I generally use Wikipedia dictionary because it's updated. I have the Encyclopedia Britannica 15th edition. I also have the Encyclopedia Britannica blue leather 24 volumes from 1950's thanks to my grand-father.
Do you find black holes fascinating, as in regions of space where a star has collapsed in on itself and the normal rules of the Universe don't apply? 😮 Would you ever want to view one from the inside - if it was possible to do so without being ripped into lots of tiny spaghetti like particles?? ⚫