Firefly Aerospace’s Alpha rocket reaches orbit on 1st launch since explosive accidents last year (video)

Texas-based Firefly Aerospace is celebrating today (March 11) after successfully launching its Alpha rocket for the first time in nearly a year.

Today’s mission, called “Stairway to Seven,” was the seventh flight for Alpha, which suffered two major mishaps during 2025. The first occurred during the “Message in a Booster” mission last April, which carried a technology-demonstrating satellite for Lockheed Martin but failed to deliver it to orbit after an anomaly occurred during stage separation.

Then, last September, an Alpha first stage exploded on the stand during prelaunch tests for “Stairway to Seven.” This mishap added months to the mission development timeline as the company investigated a cause and got another booster ready for flight.

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The test-stand explosion was eventually traced to “a process error during stage one integration that resulted in a minute hydrocarbon contamination,” according to a Firefly update in November, which ruled out a design flaw in the rocket and cleared its path back to the launch pad.

Nevertheless, Firefly changed “Stairway to Seven.” The company reframed it as a test flight, focusing on achieving “nominal first and second stage performance,” according to a mission description.

“Stairway to Seven” took to this skies this evening (March 11) from Space Launch Complex-2 at Vandenberg Space Force Base in California, with liftoff at 8:50 p.m. ET (0050 GMT on March 12).

At approximately 2 minutes, 40 seconds into flight, Alpha successfully executed first-stage separation, jettisoning its main booster as the rocket’s upper stage continued powering its way to orbit.

Following fairing ejection about 30 seconds later, Alpha cut off its upper-stage engine about 8 minutes after liftoff and reached orbit as planned, 151 miles (243 kilometers) above Earth.

“Mission success! Alpha Flight 7 achieved nominal performance and validated key systems ahead of our Block II configuration upgrade. This test flight also delivered a demonstrator payload for @LockheedMartin. Congratulations to the entire Stairway to Seven team!” Firefly wrote via X after the flight.

Having now successfully climbed the “Stairway to Seven,” Firefly will retire Alpha’s Block I configuration, as it continues upgrading the launch vehicle to enhance its capabilities.

More than just a requalification flight, Firefly says Alpha’s seventh launch served to “test and validate key systems ahead of Firefly’s Block II configuration,” which is slated to debut on Flight 8.

Alpha Block II will stand about 7 feet (2.13 meters) taller than its 96.7-foot-tall (29.6-m) predecessor and will feature upgraded avionics and power systems, as well as improved thermal protections.

Today’s launch was a significant step forward for Firefly, which has excelled in some areas of its space business more than others. Last year, the company’s uncrewed Blue Ghost moon lander became the first private spacecraft to successfully complete a mission on the lunar surface, but Alpha has now managed full mission success just three times in its seven orbital launch attempts.

Editor’s note: This story was updated at 12:30 a.m. ET on March 12 to include Firefly’s post-launch X post.