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Monster gravitational waves spotted for first time

nature.com

31–40 of 221 posts

Re: Monster gravitational waves spotted for first time

#31
What do these waves look like as they pass through us? Acoustic-like compression and expansion of particles as molecules temporarily reorient toward a “down” that is ever-so-slightly off from the Center of mass of the Earth?

Also, I assume that these waves are very gentle sinusoids? Could the opposite — a high-amplitude gravitational square wave — be possible? What would it do to the things it passes through?

Re: Monster gravitational waves spotted for first time

#32
post #31

What do these waves look like as they pass through us? Acoustic-like compression and expansion of particles as molecules temporarily reorient toward a “down” that is ever-so-slightly off from the Center of mass of the Earth? Also, I assume that these waves are very gentle sinusoids? Could the opposite — a high-amplitude gravitational square wave — be possible? What would it do to the things it passes through?

It's not so much that you see a slightly different "down," but that space itself is changing such that the distance between e.g. your head and feet is (very) slightly altered.

Re: Monster gravitational waves spotted for first time

#33
post #4

Earlier quoted context omitted.

Theoretically it's impossible to travel through space at or more than speed of light. But space itself can move faster than light speed, and a warp drive would help something similar that you mentioned. That is possible theoretically. But the amount of energy or mass it needs is very high and no current technology (or in foreseeable future) can achieve it. So FTL remains a dream. My hunch based on nothing is that we…

It's fun to imagine the species in x-hundred years. My college physics professor once told us that in 500 years, physics professors will still teach Maxwell's equations in the format he was showing us. And honestly, I think he's right. Somethings we will do the same way for hundreds of years, like the wheelbarrow will still exist in 500 years as it has for likely the previous 5,000. Otoh, I doubt we will be going fas…

Naw in another 500 they'll be antigravbarrows

Re: Monster gravitational waves spotted for first time

#34
post #31

What do these waves look like as they pass through us? Acoustic-like compression and expansion of particles as molecules temporarily reorient toward a “down” that is ever-so-slightly off from the Center of mass of the Earth? Also, I assume that these waves are very gentle sinusoids? Could the opposite — a high-amplitude gravitational square wave — be possible? What would it do to the things it passes through?

I think “look” is a misnomer here. It wouldn’t really look like anything, as it’s fundamentally all of space-time that is being stretched and rippled.

There’s nothing to really see as such.

Re: Monster gravitational waves spotted for first time

#35
post #4

Earlier quoted context omitted.

Theoretically it's impossible to travel through space at or more than speed of light. But space itself can move faster than light speed, and a warp drive would help something similar that you mentioned. That is possible theoretically. But the amount of energy or mass it needs is very high and no current technology (or in foreseeable future) can achieve it. So FTL remains a dream. My hunch based on nothing is that we…

'space' isnt a substance that can move at any speed. What's meant by the claim that 'space moves faster than light' is that extremely distant objects are moving away from each other, relative to each other, 'faster than light' -- which is permitted, so long as that distance can never be bridged by light. The claim amounts to, in other words, that the universe is so large that we can compare objects at distances great…

So it can't fold on itself and form a wormhole that bridges light?

Re: Monster gravitational waves spotted for first time

#37

Earlier quoted context omitted.

> Whereas the original discovery spotted waves originating from the collision and merger of two star-sized black holes, the most likely source of the latest finding is the combined signal from many pairs of much larger black holes — millions or even billions of times the mass of the Sun — slowly orbiting each other in the hearts of distant galaxies. These waves are thousands of times stronger and longer than those fo…

>with wavelengths of up to tens of light years. from a layman's perspective, this sounds crazy cool that they were able to "see" this in the data. seems like one of those things that would be easy to miss from being scoped in and only discoverable after zooming back out. waaaaay out.

We're using what we can measure/see of distant stars for these measurements, so it is indeed zoomed way out.

Re: Monster gravitational waves spotted for first time

#39
post #4

Earlier quoted context omitted.

Theoretically it's impossible to travel through space at or more than speed of light. But space itself can move faster than light speed, and a warp drive would help something similar that you mentioned. That is possible theoretically. But the amount of energy or mass it needs is very high and no current technology (or in foreseeable future) can achieve it. So FTL remains a dream. My hunch based on nothing is that we…

It's fun to imagine the species in x-hundred years. My college physics professor once told us that in 500 years, physics professors will still teach Maxwell's equations in the format he was showing us. And honestly, I think he's right. Somethings we will do the same way for hundreds of years, like the wheelbarrow will still exist in 500 years as it has for likely the previous 5,000. Otoh, I doubt we will be going fas…

We still teach the Newton laws that are comparably old. We also teach that they are approximate, but work flawlessly for household-scale speeds and masses.

Re: Monster gravitational waves spotted for first time

#40
post #32
post #31

What do these waves look like as they pass through us? Acoustic-like compression and expansion of particles as molecules temporarily reorient toward a “down” that is ever-so-slightly off from the Center of mass of the Earth? Also, I assume that these waves are very gentle sinusoids? Could the opposite — a high-amplitude gravitational square wave — be possible? What would it do to the things it passes through?

It's not so much that you see a slightly different "down," but that space itself is changing such that the distance between e.g. your head and feet is (very) slightly altered.

The two descriptions are equivalent. By the equivalence principle, the wave looks locally like neighboring bodies see different directions of down (and also slightly different strengths of the force of gravity in that direction).
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