Starship Asterisk*

Boomer12k wrote:How DARK is the NIGHT on Mars???

The night sky on Mars should look just like that on Earth on a moonless night at a remote place (no light pollution). However, I don't know how clear the marsian sky is.

Would it be possable to fly after we leave the milky way?IT seems that space filled with a different kind of matter would pervent our traveling through it.Does space time still come into play after we leave the milky way?IT could be like hitting a brick wall! Moveing through the universe could be i...

Hello, coming back to the "you landed on Mars and opened your eyes" part, the following question arose during lunch with my colleagues: why does it look so bright on Mars? From the picture I get the feeling that it is as bright on Mars as on a normal day on Earth. From Wikipedia I got that...

Yes, I can understand people who complain that they visit an Astronomy Picture of the Day site and don't see a picture that is directly related to a celestial object. On the other hand, I think it is important that once in a while you get something that is not directly related to what you were expec...

neufer wrote:The bright (i.e., large) moon is Titan.

Thank you! But wouldn't an adjective like 'prominent' or 'picturesque' be more appropriate? English is not my native language, and 'bright' is confusing to me in this context, where the moon in question is actually brown/dark in the picture.

Can someone please guide my eye and tell me where the bright moon (Epimetheus?) can be found in the picture? Thanks!

Hello, I did a quick "back of the envelope" calculation for the angular dimension (theta) of Moon and Mars. I used theta=arctan(2R/d), where R is the radius and d is the distance to earth. Using R_Mars=3400 km, d_Mars=205 x10^6km, I got theta=0.002 degrees, whereas the Moon has 0.5 degrees...

Every Black Hole Contains a New Universe Inside Science | Nikodem Poplawski | 2012 May 17 A physicist presents a solution to present-day cosmic mysteries. The headlines of the article reads: "Every Black Hole Contains a New Universe" The article's first sentence reads: "Our universe ...

i'm asking if that is the case, then how could particle & anti particle annihilation take place ..they are saying 100% of antimatter created during BB was annihilated with matter and left over is just 1% of matter This is the million dollar (Nobel) prize question! what do you say to the opinion...

i actually thought like you people ...but if you take a moment to read this stuff on CERN website http://public.web.cern.ch/public/en/Research/CPViolation-en.html you might doubt your own understanding.These are people carrying out experiments like LHC and stuff so that give some credence to what t...

we know that matter and anti matter particles were created in equal quantities in bigbang. We don't know, but it is the most plausible assumptions. The "matter/anti-matter creation" during the "big bang" is poorly understood, because we don't have a theory that can describe such...

I was following the cartoon up until he said that the question about the Higgs field translates into a search for the Higgs particle. What does this mean? If everything with mass is interacting with the Higgs field at all times, and the existence of the field implies the existence of the particle, ...

It made me wonder what sort of night views a planet might have when there are only tens of thousands of local stars instead of the millions that we're used to. This gives an artistic answer to the inverse of your question: what might be the night view of a planet inside a star cluster. If one were ...

Does antimatter really mater! After all; what are the chances that any of us will come in contact with it? :? Chances are far from zero: In medicine, there exists Positron-Electron-Tomography . The patient is injected with a radioactive substance that emits positrons. These then annihilate with the...

We do know that antimatter does not have "anti-gravity". Not really Here are my reasons why matter and anti-matter do have the same mass (I specialize to the electron and its anti-particle, the positron). In a magnetic field, electrons and positrons move on circles with the same radius, b...

Do you know if anybody is doing any research in this area? I think this is modern science's answer and must be incorect. I agree it is more likely that I misunderstand some physical law than I see the universe more corectly than everyone els. But isn't red shift just a chromatic aboration on an int...

Time to go back to school to figure out how an isolated electron generates its magnetic field. I haven't a clue why electrons generate an electric field. An electron has an electric charge and spin. Both are intrinsic fundamental properties. The electric charge is the source of its electric field. ...

Oh, What do you make of this then[...]? Thank you for the article! Just to be clear: the article (Phys. Lett. B. vol. 699 p. 224-229) is about the rotation axes of spiral galaxies, not about galaxies rotating around a common center (let alone other universes). So, there is still no center around wh...

We observed that everything revolving around a central point in the universe. We have observed redshifts, which, together with the general theory of relativity, lead us to conclude that the universe is expanding. We have not observed that "everything revolves around a central point". So, ...

Dear Smita, the universe is not expanding into anything. While the expansion is often described by an inflating balloon in popular science books, this analogy fails when one asks your question. On cosmological scales the distance between two objects, galaxy clusters say, is indeed increasing with ti...

Dear babaonet, Friedmann and others were searching for solutions to Einstein's new theory of gravitation (general relativity). Since the equations are quite complicated, Friedmann made the simplifying assumption that the universe is homogenous and isotropic. These are technical terms, which translat...

The "Inflation" descriptions/theory that I have read only address the 3 spatial Ds, but Einstein et al says that Time is intimatly linked into the 4D fabric. The key is the astronomical observation, known as the Copernican principle, that the universe "looks and is the same everywher...

In terms of defining units of measurement, there would seem to be a good argument for using one of the emission lines of hydrogen (the most basic element) for a unit of frequency/time Replace hydrogen with cesium and you have the SI definition of a second, which is defined as the 9 192 631 770th mu...

Time comes to a stop; ergo: frozen as in no internal (as well as external) motion. The first part of your statement is only valid for an observer far away from the Black Hole's horizon (as you emphasized yourself earlier). An observer falling freely could very well pass through the horizon without ...

Dear Case24, here are the rough numbers. They are by no means precise, but just orders of magnitude. diameter earth = 12,700 km diameter sun = 1.4 10^6 km So, the diameter would be about 5 m. Imagine your marble and a house. diameter sun = 1.4 10^6 km diameter solar system (taken to be that of Pluto...