Recent content by lpetrich

I don't know where that first number comes from, so I decided to calculate it. For 1 meter difference in elevation on our planet, time dilation is 1.09*10-16 or 3.44 nanoseconds per year. For 1 kilometer, that is 1.09*10-13 or 3.44 microseconds per year. Most of Australia's cities are on the...

Testing General Relativity with Pulsars - AAS Nova noting The Orbital-decay Test of General Relativity to the 2% Level with 6 yr VLBA Astrometry of the Double Neutron Star PSR J1537+1155 - IOPscience Earlier measurements of the inspiral rate had a 9% difference with GR. But it was difficult to...

Gravitational-wave emission Some neutron stars are in close binaries, and some of them are observed to be spiraling in to their companions. For a pulsar with mass m with a companion with mass m', total M = m + m', one observes to lowest order: Period - P = 2*pi/n - n is the mean motion or...

Reese Gorman on X: "Speaker Johnson on the chaos that went down at the Oversight markup last night: “It's not a good look for Congress. And as I've said a few times this morning, decorum is an important principle to maintain. And we're going to continue to try to advance that principle and we" /...

That New Republic article linked to some tweets: Senator John Fetterman on X: "In the past, I’ve described the U.S. House as The Jerry Springer Show. Today, I’m apologizing to The Jerry Springer Show. (pic link)" / X "CNN: House committee meeting devolves into chaos as Greene and Ocasio-Cortez...

Raskin says it’s ‘worth investigating’ whether House members were drinking in hearing room | The Hill Presumably CH3CH2OH, but that would explain a lot. Noting "Dumpster fire" hearing spurs groans about Congress' new low Van Jones rails against Greene after spat with Dems: ‘She’s a disgrace...

Rep. Marjorie Taylor Greene🇺🇸 on X: "Some people are upset ..." / X 🍿🍿🍿

Jasmine Crockett: Clip-ins are a kind of hair extension. They are attached to some of one's hair with the attachment being underneath some other hair. Then Robert Garcia D-CA, calling her remarks “horrific” and “disgusting”, saying that “I think there’s no question that Marjorie Taylor Greene...

Marjorie Taylor Greene fracas at hearing leaves lawmakers shaking their heads Speaker Mike Johnson R-LA: “It’s not a good look for Congress. Decorum is an important principle to maintain.” Lauren Boebert: Anna Paulina Luna: members must “grow up.” LB and APL went to NYC to visit their hero...

From the article: "The madness culminated Thursday night with a vote on whether or not to allow Greene to continue speaking during the hearing, which the panel ultimately granted in a 22-20 vote." Lauren Boebert R-CO was the only Republican to vote against doing so. She and MTG have not gotten...

Referring to a ruling that Oversight Committee head James Comer R-KY made about MTG's comments, JCkt said “I’m just curious, just to better understand your ruling. If someone on this committee then starts talking about somebody’s bleach blond bad built butch body, that would not be engaging in...

After a bit of argument about how to proceed, MTG agreed to strike down her words, but AOC demanded that MTG apologize to Jasmine Crockett D-TX, something that led to MTG insulting AOC. AOC: “I believe she needs to apologize.” MTG: “I’m not apologizing." AOC: “Well then you’re not striking...

Chaos erupts in House as Marjorie Taylor Greene, AOC clash over ‘fake eyelashes’ jibe at Jasmine Crockett On Thursday, May 16, some Republican Congresspeople went to New York City to visit their hero as he is being tried for hush-money fraudulence. When they returned that evening, they continued...

Readiness, other features: Chemical engines: 9 -- high thrust, low EEV Ion engines: 9 -- high EEV, low thrust Solar sails: 7 -- low thrust, no onboard propellant VASIMR: 5 -- high EEV, low to medium thrust (?) OP's system: 2 Solar sail - listed as 7 because the Planetary Society flights seem...

Adding to my list of successfully-flown rocket engines, I add (Aerozine 50) - NTO (Titan IIIE LR91): 3.1 km/s, 1.9 MN Its propellants: Aerozine 50 = half-half by weight of hydrazine and UDMH Hydrazine = N2H4 -- 2 C to 114 C UDMH = unsymmetrical dimethylhydrazine = (CH3)2N - NH2 -- -57 C to 64...