Blue Origin announced late on Monday afternoon that it planned to make a second attempt to launch the New Glenn rocket at 1 am ET (06:00 UTC) on Tuesday. But then, a couple of hours later, the company said it would move the launch to Thursday.
Although the company provided no information about why it was slipping the launch two more days, it likely involved both technical work after an initial launch scrub on Monday morning and concerns about weather early on Tuesday.
In its short update on Monday afternoon, Blue Origin confirmed earlier reporting by Ars that the first launch attempt on Monday morning was scrubbed due to ice buildup on a vent line. "This morning’s scrub was due to ice forming in a purge line on an auxiliary power unit that powers some of our hydraulic systems," the company said.