11.4 A simple two-dimensional simulation.We will use some application software in the following, namely SAOImage DS9 for images and TOPCAT for operations involving tables. But in astronomical research, application software is usually not enough. For simple image operations you might get by with firing up the DS9 software, for instance. 3D CHARTS IN R SKYCHART SOFTWAREīut at some point, sooner rather than later, you will want to do something more specialised, and more automatised, than application software can provide. ![]() In some of the simplest cases, you might get away with loading the catalogue in Microsoft Excel and start analyzing your data in there. But in all other cases, including almost all of the interesting ones, your analysis will need a little more flexibility. ![]() That is when, again, you start writing a bit of code that helps you choose the right entries from the catalogues, and to produce helpful diagrams – plots and histograms – that allow you to make sense of your data. Then it becomes time to make use of a different kind of tool: 3D CHARTS IN R SKYCHART CODE What qualifies as a routine operation will depend on context, of course. Specialised astronomical modules provide you with tools for higher-level operations that are routine in astronomy, but not elsewhere. An ephemeris module will help you find the position of Solar System Bodies, for instance. Some routines may be adapted to a specific telescope, allowing you to reduce and analyze that telescope’s data. While you are still learning, you will want to avoid some of those higer-level modules and re-invent at least some of the wheels in question, since writing a routine for completing some specified astronomical task is a good way of understanding what that particular task, and the astronomy behind it.
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