Jay M. Pasachoff is an astronomer at Williams College. He is chair of the Working Group on Solar Eclipses of the International Astronomical Union. His work is funded by the National Geographic Society and the National Science Foundation.
Total Solar Eclipse Offers Rare Chance to Understand the Sun’s Atmosphere
The first total solar eclipse to cross the U.S. from coast to coast in 99 years is not only a must-see spectacle but also a valuable scientific opportunity
Deuterium in the Universe
All the heavy hydrogen in space may have been made in the first 15 minutes after the "big bang". Observations leading to estimates of its abundance thus provide evidence on conditions at that time
The Solar Corona
The physical nature of the sun's outer atmosphere is emerging from observations made not only on the ground during eclipses but also from rockets, from satellites and even from the moon