At one time, scientists thought the space between
Earth and Sun was a vacuum. But we now know that the sun fills it with gusts of
hot, electrically charged atomic 1 called the solar wind. Sometimes this wind blows hard. When the Sun’s outer
layer is very active, it 2 nearly
one-third of its gaseous matter outward at supersonic speeds.
The U. S. government’s oceans and atmosphere agency NOAA, has a Space
Environment Center to monitor these 3 .
The center’s director, Ernest Hildner, says 4
solar emissions are not dangerous to people on the ground, but
can be a 5 to airplane occupants and
astronauts. They can also shut down satellites, power networks, communications,
and other technical systems. Scientists have long known that
solar storms are generated internally by the sudden 6
of magnetic energy rising to the surface. Like a tightly
7 rubber band, the Sun’s magnetic
fields can suddenly snap into a new shape. Researchers have tried to predict
solar storms by 8 on these magnetic
patterns. But 9 . But how are they
linked to solar storms New satellite data have provided
answers to U. S. government scientists and colleagues from the aerospace
firm Lockheed Martin. They have revealed that 10
. Lockheed Martin physicist Karel Schrijver says 11 .
【参考答案】
this method is not very reliable in that electrical currents......