Blue Origin’s New Glenn rocket launch was postponed Wednesday due to intense solar storms, which were also creating spectacular auroras across the U.S.

The rocket, carrying two NASA Mars orbiters from Florida, had already faced delays from poor weather.

NASA delayed the liftoff over concerns that heightened solar radiation could affect the spacecraft.

No new launch date has been announced, the AP has reported.

This would have been only the second flight of New Glenn, a 321-foot rocket much larger than Blue Origin’s New Shepard vehicles.