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.
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Thanks for sharing this update — it’s disappointing to hear the Boeing capsule won’t be flying astronauts to the space station on the next mission. Safety has to come first, but delays like this remind us how challenging and complex human spaceflight really is. Just like when considering a Botox Treatment in Acton, careful planning and attention to detail are essential for safe and successful outcomes. It’ll be interesting to see how Boeing addresses the issues and what steps NASA takes to keep the program on track. For personal care enthusiasts, treatments like a Derma roller lip also highlight how precise technique can make a big difference in results, even in completely different fields.
Do you just ignore words when reading? Is everyone on the Internet illiterate? Because comment sections everywhere seem to indicate it’s a very high percentage.
Saturn’s moon Enceladus and many other ice-covered moons orbiting the outer planets are believed to conceal vast subsurface oceans beneath their frozen shells. These hidden seas, trapped between layers of ice and rocky cores, make such moons some of the most promising locations in our solar system to search for extraterrestrial life. A new study published on November 24 in Nature Astronomy offers fresh insights into the internal dynamics of these worlds, helping scientists better understand the processes unfolding beneath their surfaces. The findings also shed light on how the moons’ striking and varied geological features may have formed over time. Official Site
Is thus such a bad thing, as humans explore and spend more time living / working in space, we are going to need a way to get people to / from space, but also supplies, if Boeing can be part of the supply solution.
Sure, they can be a part of the supply solution. But these capsules were originally designed for transport of astronauts, and the supply side has much more competition.
Good point, what was the main issue with the capsule? or was it with the rocket that took this in to space?
There is also perhaps going to be a need to transport items to from facilities in space, if we build a new ISS and also build one orbiting the Moon, then items / people need moving around.
I have often thought we need like they have on Star trek, shuttles or runabouts (DS9).
There’s quite a lot of issues, but the main issue is with the thrusters not firing properly, which could cause astronauts to get stranded in space. It could also prevent getting the heat shield in the proper position for re-entry, both are dangerous, obviously.
A human rated spacecraft is orders of magnitude more complex and expensive than a mere cargo carrier. Developing a human rated capsule and then only using it for cargo would be ridiculously wasteful.
They have quite big plans, but almost 14. Million € on hand. I hope they manage to achieve their goal.
We produce for the first time high-resolution multi-colour movies with the EHT combined with new telescopes probing the variable extremes of the electromagnetic spectrum (e.g. CTA, MeerKAT/SKA1). The data are analysed and interpreted with innovative models finally combining micro- and macrophysics. The PIs bring together complementary expertise over the entire black hole mass scale in radio imaging and multi-wavelength monitoring, astroparticle physics, and theoretical modelling to bear on the problem. This is accompanied by four major investments: construction of a new mm-wave telescope in Africa enabling full dynamical imaging of black holes with the EHT, new model development, supercomputing hardware, and a vibrant team of young scientists to help develop a new, truly universal black hole paradigm.
If it can be infinitely dense inside a black hole, doesn’t that mean the scale doesn’t matter and that the ‘inside’ is pretty much it’s own whole universe with different physics rules?
Mathematically, it’s possible, but scientists are still skeptical about whether or not they are real. They’re called white holes and you can actually create a model of one in your kitchen sink. If you let the water just hit the bottom and spread out evenly in all directions, you can kind of visualize the way it’s supposed to work. Action Lab on YouTube actually has a pretty good video about it which I suggest watching if you’re interested. youtu.be/p3P4iKb24Ng?si=b3_RHuj0J3F_7DC1
phys.org
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