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What to know about Relativity's third attempt at launching the first 3D-printed rocket

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Update: Relativity Space's Terran 1 rocket successfully launched from Cape Canaveral at 11:25 p.m. EDT Wednesday, March 22, and achieved most of the company's demo mission milestones before a second stage anomaly cut the rest short. Overall, the flight known as "Good Luck, Have Fun" was successful beyond what Relativity had initially hoped.

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Relativity Space is still targeting this week for the third attempt at launching the world's first 3D-printed rocket after earlier shots were scrubbed due to weather, range, and technical issues at Cape Canaveral Space Force Station.

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If everything goes according to plan, the 110-foot Terran 1 rocket is slated to fly Wednesday, March 22, during a three-hour window that opens at 10 p.m. EDT. The Cape's Launch Complex 16 will host. Here's what to know about the launch:

What's the weather forecast?

Conditions during the window, according to the Space Force's Space Launch Delta 45, should be 95% "go" for liftoff. The only listed concern was the possible formation of cumulus clouds above the pad.

"Favorable weather looks to be in place for the launch attempt Wednesday night," forecasters said Tuesday. "Expect partly cloudy skies in the area so there is a slight concern for the cumulus cloud rule, but the overall coverage should diminish through the late afternoon and early evening hours tomorrow."

Conditions around the Cape should be nice, especially for spectators: 67 degrees at 81% humidity.

Is this Relativity's first launch? What are the goals?

After second scrub:Relativity working technical issues ahead of next 3D-printed rocket launch attempt

Rocket launch schedule:Upcoming Florida launches and landings

Latest SpaceX launch:Falcon 9 flies two communications satellites from Cape Canaveral

Wednesday's mission, named "Good Luck, Have Fun" or "GLHF," is the first launch of Terran 1 and for Relativity overall. The privately held company has raised billions so far, so this mission is crucial to its continued success.