Nature

Azimuth Tables for the Higher Declinations (limits of declination 24° to 30°, both inclusive) between the parallels of latitude 0° and 60°, with Examples in the use of the ...

A LEADING feature of present-day methods of navigation is the use of tables. There is scarcely any method in use in navigation for which one, and probably many, tables, of more or less practical ...
Hackaday

Start Tracking Satellites With This Low-Cost Azimuth-Elevation Positioner

Tracking satellites and the ISS is pretty easy. All you really need is an SDR dongle or a handheld transceiver, a simple homebrew antenna, and a clear view of the sky. Point the antenna at the passing ...
Nature

The Willis Navigating Machine

AT a recent meeting of the Royal Astronomical Society, the capabilities of this ingenious instrument (aviation type), designed by Mr. E. Willis for the solution of spherical triangles, were ...
Science Daily

200 Years Later, Geologist Completes Lewis And Clark Readings

Virtual explorer Robert Criss, Ph.D., professor of earth and planetary sciences at Washington University in St. Louis, has teamed up with Lewis and Clark to provide the oldest determinations of the ...
Astronomy

What is the source of the term “right ascension”? Why is it right ascension and not simply ascension, as with declination?

Right ascension, a celestial coordinate dating back to Hipparchus, measures the east-west position of celestial objects along the celestial equator, starting from the vernal equinox. Right ascension, ...