why isn't my node showing

about (2): what about https://wiki.openstreetmap.org/wiki/Tag:man_made=observatory then?

First of all: Is Sterrenwacht De Polderster actually a permanent "observatory" facility with fixed equipment? It looks like a "observatory" organization to me.

well, all this is pretty demotivating... what a mess.

"De Polderster" is an astronomical organisation. the node contains observing equipment and is used by that organisation (see the website).

the query that I try to write to find back all these places is an indication of the problems that exist in trying to get astronomical organisations on the map...

``` ( node [man_made=observatory] ["observatory:type"="astronomical"] ({{bbox}}); way [man_made=observatory] ["observatory:type"="astronomical"] ({{bbox}}); area [man_made=observatory] ["observatory:type"="astronomical"] ({{bbox}}); relation [man_made=observatory] ["observatory:type"="astronomical"] ({{bbox}});

node [man_made=observatory] ({{bbox}}); way [man_made=observatory] ({{bbox}}); area [man_made=observatory] ({{bbox}}); relation [man_made=observatory] ({{bbox}});

/ node [man_made=telescope] ({{bbox}}); way [man_made=telescope] ({{bbox}}); area [man_made=telescope] ({{bbox}}); relation [man_made=telescope] ({{bbox}}); / ); /added by auto repair/ (._;>;); /end of auto repair/ out;```

Had your observatory, telescope or office been in the UK https://map.atownsend.org.uk/maps/map/map.html would show it.

If you want to render a map for NL based on that style, you're welcome to do so. Many other OSM-based maps exist - maybe some also cover NL and also show what you want?

To be fair to the people who look after the "standard" map tiles that you see by default at openstreetmap.org, there are conflicting requests - it has to look nice, be useful as a reference and also be "useful". Personally, I think that those are conflicting goals and impossible to achieve. Years ago there were two "standard" maps - a pretty one (which evolved into today's OSM Carto) and one that showed absolutely everything, but was "not quite so easy on the eye".