Recent comments in /f/space

Kellymcdonald78 t1_j6advot wrote

Reply to comment by Correct_Inspection25 in NASA's 'Mega Moon Rocket' aced first flight and is ready for crewed Artemis II launch by sasko12

And 16,800 to TMI (Trans Mars Injection). Folks who’ve done the delta V analysis puts the Falcon Heavy TLI performance at approximately 20,000kg

There is no part of SLS that enters into a “high rad” environment except the second stage and for Block I it’s a stage they’ve taken from Delta III. Please let me know exactly what is “rad hardened” on SLS

As well, system redundancy is the exact same method used on Starship, both as part of the Artemis program (as the lunar lander) and potential Mars missions. Crew Dragons are kept on ISS for months, they aren’t exactly “short duration missions”

2

Joseph_HTMP t1_j6ad4gb wrote

Reply to Why don’t we just make antimatter? by [deleted]

>if we can’t make antimatter

We can. It's produced at CERN all the time.

>why can’t we just make something that flips or rotates a particle?

That doesn't really mean anything as a sentence.

>I mean we could change it’s “behavior” right?

Sure? That's got nothing to do with antimatter though.

> I don’t know why but for me this makes a lot of sense

Because you're incredibly stoned? It doesn't make much sense in terms of the actual physics.

0

space-ModTeam t1_j6ad1cp wrote

Reply to Why don’t we just make antimatter? by [deleted]

Hello u/Midas-__-, your submission "Why don’t we just make antimatter?" has been removed from r/space because:

  • Such questions should be asked in the "All space questions" thread stickied at the top of the sub.

Please read the rules in the sidebar and check r/space for duplicate submissions before posting. If you have any questions about this removal please message the r/space moderators. Thank you.

1

Correct_Inspection25 t1_j6acuza wrote

Reply to comment by Kellymcdonald78 in NASA's 'Mega Moon Rocket' aced first flight and is ready for crewed Artemis II launch by sasko12

SpaceX and Wikipedia’s fact sheets would disagree with you. In fully disposable mode, Falcon Heavy can only get 26,000kg to Geosync orbit max, and much less to fast TLI. [NASA approached SpaceX for Falcon Heavy as an option in 2018, but SpaceX responded that slow cargo LTI would be 16,000, and maxed out at 18,000 for the theoretical max for the platform]. The block 1 27,000kg to TLI is like this month’s Starship test, no 100 ton test load to LEO, just an empty capsule with sensors and minimal load for proof of basic delievery and systems integration.)

SLS’s Artemis is rad hardened according to NASA and their results from their test mission.

SpaceX and other commercial crewed vehicles for short LEO mission are allowed to be exempted from Rad hardening using the redundancy you mentioned. Starship HLS will be Rad Hardened based on SpaceX’s latest submission to NASA, and will also use the Water and Fuel tanks in the lander for part of their Rad Hardening solution.

1

Sickcloudsbruv t1_j6acgud wrote

Reply to comment by [deleted] in In the event of a fatal manned mission (example Artemis 2), would exploration stop in this period? by damarisu

>skippyspk · 5 min. ago
>
>The government would sufficiently pay off the families of slain astronauts with dark money made from the illicit sale of crack from the CIA.If the families wanted to keep their government-provided fortune and not risk getting suicided then they’ll continue to espouse the narrative that we need to beat China on the moon.It happened with Owen Hart’s family, but on a much smaller scale and the players are slightly different, but the playbook remains the same.

You forgot to mention the lizard people

1

nicuramar t1_j6abs1h wrote

Reply to comment by SailingNaked in If you could instantaneously place a space telescope at any desired distance (LYs), from any planet/galaxy etc., where would it be and what would you be documenting? And for what purpose? by kennyarsen

> You and OP are still wrong,

I’m not OP or defending their views. I am just saying that expansion is stated as a rate, and doesn’t have units of velocity. I know how expansion works, and I wasn’t talking about that. You don’t need to keep explaining it, at least not for my sake :)

1

SyntheticSlime t1_j6aa4bk wrote

Reply to Earth's inner core may be slowing down, but “Nothing cataclysmic is happening,” says Hrvoje Tkalcic, a geophysicist at Australian National University. “The inner core is now more in sync with the rest of the planet than a decade ago when it was spinning a bit faster.” by clayt6

Is this why days have been shortening slightly? We used to need leap seconds at regular intervals, but they’ve been less common recently.

1

Correct_Inspection25 t1_j6a7zgp wrote

Reply to comment by CurtisLeow in NASA's 'Mega Moon Rocket' aced first flight and is ready for crewed Artemis II launch by sasko12

You said the Falcon Heavy was an alternative for SLS and it wasn’t going to work even if NASA dropped everything and paid SpaceX for everything. 7 years ago couldn’t meet basic SLS TLI payload/Delta V in full disposable mode means hasn’t ever been a viable SLS replacement for pounds to TLI, even if they had red dragon rad hardened at the time. Look at what SpaceX estimated the weight of Red Dragon, Falcon heavy couldn’t have delivered it to TLI fully loaded even for a reduced crew and scope, SpaceX was right to focus on using what they learned from the falcon Heavy’s failures and used the billions of Starship/Raptor NASA money on the next generation of Heavy Lift. https://en.m.wikipedia.org/wiki/SpaceX_Red_Dragon

3