mobilematters.gg on MSN

Last letter codes (January 2026)

Last Letter is one of those Roblox experiences that may be simple in nature, but it's actually quite a bit of fun. It's a ...
Astronomy on MSN

What is the origin of the letters used in star classification?

What is the origin of the letters used in star classification? Why didn't astronomers use ABCD? J. HaldimanChicago, Illinois Stellar spectral types originally followed alphabetical order. But as ...