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- Sun Jan 08, 2023 3:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Where Your Elements Came From (2023 Jan 08)
- Replies: 37
- Views: 7906
Re: APOD: Where Your Elements Came From (2023 Jan 08)
What does the BROWN shade mean (Polonium et al) ? These are all elements with very short half-lives, so they barely exist in nature. That is undoubtedly true, but not an answer to "what does the brown shade mean". I am not a real physicist, but I think by elimination it must mean that the...