[wastedyears]

An expanding velocity that slow?

[ETL]

"Most of the Bullet has an expanding motion with a speed of 31 miles per second, but the tip of the Bullet has a speed of 75 miles per second,"

An expanding velocity that slow?

Does seem very slow for this sort of thing. The earth orbits the sun at about 18 miles per second. And the sun orbits our Milky Way galaxy at roughly 130 miles per sec.