Word: juri
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
While scientists cannot monitor these waves directly, they can see the effects on the solar surface. "On reaching the surface," explains Juri Toomre, an astrophysicist at the University of Colorado, "the waves cause the gases there to move up and down" -- oscillations that astronomers can measure. To date, they have discovered millions of different oscillations, up- and-down motions with cycles ranging from 2 1/2 to 13 minutes. Some are caused by seismic waves confined to a zigzag path near the surface, others by waves that plunge as far as four-fifths the distance to the solar center before being...