Chris Petersen

[SpaceX @SpaceX]

Watch Starship’s second integrated flight test https://t.co/cahoRQ72lm

[Chris Petersen @k9eq]

@xkcd Unfortunately the output of silicon solar cells decreases with increasing temperatures - a significant correction factor that was not considered in the equations. This the benefit of sol -mounted panels will be less than 22 million.

[Chris Petersen @k9eq]

@VE6LK Looks like a manufacturing or design defect. There is no positive pressure on the device connecting it to the heatsink underneath the PCB. The screws hold the PCB down, not the device.

[Chris Petersen @k9eq]

@ka9q I’m guessing this is why we invented fiber optics?

[Chris Petersen @k9eq]

@ka9q Unfortunately the balloon was heard from again after it was suppose to be shot down. It is just not reasonable that they would track and go after something so small.

[Chris Petersen @k9eq]

@m17_project A viable business model is required and is then followed by a big investment. Do they exist?

[Chris Petersen @k9eq]

@brettglass And you sampled my favorite episode. Filmed on Fisherman’s Wharf in Santa Barbara.

[Chris Petersen @k9eq]

@ea4gpz @ka9q @nascom1 @IanJohnBuckley @coastal8049 You would use the spacecraft’s public key. Authority is based on the entity that has physical access to the craft. A scientist might fake data to support an erroneous conclusion. Data might be altered or lost between the spacecraft and the user.

[Chris Petersen @k9eq]

@ka9q @nascom1 @ea4gpz @IanJohnBuckley @coastal8049 Authenticated data allow one to PROVE that the data came from the authenticated source long after the mission ends as well as proving it hasn’t changed. Don’t want fake science missions!

[Chris Petersen @k9eq]

@ka9q @nascom1 @ea4gpz @IanJohnBuckley @coastal8049 If it's data, it can be "encrypted". I would guess the data are also authenticated and verified using normal crypto techniques. So if you're using crypto, might as well make it private? Don't know how hackable Orion would be with plain text.

[Chris Petersen @k9eq]

@ka9q Maybe they’ll get smart and set costs according to supply - allow lower cost charging during the day while they are “curtailing “ excess solar power.

[Chris Petersen @k9eq]

@ThePlanetaryGuy @NASAInSight Some future mission may want to last longer. Why not test dust mitigation on a lander where it is not essential. I suspect a clever solution would add little weight and cost. At least that should be the goal.

[Chris Petersen @k9eq]

@elonmusk You might be rich. You might have power. You might be able to do many things. But there’s one thing you can’t do. You’re not invited to my birthday party!

[Chris Petersen @k9eq]

@GregScott_photo @chrfrde I think it’s fantastic! Thanks for your dedication!

[Chris Petersen @k9eq]

@SDGE Thank-you for your reply. You might be able to tell I’m a bit sensitive to the lack of transparency regarding expenditures for which rate payers will shoulder the burden.

[Chris Petersen @k9eq]

@SDGE Did SDGE pay for this, or will this cost be passed onto ratepayers? Nice they got the AC, but I am curious.

[Chris Petersen @k9eq]

@GraspPutin @Blue_Sauron Good luck hitting it. These things are not flying just above the trees. They’re high up to maximize their area of coverage and to provide a clear path for communications with the controller.

[The Late Show @colbertlateshow]

Dr. Fauci was eligible for his COVID booster shot so Stephen took him next door to the pharmacy to get vaccinated — and they had quite the journey.

#Colbert

[Chris Petersen @k9eq]

@xkcd @NightCapApp Thanks for the pointer! Going to have fun with this app.

[Chris Petersen @k9eq]

@iamtomnash Yes