33 ms·
Nitpick, "bya" means "billion years ago", probably not what you meant. Abbreviations for "billion years" include Gy (gigayear), Ga (giga-annum), and "byr" (less
by antonvs 5y ago
Nitpick, "bya" means "billion years ago", probably not what you meant. Abbreviations for "billion years" include Gy (gigayear), Ga (giga-annum), and "byr" (less common in my experience.)
- Zobat 5y agoAlso kind of nitpicking, the universe is about 13.8 Gy so 7 Gy would be half the age of the universe and not quite double the age of earth (~4.5 Gy).
- Aachen 5y agoI've most commonly seen a for year, so Ga for a billion years. Not sure who'd standardize this, does the SI have a guideline or standard for years? Either way, ya is indeed confusing.