What is The sun: Definition and 634 Discussions

The Sun is a British tabloid newspaper. As a broadsheet, it was founded in 1964 as a successor to the Daily Herald, and became a tabloid in 1969 after it was purchased by its current owner. It is published by the News Group Newspapers division of News UK, itself a wholly owned subsidiary of Rupert Murdoch's News Corp. Since The Sun on Sunday was launched in February 2012, the paper has been a seven-day operation. The Sun previously had the largest circulation of any daily newspaper in the United Kingdom but it was overtaken by rival Metro in March 2018.In 2012, The Sun on Sunday was launched to replace the closed News of the World, employing some of its former journalists. The average circulation for The Sun on Sunday in September 2019 was 1,052,465.In February 2020, it had an average daily circulation of 1.2 million. The Sun has been involved in many controversies in its history, including its coverage of the 1989 Hillsborough football stadium disaster. Regional editions of the newspaper for Scotland (The Scottish Sun), Northern Ireland (The Sun), and the Republic of Ireland (The Irish Sun) are published in Glasgow, Belfast, and Dublin, respectively. There is currently no separate Welsh edition of The Sun; readers in Wales receive the same edition as the readers in England.

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  1. A

    Distance of a point on the earth from the sun

    A question was posed that I decided to have a crack at, and I want to check my understanding. This isn't homework by the way, just trivia. Also the thread title is not really correct but I didn't want to complicate things! Here's the question: What is the relative difference in the distance...
  2. J

    Why doesn't the earth spiral into the sun?

    Hi all! If space isn't a true vacuum, why doesn't our Earth lose its speed due to friction? I know that it's a near vacuum outside our atmosphere and the friction would be almost negligable. But in the course of a billion years, shouldn't it have an effect? Why aren't we slowing down...
  3. J

    What would happen if a big superfluid cloud eclipses the Sun?

    Imagine a big superfluid cloud the size of the Moon, at the same distance of the Moon in front of the Sun. A total eclipse of 7 minutes. What would happen with the light coming from the sun during these 7 minutes? Would we see a "night sun"? Another question. "Estimates of the photon...
  4. B

    Since the Sun is losing mass, can a planet's orbit change be measured?

    Since the Sun is changing 4M tons of matter into energy every second and that energy eventually makes its way to the surface and is emitted as an outbound sphere of EM radiation, then the planets' orbits would change over time due to the less massive Sun at the solar system's core. It would...
  5. J

    Inside the Sun to Earth's Poles more

    Referring to following video, starting at 3 min. Earth's Magnetic Field deflat the Solar Storm. I would like to know more what is going on between the periods before Solar Storm hits Earth's Magnetic Field and after Solar Storm hits Earth's Magnetic Field? Does anyone know any...
  6. M

    Does the Earth actually revolve around the Sun

    Ok...My idea is a bit ridiculous.But i just wanted to know more about it from you experts. Scientists say that the Earth is revolving around the sun and so also the other planets. Newton and all the other guys who were experimenting and developping physics were observing our external world...
  7. N

    Is Ice Possible Inside the Sun?

    i understand that this may seem like a impossible theory but is it possible that ice could form inside a sun, i understand that the core of a sun is extremely hot but due to the incredible pressures invovled could hydrogen or another gas be compressed so much that it could form ice?
  8. J

    If somehow we could hear the sun, how loud would it be?

    I know its impossible in a vacuum, but what if. Let's say in our lower atmosphere, what would the sun sound like. A really loud and continuous bomb?
  9. mef51

    The Sun, Electromagnetic Waves, and Gravitational Waves

    This is a question about electromagnetic waves and gravitational waves. Let's say we're on the Earth and we're looking up at the sun (safely). If the sun were --for some reason-- to violently and dramatically jerk from its position, how would we first find out? Would we first *see* the...
  10. L

    Circular Motion of the Earth around the sun

    Homework Statement What is the period of Earth's (nearly) circular motion around the Sun? (2*pi*r)/T 1 year (1 year)/(2*pi) (2*pi)/(1 year) 2*pi*(1 year) Homework Equations There is only one speed that a satellite can have if the satellite is to remain in...
  11. C

    Is the sun older than we think?

    Hey everyone. Let me preface this by saying, I love physics and astronomy, but am by no stretch an expert in either subject. I had a question that I thought someone on this site might be able to answer, I have been looking around the internet, but couldn't find one. So, I understand that The...
  12. ElijahRockers

    How long will the sun shine for? (relativistic energy)

    Homework Statement The sun radiates about 4.0E26 J/s. a) How much mass is released as radiation each second? b) If the mass of the sun is 2.0E30 kg, how long can the sun survive if the energy release continues at its present rate? Homework Equations Not sure, but I think I'm...
  13. P

    The Sun, on average, is 93 million miles from Earth. How many meters is this?

    The Sun, on average, is 93 million miles from Earth. How many meters is this? Express using powers of ten. Express your answer using two significant figures. Okay so: Okay so, 1 Meter = 1609.344 x 93 = 149668.992 1.5 x 10^5 (2 significant figures) When I put 1.5x10^5 in, it says 'The...
  14. B

    Is the sun visible if you're standing on the moon?

