How many galaxies/stars do we visually lose every year due to them accelerating and passing through the cosmological event horizon? |
- How many galaxies/stars do we visually lose every year due to them accelerating and passing through the cosmological event horizon?
- when I shine a flashlight at Mars, does a small amount of the light actually reach it?
- How do we know that the universe is expanding and light is not just losing momentum?
- What is happening to the organs of someone who suffers from scoliosis?
- Does the order of operations have an deeper significance, or was it a convention that was simply agreed upon?
- Does defibrillation work differently in people who have undergone the Nuss procedure?
- What is the difference between an aeroplanes 'air speed' and its 'ground speed'?
- What happens when an electron hits a positron when they both have different momentum?
- If Mars and Venus switched places, would Venus be hospitable for life?
- If light is effected by gravity of black holes, does that mean light can orbit a black hole?
- Why are there no stable isotopes of technetium despite it being so much lighter than all the other unstable elements?
- Are insects affected by inbreeding like mammals?
- Does the uncertainty principle just pertain to velocity and position, or are there other "quality pairs" that it stops us from getting perfectly?
- if matter and energy are one and the same, shouldn't earth have been gaining tons and tons of mass over the years via sunlight?
- Can a molecular transition be intrinsically polarized?
- If I am riding in a bus traveling 60 mph, and I throw a ball 30 mph from the front the bus to the back of the bus, what exactly is happening? Is the ball moving, or is the bus accelerating away from the ball at 30 mph?
- Why are all radioactive decays electrons, positrons, or helium nuclei?
- Quick question about thermal expansion?
- If a person were to jump while on top of a car travelling 70mph, would they land on the roof again?
- When talking about quarks and particle physics, what is strangeness and what does it do?
- Did Newton know his theory of gravity was incomplete?
- Would it be accurate to say that a stationary charge produces an electric field, but a moving charge produces a magnetic field?
- How is a root certificate verified?
- Why are there much more consonants than wovels in many modern laguages?
| Posted: 06 Mar 2017 05:19 PM PST I was reading about dark energy on Wikipedia and this question had me pondering on a bit. edit: Hello everyone, I appreciate all the feedback received from this post and I'm grateful for such well presented answers. I realise that this sort of question can raise many different answers due to the question being too general. But as I understand from most of the replies... The reason the light from those stars will never entirely vanish is because even when the star/galaxy passes the cosmological event horizon, the space between us and them is only expanding and so the light that was sent before the star/galaxy passing the cosmological event horizon will only stretch due to the expansion and continue to reach us but through other spectrums of light as it continues to redshift. Would this be correct? I would also like to bring forward a question that has been brought up by a few other redditors. However as it may seem there is no exact answer to it, I'd like to ask a question similar to it: Which stars/galaxies have most noticeably redshifted or faded from visual light? I'd definitely like to read up on this topic so any names or articles would be great. Thanks again guys! [link] [comments]  |
| when I shine a flashlight at Mars, does a small amount of the light actually reach it? Posted: 07 Mar 2017 03:20 AM PST |
| How do we know that the universe is expanding and light is not just losing momentum? Posted: 07 Mar 2017 04:13 AM PST We know that the universe is expanding since light coming from distant galaxies are redshifted. How do we know that the redshift isn't the result of light losing momentum over incredibly long periods of time? (As momentum decreases, wavelength increases (p=h/λ)) Are there any other methods to verify that the universe is expanding other than observing redshifts of light? [link] [comments]  |
| What is happening to the organs of someone who suffers from scoliosis? Posted: 07 Mar 2017 06:33 AM PST Depending on the level and degree of the scoliosis (curvature of the spine) the area inside the person's torso is generally smaller, and therefore leaves less room for organs. I am aware that the body doesn't fully adjust for this, i.e. the fat content on the person body is generally the same as what it would be if the person were their correct height depending on diet and weight of course. [link] [comments]  |
| Posted: 06 Mar 2017 05:50 PM PST |
