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The
Space Weather Center provides an engaging and timely opportunity for
museum visitors to deepen their understanding and appreciation of
the dramatic effects of solar activity on our planet. |
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Visitors interact with a plasmasphere
at SSI's Space Weather Center exhibit.
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Visitors to the Space Weather Center learn about:
- solar cycles and space weather, including the effects of the year
2000 solar maximum,
- the electrical and magnetic changes that take place in space that
affect people and equipment on Earth as well as in space,
- the cause of the greatest light show on Earth --- the aurora,
- and current events about space weather, including recent discoveries
from leading scientists.
Major Elements of the Exhibit
I. Living in the Atmosphere of the Sun
As visitors enter the exhibition, they are greeted by a large (3' x 6')
photomural of an active Sun and the comet-shaped region surrounding Earth,
called the magnetosphere. The photomural uses polar motion to simulate
the solar wind flowing from the Sun and around Earth's magnetosphere.
It is backlit and activated by push buttons on the railing. In this introductory
module, visitors learn that, contrary to popular opinion, outer space
is not empty, but is filled with gases hot enough to conduct electricity
and radiation at sometimes dangerous levels. The hot conducting gases
are called plasma, the fourth state of matter. They are introduced to
a variety of solar activity and learn that the Sun in the ultimate power
house for space weather.
The Space Weather Computer Kiosk includes (1) near real-time
data from the Sun, (2) near real-time auroral data from space, and (3)
space weather conditions in space using a traffic light device for level
of activity. The three areas for a visitor to access are: 1) What's Been
Happening on the Sun Recently?, 2) Recent Auroral Activity, 3) Weather
Conditions in Space.
II. Our Dynamic Sun
The outer layers of the Sun are in constant motion and emit a stream
of plasma called the solar wind, which fills the space between the planets
and beyond. This exhibit area explains the importance of sunspots, the
sunspot cycle, and describes the spectacular explosions called coronal
mass ejections (CMEs). High-speed, high-energy CMEs are carried along
in the solar wind. They are the primary cause of magnetic disturbances
on Earth, such as the disruption of electric power networks and the loss
of radio communications. The size of the Earth is compared to solar features
such as sunspots or CMEs to give visitors a sense of physical scale -
the Sun is really big. It is also very powerful - a CME emits enough energy
in just two hours to power the U.S. for 10,000 years!
The "Our Dynamic Sun Interactive Video" allows
visitors to access spectacular imagery of the Sun. Several quick sequences
are looped to run for 20 to 30 seconds.
III. Planet Earth: In the Path of the Storm
The Earth is a gigantic magnet. The solar wind confines Earth's magnetic
field to a comet-shaped cavity known as the magnetosphere, within which
one finds such regions as the Van Allen radiation belts. Electricity and
magnetism in space play an important role. As the solar wind flows past
the magnetosphere, it acts like a cosmic generator, producing millions
of amps of electric current. Some of this electric current flows into
Earth's upper atmosphere, which can light up like a neon tube to create
the beautiful but mysterious Northern and Southern Lights (called the
aurora). This exhibit area explains the cause of the aurora. Visitors
also learn why communication satellites and electric power networks are
vulnerable to space weather especially during magnetic storms.
The Sun-Earth Connections Interactive Video features stunning
footage of how solar activity impacts Earth. A series of 20 to 30 second
video clips show how CMEs interact with Earth's magnetosphere. The video
also includes spectacular auroral imagery , a model simulation of a magnetic
storm, and a canned space weather report.
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