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The Cambridge Guide to Astronomical Discovery states that Practical Astronomy with your Calculator is a "must"-have book if one has no personal computer for astronomical calculations. [4] New Scientist magazine gave a favourable review of the book, although stating that there were small errors in some calculations. [5]
An online star chart; Monthly sky maps for every location on Earth Archived 2007-09-13 at the Wayback Machine; The Evening Sky Map – Free monthly star charts and calendar for northern hemisphere, southern hemisphere, and equatorial sky watchers. Sky Map Online – Free interactive star chart (showing over 1.2 million stars up to magnitude 12)
Package Name Pro. Am. Interface Connects to Online (e.g. VO) Data Displays or Manip. FITS Images Tiled Multi-Resolution All-Sky image Handling Displays
sc is a cross-platform, free, TUI, spreadsheet and calculator application that runs on Unix and Unix-like operating systems. It has also been ported to Windows. It can be accessed through a terminal emulator, and has a simple interface and keyboard shortcuts resembling the key bindings of the Vim text editor. It can be used in a similar manner ...
Skyglobe accounts for the earth's precession in its calculations and should therefore be accurate to tens of thousands of years in the past and the future, but its manual does warn that the positions of planets might not be accurate throughout this range (it says "their coordinates are approximately correct for as far back and forward as we have data").
This template has one named and up to two unnamed parameters; the named parameter type determines the calculation, while the unnamed parameter(s) are the values to be input into the equation. If the unit R ☉ is desired, use |unit=yes and optional |link=y .
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
The title can be translated as "celestial plane" or "star chart". In this work Ptolemy explored the mathematics of mapping figures inscribed in the celestial sphere onto a plane by what is now known as stereographic projection. This method of projection preserves the properties of circles.