| Does defibrillation work differently in people who have undergone the Nuss procedure? Posted: 07 Mar 2017 06:25 AM PST The Nuss procedure treats Pectus Excavatum, a.k.a. Hollow Chest, by inserting a stainless steel bar under the sternum in order to push it outwards. [link] [comments]  |
| What is the difference between an aeroplanes 'air speed' and its 'ground speed'? Posted: 07 Mar 2017 05:17 AM PST |
| What happens when an electron hits a positron when they both have different momentum? Posted: 07 Mar 2017 02:17 AM PST I know that after the annihilation when they have the same momentum, or no momentum there are 2 photons emmited in 2 different directions, due to conservation of momentum, but what happens when they hit eachother with different momentums? Will they be emmited at an angle other than 180deg to each other, or will one have higher frequency than the other, or something completely different? [link] [comments]  |
| If Mars and Venus switched places, would Venus be hospitable for life? Posted: 06 Mar 2017 10:17 AM PST |
| If light is effected by gravity of black holes, does that mean light can orbit a black hole? Posted: 07 Mar 2017 07:14 AM PST So if the black hole was exactly the right mass and the light was at exactly the right passing trajectory could it be pulled into an orbit? [link] [comments]  |
| Posted: 07 Mar 2017 04:07 AM PST |
| Are insects affected by inbreeding like mammals? Posted: 06 Mar 2017 01:56 PM PST |
| Posted: 06 Mar 2017 03:52 PM PST |
| Posted: 07 Mar 2017 06:18 AM PST |
| Can a molecular transition be intrinsically polarized? Posted: 06 Mar 2017 03:20 PM PST I am aware of stimulated emission where emitted photons have the same polarization as the incoming photons which induced the emission. To my knowledge, vacuum fluctuations also have no preferred polarization and thus spontaneous emission is also unpolarized. But I was recently told by a colleague that transitions can also be intrinsically polarized and was wondering what exactly that means and how it comes about? Are certain transition only stimulated by right circularly polarized photons? [link] [comments]  |
| Posted: 06 Mar 2017 08:08 PM PST |
| Why are all radioactive decays electrons, positrons, or helium nuclei? Posted: 06 Mar 2017 09:19 PM PST And as a follow up, similar to how beta+ gives a positron, could there be alpha+ that gave a 2-antiprotons, 2-neutron emission? [link] [comments]  |
| Quick question about thermal expansion? Posted: 06 Mar 2017 06:54 PM PST Is cake or bread in an oven rising due to thermal expansion? I feel like it technically is but I'm no science master. [link] [comments]  |
| If a person were to jump while on top of a car travelling 70mph, would they land on the roof again? Posted: 07 Mar 2017 03:57 AM PST My entire Sixth Form is stuck in a debate about whether or not you would have enough momentum to land on the car again or if the car would continue travelling, leaving you behind. None of us take physics so any answers would be greatly appreciated. :) [link] [comments]  |
| When talking about quarks and particle physics, what is strangeness and what does it do? Posted: 06 Mar 2017 08:41 AM PST I can only find tiny amounts of information on quark strangeness and all my physics teachers simply tell me "not to worry about it". [link] [comments]  |
| Did Newton know his theory of gravity was incomplete? Posted: 06 Mar 2017 07:45 AM PST Did Newton realize his theory of gravity was incomplete in that it did not take into account time distortion caused by gravity? If not that specific did he know something was wrong but did not know what? [link] [comments]  |
| Posted: 06 Mar 2017 05:22 PM PST Capacitor (no moving charge) = E- field Current (moving charges) = Mag Field Point charge at rest = E field Point charge moving at speed v = Mag field Is this a 'correct' conclusion? If so, why is this so? [link] [comments]  |
| How is a root certificate verified? Posted: 07 Mar 2017 01:48 AM PST I am confused as to how a root certificate can be verified to be genuine? I found that you have something built into your browser that checks if the root certificate of a certificate chain is correct? But what if some chain just copies the root certificate from a genuine source so that your computer verifies it with that? How can you know it's actually genuine? Also how does your browser actually know it is the root certificate? Does it have a built in public key that it decrypts the certificate with and checks it? [link] [comments]  |
| Why are there much more consonants than wovels in many modern laguages? Posted: 06 Mar 2017 09:59 PM PST |
| You are subscribed to email updates from AskScience: Got Questions? Get Answers.. To stop receiving these emails, you may unsubscribe now. | Email delivery powered by Google |
| Google Inc., 1600 Amphitheatre Parkway, Mountain View, CA 94043, United States | |
No comments:
Post a Comment