The ?? Theo? ?? from ?? When ?? tions ?? during ?? stars ?? predict? ?? theory ?? bent th? ?? the ap? ?? ??
DURI? ?? astronomers ?? will make ?? ?? new comets th? ?? the sun to be ?? fact, enough ti? ?? a new comer's ?? and a second ?? ?et for its orbit ??
?? is a prize plum for any as? ?? since his discovery is auto? ?? named after him.
?? ?h? astronomers who will be ?? along the eclipse path ?? ?ct such dramatic results. ?? ?servtions should prove ?? for a more complete ?? the sun. As their data ?? models of the sun im? ?? ?tivity and the earth's ?? become more predict? ??
?? of astronomers from ?? ?llege Observatory and ?? ?neighbor, the Smith? ?? ?physical Observatory, will ?? ?ng our major experi? ??
international team including ?? M. Reeves and William H. ?? ?son, lecturers in Astronomy, ?? have two ultra-violet light de? ?? ?s aboard one of the 33 rockets ?? ?NASA inteds to fire from Wal? ?? Island. Virginia, tomorrow. The ?? ?ll be used to photograph the ?? or chromosphere as ?? ?ls into the eclipse ?? ?? of light ?? rocket's cameras ?? ?he chemical finger? ?? identify the reactions ?? that region of the sun. ?? ?mosphere is only visible for a few seconds during a total eclipse before the moon covers up the thin layer.
The same group of Harvard astronomers will use their ultra-violet experiment aboard the Orbiting Solar Observatory VI satellite to make simultaneous observations of the sun.
In the Mexican village of Miahuatlan, another group-headed by Donald H. Menzel, Paine Professor of Practical Astronomy-will make ground-based observations of the sun's corona. Jay M. Pasachoff '63, research associate in Astrophysics, will photograph the corona's visible light with a special telescope.
Another group, under Winfield W. Salisbury, lecturer in Astronomy, will take television pictures of the corona to study the light waves orientation or polarization and calculate variations in the sun's magnetic field in the corona.
PASACHOFF had also proposed that NASA and Air Force use the SR-71, a high-flying reconnaissance plane, during the eclipse. Since the SR-71 can attain speeds of at least 2000 miles per hour-several hundred miles faster than the eclipse shadow at some points-it could prolong eclipse observation-time by an hour or more. The jet could also position itself anywhere within the moon's shadow. Sci? ?? ?? ?? ??
Cruising at a heig? ?? the SR-71 would also be high e? ?? to observe some ultra-violet and infrared wavelengths of light that the atmosphere obscures at lower altitudes.
Federal budget stringencies apparently prevented the project this time, but shortly before leaving for Mexico. Pasachoff said that an SR-71 or SST modified for eclipse work may well fly within the next few years.
Two instrument-laden jets will be following the eclipse tomorrow but traveling at 600 mph, they are too slow to extend totality by more than a few minutes.
FOR most earthlings with less exotic plans, a total solar eclipse is a once-in-a-lifetime experience. It occurs only once every 360 years at any one place on the earth's surface, and the eastern U. S. can't expect another one in this century. "So we recommend that any one within comminuting distance of Nantucket or Norfolk. Virginia, make it," Pasachoff said, in a burst of enthusiasm that is typical of the spacemen who populate Observatory Hill. "Don't settle for 98 per cent."