This is freaking hilarious. I might buy this book just to read more of this:
“Imagine you’re stranded on the Red Planet with three crewmembers,” Seedhouse, a professor at Daytona Beach’s Embry-Riddle Aeronautical University wrote. “You have plenty of life-support consumables but only sufficient food to last one person until the rescue party arrives. What do you do?.. One day, while brewing coffee for breakfast, you realize there are three chunks of protein-packed meat living right next to you.”
… the biggest of the Mars explorers should sacrifice themselves first because they “both consume and provide the most food.” He went on to provide a “weirdly detailed look” at how to cut up one’s fellow humans if necessary.
“We don’t know where Seedhouse would fall in the buffet line because we couldn’t find his height and weight online,” the authors wrote, “and honestly we’re scared to ask.”
In “Survival and Sacrifice”… readers will also find… a photo of ten astronauts smiling in space alongside the caption: “In the wrong circumstances, a spacecraft is a platform full of hungry people surrounded by temptation. Is it wrong to waste such a neatly packaged meal?”
I used to think this idea was kinda silly and based on flimsy and handwavey justification, but then I saw a colloquium by a famous black hole physicist on it. Now I REALLY think this idea is silly and made up!
Oh! They don’t mean that black holes must come in perfect pairs! The headline makes it sound like it’s about wormholes across vast distances. No! What they’ve found is a stable “orbit” solution for the two-body problem. Normally when you place two bodies anywhere in an empty universe, they will gravitate towards each other until they collide. But in a universe with dark energy, there is some perfect distance between them, where the accelerating expansion perfectly counterbalances the accelerating attraction. They’ve used general relativity math to actually calculate such an arrangement.
The “stable” orbit in this case is the same kind of stable as a pencil balanced on its sharp tip - if it tilts even slightly one way it will fall out of control. Although they tantalize the idea that they might be able to make it truly stable against small perturbations once they finish their spinning black hole solution.
I would like to have known some specific numbers examples! Like if you have as much dark energy as our universe, and two 10-solar-masses stellar black holes, how far apart would that be? Is it like 1Ly or 1MLy? How far for two 10-million-solar masses supermassive black holes? The formulas they created should give the exact answer but I am not skilled enough to substitute the correct numbers for the letters.
Interestingly, the exploration and strategic planning you use in stargazing is a lot like what you need in the B9 Game scanning the skies or game map, locking on to targets, and discovering new challenges. Whether you're navigating constellations or game levels, it's all about observation and timing.
Jasmine’s subtle beauty lies in its ability to arugula plant spacing bloom repeatedly with little fuss. It can handle summer heat gracefully and brings natural softness to rock gardens, pathways, or balconies.
fosstodon.org/ - this scientist reckons 0.2AU to Mars. Still 30m km. And thus about 100x further than the moon. But it only took Armstrong three days to do that distance!
Could we slingshot between the earth and the moon a probe to reach it’s relative solar velocity and chase it down? Does anyone know the bounds of that?
Equipped with functioning instruments and still transmitting data, New Horizons will provide scientists valuable insight into the edge of our local solar system, helping us understand the transition zone between solar and interstellar environments.
astronomy
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