I’m Anthony Colangelo.

I used to write frequently, but now it’s just occasionally.

Formerly: A List Apart, Cognition, Main Engine Cut Off.

Video of Two Lunar Impacts

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“On 17 July 2018, an ancient lump from space thwacked into the Moon with enough energy to produce a brilliant flash of light. With another space rock seemingly in pursuit, a second flash lit up a different region of the Moon almost exactly 24 hours later.”

EELV LSA Selection “Sometime in August”

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This Vulcan double-submission theory is something I’ve speculated about on the podcast and elsewhere in the past few months. The fact that we aren’t hearing the engine selection until the award announcement has me nearly completely convinced that’s the case.

Thanks to July Patrons

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Very special thanks to the 217 of you out there supporting Main Engine Cut Off on Patreon for the month of July. Your support keeps this blog and podcast going, and most importantly, it keeps it independent.

Astra Launched, Learned Something

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Speaking of early shutdowns, Astra launched just about two weeks ago, but the results are unclear—the FAA stated there was a mishap, and Alaska Aerospace told SpaceNews that “the customer is very pleased with the outcome of the launch.”

Boeing’s Sticky Situation

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There’s still some murkiness here. Was the 1.5-second firing the full duration that they were aiming for with this test, or did it shut down early? I’ve heard the latter.