It’s not often that this happens, but solar activity has forced Blue Origin to scrub today’s launch attempt of New Glenn from Cape Canaveral.

Solar activity has been quite high in the past few days as sunspot 4274 has created coronal mass ejection events this week. Last night, aurorae were visible as far south as Central Florida, and that electrical activity is not good for rockets and payloads. According to NOAA, that activity is set to continue today:

The culprit is sunspot 4274 (circled in the solar disk photo above), which is nearing the solar horizon and will rotate with the sun to its side facing away from Earth. Today, however, is going be a busy one insofar as solar activity, according to NOAA’s Space Weather Prediction Center. That necessitated a launch delay.

When Will Blue Origin Try Again?

As their post on X states, Blue Origin is looking at dates and working with officials at the Eastern Range to determine a new launch date for New Glenn. Space Weather is of course a current concern, but their launch date may be affected by United Launch Alliance’s next attempt to launch Atlas V and the ViaSat-3 mission, currently scheduled for tomorrow night.

That’s where it gets sticky: ULA might also be forced to cancel their launch attempt for the same reason Blue Origin scrubbed today: solar storms affecting Earth’s atmosphere. Forecasters at Spaceweather.com posted today that, “Last night’s severe (G4) geomagnetic storm is subsiding, but the action is not over. Earth’s magnetic field is still reverberating from a double-strike of CMEs on Nov. 11th. A third CME is expected to hit Earth on Nov. 12th, elevating storm levels back to G3/G4.” How long that lasts will determine ULA’s plan and whether they have to push their launch.

Should that happen, there will be some congestion on the Range, and at that point, priorities will need to be assigned. Stay tuned,

Why Does Solar Weather Matter To Rockets?

Solar activity can disrupt the communications and navigation systems that ascending rockets rely on. Radio bursts from solar flares add noise to tracking radars and telemetry links, while geomagnetic storms disturb the ionosphere, degrading GPS accuracy used by guidance and range safety. These events also heat the upper atmosphere, increasing drag and altering ascent conditions, complicating performance predictions.

Launch operators monitor space-weather alerts and compare conditions to launch commit criteria; when space weather indices are elevated, they may delay to keep comms, navigation, and environmental margins within acceptable limits. In other words, it’s electrical activity that can scramble vital communications and control.

Blue Origin and NASA did just that, wisely not taking these risks lightly and choosing to wait for the storms to fade and the atmosphere to calm before launching New Glenn.

As the old saying goes: “It’s better to be on the ground wishing you were in the air, than in the air wishing you were on the ground.”