    My educated guess is that you can see the sun if you were standing on the moon. Having said that, why isn't there any pictures of the sun taken by astronauts who've "supposedly" walked on the moon..? This seems odd to me.
  15. sophiecentaur

    The Sun is very spherical - allegedly

    I read this Scientific American link and I found it very interesting. I have a problem understanding it, though, because I had read that one of the explanations for the existence of Solar Systems is based on Angular Momentum. The argument goes that if all the mass were concentrated in the host...
  16. N

    Calculate the rate of energy output of the sun, taking the sun as a blackbody

    [b]1. The surface temperature of the sun is approximately 5800K. Given that the radius of the sun is 6.96x108m calculate the rate of energy output of the sun, taking the sun as a blackbody. [b]2. H = εσAT4 [b]3. Surface temp = 5800K, Radius of the sun = 6.96x108, Emissivity of a...
  17. R

    Einstein's Theory of Relativity: Why Planets Orbit Quicker Near the Sun

    Einstein predicted a slightly quicker orbit for planets very close to the sun that will deviate from Newton’s gravitational laws very slightly. Later observations, as we know, have proved correct and General Relativity holds up. But what is the perceived reason as to why this is? What is the...
  18. A

    Could there be a portal inside or near the sun?

    Could there be a portal inside or near the sun? Consider the magnetic field and energy of the sun.
  19. C

    What cosmological event could snuff out the sun without destroying Earth?

    I'm considering writing a story in which we Earthlings have a few years to prepare for a cosmological catastrophe in which our planet will lose its energy source and be adrift in space. This would mean the end of life on Earth - but not right away. We could insulate giant underground chambers...
  20. V

    Sun's Temperature: Is the Sun Charged?

    The temperature of the sun is so high that the matter exists in plasma state.At such high temperatures electrons are not bound to the atoms.Does it mean that the sun is charged? If the sun is neutral, where do the electrons reside?
  21. D

    Comet near the sun whose orbit is?

    A comet near the sun whose orbit is________ would never be near the sun again is called what? My options are elliptical (I know its not this one), circular, hyperbolic, apogee, and following an inverse square law.
  22. B

    How big and bright is the Sun seen from 120 AU?

    Hi all Currently, Voyager 1 is about 120 AU from the Sun. I wonder how big (or small) and bright would the Sun be seen from aboard this spacecraft . What approximate magnitude?. Thanks in advance.
  23. fluidistic

    Why Does the Balmer Series Dominate the Solar Spectrum Over the Lyman Series?

    In a assignment problem, I had to calculate the relative number of hydrogen atoms in the fundamental state, first, second and third excited states for a temperature of 5000 K. I used Maxwell-Boltzmann's statistics and I found out that (from memory) the most populated state was the fundamental...
  24. T

    Position of the Sun and Moon in ECEF coordinates

    Hi! I was just wondering if anyone knows where I can find a software/algorithm that can give me the postion of the sun and the moon in ECEF coordinates? If not, do you have any clues to how I might start building one? I am an engeneering student, so I don't have a lot of knowlegde about...
  25. H

    Heliocentrism vs Geocentrism: Is the Earth Really Orbiting the Sun?

    Homework Statement This is a conceptual question. Does the Earth orbit the sun or does the sun orbit the Earth? I know this is silly of me to ask. After all, everyone learns at a young age the the Earth -obviously- orbits the sun. We can represent the Earth orbiting the sun by defining the...
  26. K

    Whats is volume of mass at the centre of the sun

    Thank you
  27. R

    Subtracting the proper motion resulting from movement of the Sun

    Hello, I have been trying to compute the velocity of the star with respect to its local medium from the proper motion measurements. Sure, you can calculate the corresponding velocities by v = 4.74*(proper motion)*distance (in suitable units), but this resulting velocity is now with respect to...
  28. BobG

    How Did the Transit of Venus Shape Modern Astronomy?

    Venus will cross the Sun on June 5-6 of this year. Historically, the transit of Venus holds a significant place in the history of astronomy. As most know, Kepler's third law stated the square of the period of a planet is proportional to the cube of it's mean distance. Newton's Laws of...
  29. spark802

    How do we move around the sun?

    Okay i want to stir something up...do we Earth dwellers move around the sun in a roughly circular path (ellipse) OR are we moving in a straight line in a curved space? Dave
  30. M

    What is the actual colour of the Sun?

    Hello, I've recently been trying to find out what colour the sun is, but I've had no luck. If you take a look at this picture: http://apollo.lsc.vsc.edu/classes/met130/notes/chapter2/plank_e_sun.html You can see that the maximum wavelength is in the green section. If so, shouldn't we see the...
  31. W

    Why Don't Planets Fall into the Sun?

