On March 6, 1986, the Soviet Union's Vega 1 spacecraft flew by Halley's Comet. Vega 1 was the first of five missions to fly by Halley's Comet in the same month. This fleet of spacecraft has been ...

Halley recognized that the method as he proposed ... and worthy the thoughts of the Royal Society, 1 shall take leave to propose an expedient for determining * u Chemical Denudation in Relation ...

In August 1684 a handsome young astronomer named Edmond Halley boarded the London coach for Cambridge and sat back to ponder the events that had set him on an important mission. Earlier in the ...