Recent comments in /f/space

ioncloud9 t1_jc819fr wrote

It would have to be moved really far up. Like around 1000km up to last decades without needing a reboost. And it would be out of control. It needs constant fuel to desaturate the reaction wheels and maintain orientation. Without that it would be spinning out of control until it broke apart. Then its a massive liability.

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dragonlax t1_jc7w155 wrote

That would require the invention of new heat shield tech, getting it up to space (it will be very heavy and horribly expensive to lift), then install it, add parachutes, flotation devices, etc. You’re talking tens of manned flights costing $100m+ each just to recycle 20+ year old tech, no use for it at all.

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Winjin t1_jc7uu6r wrote

I saw a great argument that Passengers were released the same year and suffered from miscast too.

Hilariously, if you swapped Chris Pratt with DeHaan both movies would be elevated. The scripts and directing would still be a major pain, but DeHaan as a sad creepy passenger and Pratt the Superhero Chad would work way better.

Also the recut Passengers would've been way better. And Rihanna scenes weren't needed.

Well, overall, both movies could be better, but the miscast idea still stands.

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Decronym t1_jc7tcye wrote

Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I've seen in this thread:

|Fewer Letters|More Letters| |-------|---------|---| |CoM|Center of Mass| |EDL|Entry/Descent/Landing| |KSP|Kerbal Space Program, the rocketry simulator| |LEO|Low Earth Orbit (180-2000km)| | |Law Enforcement Officer (most often mentioned during transport operations)| |LOX|Liquid Oxygen| |MECO|Main Engine Cut-Off| | |MainEngineCutOff podcast| |MRO|Mars Reconnaisance Orbiter| | |Maintenance, Repair and/or Overhaul| |SLS|Space Launch System heavy-lift|

|Jargon|Definition| |-------|---------|---| |Starlink|SpaceX's world-wide satellite broadband constellation| |cislunar|Between the Earth and Moon; within the Moon's orbit| |perigee|Lowest point in an elliptical orbit around the Earth (when the orbiter is fastest)|


^(11 acronyms in this thread; )^(the most compressed thread commented on today)^( has 14 acronyms.)
^([Thread #8688 for this sub, first seen 14th Mar 2023, 17:48]) ^[FAQ] ^([Full list]) ^[Contact] ^([Source code])

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rocketmonkee t1_jc7spqi wrote

> Why can’t they just use a Cygnus to do it?

Basically, that is what the Request for Information (RFI) is asking. NASA is proposing the idea to use natural orbital decay or propulsion from the Russian Segment, then use the "space tug" to take over for the final de-orbit burn, plus any attitude and Delta-V adjustments during the final de-orbit events.

This announcement is NASA's mechanism to ask the aerospace industry what it thinks, and for the aerospace industry to give ideas.

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Pharisaeus t1_jc7sg48 wrote

> Why can’t they just use a Cygnus to do it?

To small. You'd need something like fully loaded ESA ATV to deliver enough delta-v. Single biggest push ISS ever got was from https://en.wikipedia.org/wiki/Johannes_Kepler_ATV and with 4.5t of fuel (total theoretical payload capacity was 7.5t, but part of that was fuel for ISS, water and dry cargo allocation) it delivered less than 30m/s delta-v, raising orbit form 350 to 400km. Here you need about 50% more. So theoretically fully loaded with fuel it could make it. But that was the biggest resupply craft flying to the ISS.

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