Me too, but it's the percentage of those who currently own a car. I guess, in NL the percentage of people who own a car is less than e.g. in Germany.
I'm also surprised that the share in the US is quite high.

Considering their instance, I'd assume they're more out of their mind than huffing Elmo.

Another important part in this argumentation is that each type of telescope has its use case:
Extraterrestrial telescopes, as they are not objected by atmospheric blur can obtain much better 'images' from the cosmos even of weak, low brightness signals, which makes them best for observing the 'far' cosmos until the boundaries of recognition.
Yet, they are and always will be much more expensive and more difficult to maintain than terrestrial telescopes. Thus, using them for observing our cosmic front yard, the milky way, is like shooting with canons at sparrows.
Due to their cost, extraterrestrial telescopes also will always be 'few', too few to effectively keep track of the objects around us. Thus, 'cheap' terrestrial telescopes, large professional ones and small ones run by amateurs, will always be needed to observe the objects 'closely' around us, i.e. in our galaxis.

Don't forget important discoveries are also made by or with the help of amateurs, who permanently observe the night sky and measure the coordinates, i.e. the relative positions, of luminating objects. This allows others, mostly professionals, to calculate their motions and obtain information about the (hidden) masses, i.e. luminating and non luminating objects, inducing and influencing them. By this means, black holes, 'dark' masses, or asteroids, 'fast' moving illuminated objects, have been and are beeing discovered.

The number of satellites in orbit around Earth is rapidly increasing, with some 100,000 expected to be in place by 2030. And as their numbers grow, so does the difficulty of observing the universe from Earth.

Starlink’s satellites are bright enough that astronomers have decried them as an existential threat for as long as SpaceX has been launching them into orbit. While the company has taken some measures to mitigate how shiny they appear from Earth, their increased number and the many other satellites being launched means that their light pollution is “threatening the entirety of ground-based astronomy in every wavelength and in different ways,” astronomers told the BBC. There is a fear that soon, space observation might begin to look like a “windshield of bugs,” and become unfeasible, a researcher at the Vera C. Rubin Observatory in Chile told The New York Times.

So basically, at least during the rest of this decade, our billion dollar telescopes, radio and optical, are blind on different frequencies or are only able to obtain diffuse resolution.

source

NL

• definitely yes: 3 %
• probably yes: 15 %

USA

• definitely yes: 11 %
• probably yes: 17 %

The data is from this (the link is in the source) survey.

Germany:

• definitely yes: 14 %
• probably yes: 17 %

However there's a reason why the boiler room is usually locked off in a 30 story building. Bleeding a radiator might be relatively harmless, but there's no way of knowing what the pressure is supposed to be without knowing the entire system.

Exactly. That's why either the janitor knows the correct pressure or they need to call a technician. Definitely not something to have hands on oneself in a building that's not yours.

Usually, at the ~~heating~~ boiler, there is a junction for a hose with a valve and close by a pressure meter. If the pressure is too low, the janitor (not you) should fill up the heating system with water until the pressure is sufficient. Ideally, the pressure should be checked again after bleeding the radiators.

OK, TY. I've thought, there were just downloader packages, containing scripts to download the firmware binary from the device manufacturer and install it on the system, like e.g. the one for the Broadcom wireless driver.

Sorry, I mixed that up. It was named Canonical partner or something like that and contained only binary packages. Debian contrib are free packages with dependencies in non-free. While non-free are packages with not DFSG compliant source code (but with source code).

In principle yes, as Ubuntu is derived from Debian Sid, but with modifications to make it stable. Thus, the sources they are built from are different and hence, not completely binary compatible, like e.g. *Ubuntu and Mint or Debian and LMDE are. The configuration settings different also here and there and thus, guides for Ubuntu are not 1:1 transferable to Debian and vice versa.

For the conflicting package names, there is at least the solution to pin the sources.list from the PPA with a higher priority than the official Ubuntu repository. This would work even package-wise.