name is David Greenberg and I'm the Director of Technology for the Mohawk Trail Regional School District in western Massachusetts. I've been helping teachers use computers in their classrooms for...more

Judy Lloyd

I am a professor at SUNY Old Westbury, a small public college located 30 miles from New York City. I have been teaching chemistry here for over 25 years, and have an active research program involving undergraduate...more

Robert Long

Hi everyone! Throughout high school and college, my main interest was in the weather while my favorite science course was chemistry. I combined the two in graduate school when I entered the Meteorology...more

Dr. Dara Salcedo

I am originally from Mexico City were I grew up and eventually got my Bachelor's degree in Chemistry. When I started college, I had many questions about molecules, reactions, colors, substances, and I...more

Light extinction of particles

Not all particles are the same, many of them have different shape, size, and composition. Some of them reflect or scatter light, and others absorb it. Two instruments on the image, photometer and nephelometer,...more

Introduction to Milagro

One of the most complex field campaigns ever undertaken in the field of atmospheric chemistry began in March 2006. A team of researchers from around the world is in Mexico City for a series of projects...more

What does Tecamac mean?

Measuring site T1 is in Tecámac. This is a little town close to Mexico City. The name Tecámac is a Náhuatl word, an ancient Mexico's language, spoken by Aztecs. In Náhuatl, Tetl or Tec means stone, camatl...more

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