The tweet archive.

“Thanks on behalf of @SpaceX team! We ♥️♥️♥️ @NASA!”

“The Falcons have landed https://t.co/BGQRNuYMVH”

“@NASAGoddard @SpaceX .@SpaceX team would be so honored to fly this for @NASA!”

“@SpaceX Upper atmospheric wind shear is very high. Will have to postpone launch unless weather improves soon.”

“@CdeCiencia First flight for Falcon Heavy Block 5 means there is some risk of failure between 5% to 10% imo. Many good design improvements from Falcon Heavy demo, but the changes are unproven.”

“Max thrust of 2550 tons will be almost 10% higher than Falcon Heavy demo mission last year”

“Static fire data looks good so far. This is first launch of Falcon Heavy Block 5, so we’re being extra cautious. Launch date might move.”

“@marshgre @NickBre58305797 @letsrebel1 @paul_rocchini @markbspiegel @Tesla Like the movie Us. Scary … but also empathetic.”

“@TeslaAnswers @flcnhvy @Erdayastronaut @DiscoverMag We’re going to try. Side boosters come back to Cape, center core lands on droneship. Latter will be coming in v hot & fast, so dicey.”

“@flcnhvy @Erdayastronaut @DiscoverMag Annoying that @ULA perpetuates myth that Delta IV Heavy or Atlas V can do some orbits that Falcon Heavy can’t. This is absolutely false. FH would have to go full expendable for GEO direct, but that’s very rare.”

“@Erdayastronaut @DiscoverMag Probably no fairing either & just 3 Raptor Vacuum engines. Mass ratio of ~30 (1200 tons full, 40 tons empty) with Isp of 380. Then drop a few dozen modified Starlink satellites from empty engine bays with ~1600 Isp, MR 2. Spread out, see what’s there. Not impossible.”

“@nextspaceflight @Erdayastronaut @DiscoverMag Yes. Sensitive propulsion & avionics remained dry. Great work by SpaceX Dragon engineering team. Major improvement over Dragon 1.”

“@Erdayastronaut @DiscoverMag Massive delta velocity slam from highly elliptical Earth orbit using a fully retanked, but lightened up Starship with no heat shield or fins/legs. Best choice for the impatient. Ion engines are too slow.”

“@WorldAndScience It’s possible to make a self-sustaining city on Mars by 2050, if we start in 5 years & take 10 orbital synchronizations”

“@SidewalkSciGuy @SpacexFan9876 @Erdayastronaut @Sloppy93 @annerajb @flcnhvy @austinbarnard45 Falcon rocket booster is aluminum-lithium & carbon fiber, which have low max temperature allowables. Super Heavy booster is stainless steel. Since it only goes to around Mach 8 or 9, moreover at high altitude, it needs no heat shield, not even paint.”

“@Some1gg Transpiration cooling will be added wherever we see erosion of the shield. Starship needs to be ready to fly again immediately after landing. Zero refurbishment.”

“Testing Starship heatshield hex tiles https://t.co/PycE9VthxQ”

“@annerajb @Erdayastronaut @flcnhvy @austinbarnard45 We decided to skip building a new nosecone for Hopper. Don’t need it. What you see being built is the orbital Starship vehicle.”

“@Erdayastronaut @flcnhvy @austinbarnard45 You can deep throttle on single shaft system by choking flow of fuel or oxygen between pump & combustion chamber. Problem is more with the tiny rocket engine that powers the pump, called a gas generator. That has to throttle *way* deeper than the main chamber.”

“@nextspaceflight @Erdayastronaut @flcnhvy @austinbarnard45 Working on regulatory approval for both Boca Chica, Texas, and Cape Kennedy, Florida. Will also be building Starship & Super Heavy simultaneously in both locations.”

“@Drew78823936 @Erdayastronaut @DJSnM @RocketTenor @NASA @SpaceX @Space_Station @Commercial_Crew Probably right. Starship rate of progress far exceeds Falcon & Dragon, although they’re critical to getting there. dInnovation/dt is what matters long-term.”

“@DJSnM @RocketTenor @NASA @SpaceX @Space_Station @Commercial_Crew For cargo missions, propulsive land landing should be no problem. Doesn’t have same safety criticality as crew.”

“@dmk184 @NASA @SpaceX @Space_Station @Commercial_Crew Pretty much any moon or planet that has a solid or liquid surface”

“@iamkostmos @NASA @SpaceX @Space_Station @Commercial_Crew Most likely, but this is contingent upon NASA review & approval”

“@xandriteme @NASA @SpaceX @Space_Station @Commercial_Crew Best to use a giant brake pad, aka heat shield”

“@ajithshan03 @NASA @SpaceX @Space_Station @Commercial_Crew No”

“@NASA @SpaceX @Space_Station @Commercial_Crew Dragon 2 was designed to land using thrusters, with parachutes as backup. Switched to chutes as primary, due to difficulty of proving safety, but Dragon can still do it. https://t.co/Mr7VFIQwWf https://m.youtube.com/watch?v=07Pm8ZY0XJI”

“@roscosmos @Rogozin @JimBridenstine Thank you on behalf of SpaceX! We have always admired your rocket/spacecraft technology.”

“@BarackObama @NASA @SpaceX @Commercial_Crew Thank you on behalf of the people of SpaceX!”

“Russia has excellent rocket engineering & best engine currently flying. Reusable version of their new Angara rocket would be great. https://t.co/6RLvf5R4ni https://arstechnica.com/science/2019/03/with-dragon-russian-critic-says-roscosmos-acting-left-behind/”

“SpaceX team in Hawthorne control, Dragon docked to Station above https://t.co/JUWkOrWjsH”

“SpaceX Crew Dragon has docked with International @Space_Station https://t.co/CccsItLLvJ”

“Proximity docking sequence underway. Dragon shadow visible on on @Space_Station solar arrays. https://t.co/ELsxgLIvf0”

“@BoeingCEO @SpaceX @Commercial_Crew @NASA @Space_Station Thank you. May you have good luck and godspeed with your spacecraft!”

“@realDonaldTrump Thank you on behalf of SpaceX. Also, thank you to @NASA, without whom this would not be possible.”

“@VP @POTUS @NASA @SpaceX Thank you on behalf of the many people of SpaceX”

“@fhurst4762 @SpaceX @Space_Station Lightning bolt right before launch”

“@raulv48 @bryanMackSC @Tesla Need to get back to SpaceX launch control. Sorry this solution isn’t perfect.”

“@MihaRekar @SpaceX Haha”

“Make the Mars Technocracy real”

“@NASASpaceflight @flcnhvy @rogiermaas @SpaceX Yes”

“@katlinegrey @lrocket @Alexis_wwww Rest of SpaceX propulsion still very active, so only ~50 full-time equivalent people right now. That will grow a lot as we enter production. It’s 10X harder (at least) to design engine production system than engine. In automotive, 100X harder.”

“@annerajb @lrocket @Alexis_wwww @katlinegrey Printers are too small. Also, high pressure, high efficiency engines need copper cooling channels with an inco/steel jacket. Can’t print yet.”

“@lrocket @Alexis_wwww @katlinegrey Tom did an awesome job leading Merlin, Kestrel, Draco & other engine developments from start through 2014 that were critical to SpaceX’s success. Great respect & appreciation!”

“@flcnhvy @rogiermaas @SpaceX Focusing on Starship instead”

“@rogiermaas @SpaceX Deorbits & burns up over the Pacific”

“@Erdayastronaut @CanzyD Upper stage is flight, except mass sim in place of Merlin. It will get fragged for sure by aero loads & Dragon abort thrusters.”

“@SpaceXUpdates @CanzyD Including Heavy, which is 3 cores, around 20 or so”

“@nextspaceflight Depends on when Crew Dragon comes back. That’s scheduled for launch next Saturday, but lot of new hardware, so time error bars are big.”

“@CanzyD High probability of this particular rocket getting destroyed by Dragon supersonic abort test. Otherwise, at least 20 or 30 missions for Falcon 9. Starship will take over before the F9 fleet reaches end of life.”