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7:30 PM PDT is about 20 mins after sunset so it should not take the launcher and contrail too long to find sunshine.   

Hopefully it goes on its first attempt.
Rough calculation gives sunlight at about 5 miles up. To reach that altitude won't take long at all.
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General Discussion / Re: Flight crew assignments
« Last post by John_Marshall on Today at 03:28 pm »
I wonder who Pettit's backup will be?

Jonny Kim or Anne McClain, perhaps?

Jonny Kim training in Star City (see my post in the Unassigned Astronauts thread from the 17th) would seem to imply that it is him.
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https://www.ulalaunch.com/missions/next-launch/delta-iv-heavy-nrol-70
Mar 28 12:04 EDT
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A current check of the local weather conditions at Cape Canaveral shows that the launch weather rules for cumulus clouds, disturbed weather and flight through precipitation are RED as a cold front moves quickly over the Cape.
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Awkward landing aside, pleasantly surprising.
That wasn't awkward. It was miraculous. It blew off one of its two engine nozzles late in the descent, resulting in totally out-of-spec asymmetric thrust, and the autonomous landing software somehow managed to land anyway. If you had asked almost anyone in the space community if this was possible, I think the answer would be "no chance".
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https://twitter.com/julia_bergeron/status/1773384178689626480

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The Beast venting as the weather plays an all too familiar game of launch day thread the needle.

@NASASpaceflight stream link:
youtube.com/live/HmYYhRBCw…

#NROL70 #Delta
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Awkward landing aside, pleasantly surprising.
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Space Science Coverage / Re: Europa Clipper
« Last post by redliox on Today at 03:11 pm »
Very excited it's nearly ready for Florida!
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https://twitter.com/ulalaunch/status/1773378859045404724

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ULA Launch Director Tom Heter III has instructed the launch team to coordinate a new liftoff time of 2:45pmEDT (1845 UTC) for the #DeltaIVHeavy rocket on the #NROL70 mission from Cape Canaveral. bit.ly/div_nrol70
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it could and it would add more than 50% delta v to starship, but refueling it in orbit wouldn't be any more efficient than refueling just a starship that sits in higher energy orbit (so it is equivalent to starship+superheavy in low orbit)
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Withdraw from OST would take much more than the stroke of a pen, it would require consent of Senate and approval of the President, it's a major political undertaking.
That is incorrect. The Senate ratified the treaty in 1967, including and approving its Article XVI withdrawal provision. The President can submit notification of withdrawal to the repository nations (UK, Russia, and the US) and it would take effect in a year. The Senate would not be involved in any way - in particular, the Senate is not required to "ratify" withdrawal.

A useful comparison is the U.S. decision to withdraw from the signed-and-ratified INF Treaty in 2019.
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