Bad weather plagued ULA's launch attempt Amazon throughout a two-hour flight window that opened at 7 p.m. EDT (2300 GMT). Launch controllers worked through some technical glitches, but were primarily concerned thick cumulus clouds and rain within 10 miles of the pad, which violated launch weather rules, ULA officials said.

Now that Amazon is joining the broadband internet satellite business, the number of satellites in Earth's orbit is about to get a lot bigger. A batch of 27 Kuiper satellites is scheduled to be launched aboard a United Launch Alliance Vulcan rocket from Cape Canaveral on Wednesday afternoon.