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ACE Mission Page

Have you ever wondered what you are made of? Where did the elements come from that make up your body? The elements that make up your body are the same elements found on the Earth. Where did those Earth...more

IMF

IMF stands for Interplanetary Magnetic Field. It is another name for the Sun's magnetic field. The Sun's magnetic field is huge! It goes beyond any of the planets. The Sun's magnetic field got its name...more

Coronal Mass Ejections

"Without warning, the relatively calm solar atmosphere can be torn asunder by sudden outbursts of a scale unknown on Earth. Catastrophic events of incredible energy...stretch up to halfway across the visible...more

Solar Activity

The Sun is not a quiet place, but one that exhibits sudden releases of energy. One of the most frequently observed events are solar flares: sudden, localized, transient increases in brightness that occur...more

The Solar Atmosphere

The visible solar atmosphere consists of three regions: the photosphere, the chromosphere, and the solar corona. Most of the visible (white) light comes from the photosphere, this is the part of the Sun...more

The Solar Interior

To understand how our Sun works, it helps to imagine that the inside of the Sun is made up of different layers, one inside the other. The core, or the center of the Sun, is the region where the energy...more

High Altitude Observatory

Scientists at the High Altitude Observatory (HAO) try to understand the changes we see in the Sun over time. They also study how these changes affect the atmosphere of the Earth. There are four main areas...more

Sun's Effect on Earth's Weather (Wind)

Energy from the Sun affects many things on Earth. One of the main things the Sun does is warm our planet, including the atmosphere. This energy drives much of our weather. The solar cycle, the rise and...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF