Far from the Stars - in the Midst of Astronomy
Foerster Lectures on the Immortality of the Soul
Charles M. and Martha Hitchcock Lectures
Howison Lectures in Philosophy
Jefferson Memorial Lectures
Bernard Moses Memorial Lecture
Carl O. Sauer Memorial Lecture
Barbara Weinstock Lectures on the Morals of Trade
Hendrik van de Hulst was a Dutch astronomer and mathematician. He predicted the existence of the 21 cm hyperfine line of neutral interstellar hydrogen. After the discovery of this line, he participated with Jan Oort and Alex Muller in the effort to use radio astronomy to map out the neutral hydrogen in our galaxy, thus revealing its spiral structure.