These piggy-backing telescopes would of course have to be relatively inexpensive, disposable and replaceable as the Starlink orbitals (I am told,) only have a three year operational lifetime before they break up on re-entry.
On an aside, was musing on the aspect individual use, allowing...
Elon Musk's Starlink orbital internet communication system is presently seen as a detriment for observing the cosmos by ground observers, but have astronomers thought asking Elon Musk if he would consider mounting compact low-energy telescopes on the back of his orbitals, facing away from Earth...
So how should one think of of a universe where every inch of it is something rather than nothing?
Are falling balls magically maintained by a Universe that does not consist of absolute vacuum? Where there is always inertia - no matter how small - working on the two balls falling towards a...
Galileo, Newton and Einstein were working with incomplete data, and it is truly amazing what they accomplished in spite of that.
When it came to two different weight masses, they all proceeded - as done today - on the assumption that these masses fell at the same fall-rate towards the Earth...
Now the ball and feather, given enough time to be observed, will not fall at the same rate anywhere in the Universe. Masses of different weight falling at the same speed towards a strong gravitational field is a useful rule-of-the-thumb approximation, but as a law it is incorrect.
Confirmed to generate work? Then the 2020 paper must be no big deal.
And if all space, including hard vacuum in the Universe follows suit, then the notion that balls and feathers fall at the same rate can be observed not to be true. Given sufficient time of travel for observation, the greater...
So my question is, if there is no such thing as a true vacuum in space, doesn't space interfere with the motion of two bodies of of different mass attracted to a powerful gravitational force, observationally measurable if allowed given the limitations of time and distance?
What I am...
My question is rather basic, and does not necessarily pertain to any particular property, be it virtual particles, vacuum foam or background radiation passing through a given quantity of space. What I want to know: Do absolute vacuums exist?
The pulling of plates together in the Casimir Experiment. Is that not an example of work performed? Would the experiment be any different if performed in intergalactic space?
Doesn't that suggest the a hard vacuum is something rather than nothing?
That, if it is something, it would set...
OK, let's forget virtual particles (I don't believe I mentioned them.)
Doesn't every cubic centimeter of deep intergalactic space have at the very least, background radiation passing through it?
If one was to perform the Casimir experiment in this sparse volume, would it not echo the same...
It is not a localized Casimir Effect that is important; it is that, according to quantum mechanics, all space - no matter how hard a vacuum is - it is not empty. So no matter how inconsequential it may seem to some, all objects falling towards a strong gravitational field do so depending on...
Quantum mechanics has argued for years that space is not a vacuum.
Arguments attempting to brush aside quantum mechanics vacuum theory claiming, it's 'just a quantum mathematical theory' can now put to rest.
In this article, laboratory experimentation demonstrates that the Casimir Effect can...
Just seems myopic, ignoring the elephant in the room, a 15 million C solar core, that no one has as yet discovered a venting solution for heat dissipation.
Divorcing the Corona from the Photosphere and the core makes a mockery of the Coronal heating problem - the 2nd law of Thermodynamics - hot...
Isn't really important? A whopping great solar core furnace?
The magnitude temperatures such as these are hard for me to grasp, so I created this model to help me understand the problem:
Let’s pretend we can drop the temperature of the Photosphere to 0 Degrees Celsius so this shell is the...
Thanks for the reply and links.
Isn't it a little like taking note of the heat coming from a stove in a winter cabin, musing as to why the stove is cool, the room is warm - and ignoring the interior heat of the stove?
In previous manifestations explaining the Coronal Heating Problem, scientists pointed out the discontinuity between a very hot Solar interior, the 'cool' Photosphere and a Hot Corona.
According to the newly modified entry in Wikipedia, they now explain the discontinuity only between a cool...
Hi all, I've been wondering:
Thinking of Arthur Eddington's relativistic oriented 1919 eclipse observation, would the photon deviation due to the Sun's gravitational imposition have caused the photons to exhibit a qualitative redshift due to the time photons had spent within the Sun's...
I was thinking more along the line of the Third Law of thermodynamics
I feel small and humbled.
I was not arguing, just asking a question from a rich forum of knowledge.
I used the Wikipedia quote for brevity. There is a long history of Proton Decay experiments out there, as can be...
Can't the electron decay into a photon and neutrino?
