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College students who are taking astronomy courses, please leave a comment! Astronomy is really interesting.
Astronomy enthusiasts said that the quotes are very professional. I have seen some of the content in "One Hundred Billions of Suns" in the First Promote Book Series, but the version here is a bit rougher and simpler. It is at the level of popular science. It is very good, simple and suitable for the public.
The clock is slow and the ruler is shrinking, hey hey hey Relativity is so interesting
I recommend "Soft Universe", it's great
A movie ad was inserted unexpectedly???
It's hard to read, there's something wrong with the paragraphs
Some people speculate that the universe is a perpetual motion machine, and that the singularity is preceded by the destruction and contraction of the previous universe.
Suddenly discovered the tags "mecha" and "food"??? False propaganda.
In the conversion method, the exponents behind scientific notation are missing.
Why is the parsec the unit of observation in Afghanistan?