If black holes slowly loss mass over time; is there a point where they stop being black holes and devolve into something more like a neutron star?  Quote A collaboration of researchers including UBC scientists have observed gravitational waves from the collision of what is most likely a neutron star and an object likely to be a light black hole, 650 million light-years from Earth. The mass of the black hole is 2.5 to 4.5 times the mass of Earth’s sun, meaning it falls in the so-called ‘mass gap’: heavier than heaviest known and theorized neutron stars but lighter than the lightest black ..read more

Does anyone have an idea of the most efficient and expedient way to deflect, redirect, or slow an impending asteroid impact? Obviously, if it is a solid block of metal or rock, just hitting it with a large mass going at a fast enough speed, may change its' velocity enough. Here's my idea I haven't heard about yet.  Since asteroids can be a solid block of metal, or rock, or a fragile rubble pile or fluff, or anything in between, catch it with a giant net.  Launch a rocket towards the asteroid, and at the correct moment the rocket turns around and decelerates to zero, then accelerates ..read more

I'm seeking some (any) online information about small monolith asteroids. . . including info about the kind of rocks that form them. Unfortunately Google search hijacks this simple query by substituting it for rubble pile asteroids (even Wikipedia plays this trick). Try it: type "monolith asteroids" (with quotes) into the Google search bar and see what happens. Weird ..read more

I represent the flagman network of popular science YouTube channels Ridddle with 10+ million subscribers who are passionate about science. Our channel: url deleted Our team is launching a new section of interviews with representatives of the scientific community. We would be pleased to invite you as an expert to discuss the subject of your research. In turn, we present a YouTube channel with a 5+ million audience that allows you to share your thoughts, latest research, and written books/essays and find like-minded people and partners. Filming will take place in Miami. We will be grateful for y ..read more

Gravitational effect and pressure of photons in Friedmann equation?   [math] \frac{1}{R}(\frac{{{d^2}R}}{{d{t^2}}}) =  - \frac{{4\pi G}}{3}({\rho _m} + {\rho _r} + {\rho _\Lambda } + \frac{{3({P_m} + {P_r} + {P_\Lambda })}}{{{c^2}}}) [/math] ρ is the unit of mass density. Pressure of matter : P=0 Pressure of radiation : P=(1/3)ρc^2 Regarding the source of pressure, there are the following expressions in major books: Quote   Note that the effect of the pressure P is to slow down the expansion (assuming P>0). If this seems counterintuitive, recall that because the pressu ..read more

Is it known why Titan happens to have at thick atmosphere when none of the other moons in the solar system do? And from the surface of Titan, is there ever a break in the clouds (doesn't look like it) so that Titanians (I know there arent any but maybe one day) can see Saturn and the sunshine from the surafce? Cheerz GIAN ..read more

I thought this article in the Guardian was rather intriguing: https://www.theguardian.com/science/2024/mar/09/controversial-new-theory-of-gravity-rules-out-need-for-dark-matter As I read this, the proposal is that fluctuations in spacetime itself (i.e. not vacuum fluctuations) could give rise to "extra" apparent gravitation which could dominate over conventional gravitation at long range, thereby accounting for the anomalous rotation rates of the edges of galaxies. Link to abstract of the paper here: https://arxiv.org/abs/2402.19459 There was a previous piece on this a few months ago ..read more

On 2/28/2024 at 4:51 PM, Sensei said: ..then who made up the Universe.. ?   What makes you think the universe was "made up" and hasn't always existed? Just because you have a linear existence with a fairly definable beginning and end because of time, doesn't mean the universe must behave in a similar manner. Personally, I have a lot more faith in the laws of conservation of matter and energy than I do in the relevance of time in relation to the universe as a whole ..read more

We could observe the present only if by reducing to the absurd , the speed with which the carrier of the image would have infinite speed up to the receiver and then to processor of the image and the processing of the image would be done at instantaneous speed. My English is bad, maybe I will be a little confused but I will try to explain: We observe in the present but everything we observe comes from a mixture of past tenses, due to the fact that the distances from objects to the light receiver plus the distance from the receiver to the information processor are different , never equal (even i ..read more

If you ask me we should've done this a long time ago but here is a video on a plan to bring back samples from Mars.    ..read more