Profile of this 17th-century astronomer discusses his connection to Sir Isaac Newton as well as his travel to St Helena to chart constellations.

Scientists' biographical resource profiles Oxford's Savilian Professor and the man who discovered the periodicity of comets.

Supplies basic biographical statistics and provides such categories as religion, scientific disciplines and means of support.

Famed astronomer was the first to accurately measure the elliptical orbits of comets and to predict the return of one, now called Halley's Comet.

Profiles the astronomer who showed that comets travel around the sun.