Biography
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Biography
Cook, James (1728–1779)
Biography
Harrison, John (1693–1776)
Biography
Lacaille, Nicolas Louis de (1713–1762)
Biography
Lesseps, Ferdinand Marie (1805–1894)
Biography
Maskelyne, Nevil (1732–1811)
Biography
Maury, Matthew Fontaine (1806–1873)
Biography
Mayer, Johann Tobias (1723–1762)
Biography
Ptolemy, (Claudius Ptolemaeus) (lived AD 2nd century)
Briefing
Progress in developing x-ray pulsar-based navigation (XNAV) Published in 2018
In early 2018, NASA announced that it had demonstrated a new type of celestial navigation for the first time. Called XNAV, for x-ray pulsar-based navigation, it relies on beams of radiation from pulsars—the cinders of exploded, massive stars. As…