Over time, with the electrons having decayed into photons and neutrinos, dissipating at the speed of light and contributing to the Heat Death of the Universe, leaving only the slower moving Protons in existence, would the like polarity...
My body contains Electrons as well as Protons. If my body consisted merely of Protons, since they are of the same polarity, wouldn't they repel one another?
The electron can decay into a photon and neutrino, the dispersion contributing to the Heat Death of the Universe, but if the Proton doesn't...
If a Proton did decay, wouldn't it result in an emission of radiation, a release into the entropic system described in the Third Law of Thermodynamics, contributing to the Heat Death Universe, whereas a non-decaying Proton would not?
Since radiation travels at the speed of light and Protons do not, and if Protons do not decay, would that infer that an expanding Heat Death Universe would consist of a core of relatively slow proton outflow while the radiation of the Universe has left the Protons behind?
Dear admins and moderators,
I am sure this subject has come up many times before, and could well be a stupid question. If so, could you direct me to the relevant thread(s)?
Setting aside its itinerant electron, (Hydrogen Atom,) the Proton is THE building block of the Universe.
"...Despite...
Looked it up, yes indeed; proto-stars can form in a mere 50 million years according to present theory. I don't know what time span is necessary for second generation stars to form. How about Quasars?
A few years ago I became intrigued by articles reporting the discovery of stars very close to the purported Big Bang; 400 million years seems an awful short time for a star to evolve. Then more recently the discovery of 2nd generation - hydrogen, carbon stars - in the same proximity, supposedly...
A friend sent me this paper:
"Electrical Phenomena on the Moon and Mars ", which was submitted at the ESA Annual Meeting on Electrostatics 2010, states:
"...Measurements during the Apollo missions, together with more recent data from orbital spacecraft , indicate that there are active and...
I gather the majority of mare basalts appear to have erupted between about 3 and 3.5 Ga. I was wondering if the overlay of more recent, smaller impacts (say over the past 200 million years) have created a strong imposition 'shadow' akin to what we see in the illustration of flashes from 2005-2018?
Based on your reply to the image of the original post, can one then infer that the frequency of impacts over millions of years follow this pattern, and does this appear to be reflected in the actual data of the lunar impacts record?
Bandersnatch, thank you; that makes sense.
Can one assume that this has been the case over the hundreds of millions of years and that therefore there are way more crater impacts to be found on either side than in the middle due to Earth shielding? Is this observably so?
I was reading in Sky and Telescope about the Lunar flash during the eclipse last week, and looking at the impact map (2005-2018) I was wondering why there is a 'gap' with no impacts down the middle. It seems rather unlikely that there would be no 'hits' here. Is this an artifact of the limb and...
OK, let's approach this from another angle. If magnetic breaking is so effective in slowing down star rotation, and considering the immense age that we can attribute to stars, how come the Kepler Space Telescope has not observed a single star that has ground to a complete halt?
By chance, this article appeared a few days ago and may be of interest on this topic:
"...Jupiter is the oldest planet of the solar system, and its solid core formed well before the solar nebula gas dissipated, consistent with the core accretion model for giant planet formation..."
Being...
Well, compared to the Sun? Depending who you ask, they formed pretty much at the same time. Sun=28 days, Jupiter=10 hours.
...And to scale, Jupiter has a hell of a lot more magnetic braking going on, no?
Magnetic braking is a theory explains the loss of stellar angular momentum and is used extensively to describe the given rotation stars.
However, on a smaller and more directly observable level, when we consider Jupiter's rapid rotation rate of less than ten hours and its accompanying powerful...
A slight segue here. An absolute vacuum? Really? Really? Do you mean a partial vacuum? Absolute vacuums are the realm of theoretical physics. Example: Present definition of a vacuum is "http://www.thefreedictionary.com/vacuum" [Broken]" Since mass/energy, space and time all seem to be...
Addressing "Wobble"
Of course there willl be vibration in a Space Elevator cable. You can't have a long taught cable without it trying to behave like a guitar string.
Might I suggest dampeners at either end?
As soon as an oscillation starts to build, a 'de-oscillation' computer program...
Finding an immediate economic reason would be nice and I'm sure that there are SE proponents who might expand on that, but as unpopular as my comment might be, the foremost priority is tactical. If it is not an international effort, some nation state - US, China, Japan, will make the move...