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Diclaimer: This is not (yet) an answer! To attract answers, I decided to start an answer draft which can be expanded by others. Cylindrical coordinates Every point in our cylindrical coordinate system …

For me, it looks indeed very much like an interpolation, both from what I see and how the caption is formulated. Also: If it would be scientific simulation results, I would have expected whatever the …

I have to admit that power-laws (in general) used to be my shtick so I am happy to shed some light on their general importance in physics which obviously also hold for astronomy. The main idea of a po …

Reading Calculating area of visible sky I started wondering which portion of the sky one could observe how long given the 3D coordinates of an observatory, and two points in time. In other words, I wo …

ProfRob's comment is actually already the answer: Unless you can linearise the model, there is no analytic error estimate. I consider error estimation very important, so I would like to show a bit m …

References The mathematics of egg shape gives a brief mathematical background about one of my favorite mathematical objects Cylindrical symmetry is not as hypothetical as it might sound: Ashley Strickland …

I was struggeling to understand 2080's question, so I looked up the given reference which might be worth re-quoting: With this additional information in hand, the question (initially) seemed to be ma …

My first approach would be to visit my local university library, ask for the physics section and look which books are available, e.g. with the title gravitational waves in the physics or science depar …

The National Radio Astronomy Observatory's Q&A "How To Make Images With a Radio Telescope" says The most straightforward way to make a radio image with your satellite antenna system, then, is to use …

Theoretically, using a Raspberry Pi, (at least) one mirror, and two motors, one should be able to build a heliostat, i.e. a device which redirects sunlight to a fixed spot, like a scrub in the shadow …

There are various pop-science article entitled Are we living in a Black Hole? or Did A Black Hole Give Birth To Our Universe? which say things like There’s a lot to like about the idea that there’s a …

Calculating the exact time of the vernal equinox is essential for many ephemeris calculations. NASA Goddard Institute for Space Studies uses (at least for some purposes) the following, rather short so …