    Why Don't Planets "Fall" into the Sun? Ok, guys, I am new to physics (just studying it on my own before taking it next year in school) and watched a bunch of videos online about general relativity and gravity. I'm sort of stuck, though, with why if general relativity explains gravity as...
  32. P

    The Sun and Hydrogen into Helium Fussion?

    Hi, I'm just after a definitive answer on how Hydrogen fuses into Helium in the Sun? Some places say the Sun is so hot that they overcome their same charge repulsivness and fuse together while other places say that our sun is not hot enough for that to happen and that they just get close...
  33. P

    What is the interesting video I came across showing?

    I recently came across an interesting video. What do you think it might be? http://www.youtube.com/watch?v=Ypqfq0SYrAQ&feature=player_embedded
  34. P

    Is the sun a passive or active blackbody?

    Is the sun a passive or active blackbody? Thanks
  35. K

    What is the minimum angular distance from the Sun for Venus to be visible?

    What is the minimum angular distance from the Sun for Venus to be visible TO THE NAKED EYE?
  36. C

    First magnetic phenomenon observed on the Sun

    I am currently doing a bit of research into the history of our understanding of the solar magnetic field. It is quite interesting. As I understand it, sunspots, which were observed at least as early as the time of Aristotle, were the first solar magnetic phenomenon to be observed. Can...
  37. Z

    How much heat can I get from the sun?

    Hi, I'm a student doing a project that involves building a model house with passive solar heating system. I'm curious if there is a way to approximate the amount of heat I will absorb through a south facing window on a sunny day, in early April. I realize this depends on many variables, but...
  38. O

    Effective angular diameter of the sun for this experiment

    Hi, We are using a radio interferometer to measure the angular diameter of the Sun. An in depth description of how this is done is not relevant to solve the immediate problem I have. But briefly, we rotate the interferometer in azimuth so that the direction it's looking at traverses across...
  39. C

    My random thoughts about the sun, black holes, and gravity.

    I'm a huge noob and I don't know much about physics and space and stuff, but I was thinking about this in the shower today.. Anyone care to comment? Or correct me on anything? Ok, so I was talking about to Daniel about Gravity, the Sun, and Black Holes.. (Yes we are ghetto nerdy xD) And i...
  40. K

    How big will the sun get when the seas begin to boil?

    First of all, I apologize if this is not the right place - it's my first post (although I've lurked for a while), so... er. Doomsday question. I'd like to know how big the sun will get - visually (but please without °, I am not educated enough to understand those) - at the end of its life...
  41. L

    Ionization of hydrogen in the sun

    Homework Statement in part 1 i used the Saha equation to calculate that the hydrogen in the center of the sun was fully ionized (given temperature and central electron density). part 2 says: Re-examine the result by computing the average separation of atoms at the center of the sun knowing...
  42. Y

    Gravitational force between the Earth and the Sun

    Homework Statement The question is what is gravitational force between the Earth and the Sun. We are given the formula F = Gm1m2/d2. I found the mass of the sun and the Earth the gravitational constant and the distance. my issue is the G of the equation. G=6.674 x 10^-11 m^3 / kg s^2 my issue...
  43. A

    Why the sun didn't absorb heavy elements from early solar system?

    Hi, ive been studying formation of solar system and couldn't find an explanation for why the sun didn't absorb heavy elements from early solar system? why they remained around the sun and formed planets and not get absorbed to the centre? thanks in advance
  44. S

    Classical Explenation on How The Sun keeps Shining

    Is Quantum Tunneling necessary to explain why The Sun keeps shining , due to it not being hot enough to provide the necessary energy for protons to collide?
  45. L

    Deflection angle of a comet traveling around the Sun

    Homework Statement A comet is approaching the Sun from a vast distance with velocity V. If the Sun exerted no force on the comet it would continue with uniform velocity V and its distance of closest approach to the Sun would be p. Find the path of the comet and the angle through which it is...
  46. Loren Booda

    The Sun with a planet with a moon with a satellite

    In our Solar System, what is the best example of a planetary moon having its own satellite? What general properties do such satellites share?
  47. S

    The Effects of Dumping Nuclear Waste into the Sun

    okay so I don't want this to be an argument on whether dumping nuclear waste into the sun is feasible or practical or not, as I'm pretty sure it's not rather I'd like to ask a question that my mom asked me once when I was trying to argue the idea to her. She asked me: "well if you dumped so...
  48. D

    Velocity of the Sun Through Stars: Time & Distance to Collision

    Homework Statement The sun moves through the collection of stars in it's neighborhood with velocity v=10 km/s. (A)Assuming n*=1 pc^(-3) and that all starts have the same radius R*, what is the typical time we must wait before the sun collides with another star? Express your answer first in...
  49. L

    Deflection of light passing close to the sun

    I would like to know how much light passing close to the sun will be deflected by the suns magnetic field and the increase in density of space around the suns corona.
  50. B

    Are photons from a light bulb and the sun the same for our bodies?

    Photons activate hormones in us which cause us to wake up. I'm wondering if there is a different between the photons coming from the sun and the photons coming from a light bulb? Do these both have the same effect on the body? I've put this in the classical category because of optics.
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