David Levy

To ACG52 The knowledge is available at Wikipedia It's up to us to except or reject it. If it is stated at Wikipedia: "olderstars have lower metallicities than younger stars". While you claim: It does not mean that as a given star ages, it loses metallicity... Then, sorry, I have no intention to argue about it... If you have a solid proof that your statement is correct than please forward this update to Wikipedia...

You miss the point!!! "The metallicity of an astronomical object may provide an indication of its age". For more information please see Wikipedia - http://en.wikipedia.org/wiki/Metallicity. Supernova is a star expulsive. There is no impact on star Metallicity. For more info please see Wikipedia - http://en.wikipedia.org/wiki/Supernova With regards to your reply: No. Your founding premises are faulty. Stars orbit thegalactic center. Yes, sure, Stars orbit the galactic center. Never the less, we must verify if the stars are moving outwards on inwards after each orbit cycle... For example, the moon orbits the Earth. Never the less,based on NASA verification it moves few centimeters outwards every year. Mars might be another good example for a star is a disc shape system as it orbits the sun; By Wikipedia:"Landforms visible onMars strongly suggest that liquid water has at least at times existed on theplanet's surface". Hence,in order to enable liquid water, it must have been in a similar zone location as the earth today. Therefore,in the past it was closer to the sun. So, it surly moved outwards. Conclusion– We might assume that in a disc shape system, the stars are moving outwards!!! The Milky way is a disc shape system... Never the less, the metallicity gives a solid proof by itself that the stars are moving outwards from the galactic center!!!

Further your question: 1. Wikipedia: "older stars have lower metallicities than younger stars" Therefore: Metallicity decreases as the stars get olders. 2. Wikipedia: "Across the MilkyWay, metallicity is higher in the galactic centre and decreases as one moves outwards". Therefore: There are older stars as one move outwards from the galactic center of the Milky way galaxy. Hence: do you agree with the following statment? In an active galaxy - Milky way, The stars are moving outwards from the galactic center!!! This statment has a huge impact on our understanding of the starting point - Big bang. More info will be follow!!!

Based on Wikipedia: 1. Star birth at the center of the galaxy: "The region where the Scutum–Centaurus Arm arm connects tothe bar of the galaxy is rich in star-forming regions" "The current hypothesisis that the bar structure acts as a type of stellar nursery,fueling star birthat their centers". 2. Older stars as move outwards from the center: "The metallicity of anastronomical object may provide an indication of its age… older stars havelower metallicities than younger stars such as our Sun". "Across the MilkyWay, metallicity is higher in the galactic centre anddecreases as one moves outwards". "Population I or metal-rich stars are thoseyoung stars whose metallicity is highest. The Earth's Sun is an example of a metal-richstar. These are common in the spiralarms of the Milky Waygalaxy". 3. Very Old stars at the dwarf galaxies arround the Milky way: "Ursa dwarf ellipticalgalaxy: By Wikipedia "The galaxy consists mainly of older stars and there appears to be little to noongoing star formation in the Ursa Minor Dwarf galaxy" "Antlia Dwarf: ByWikipedia "The galaxy contains stars of all ages but is dominated by oldstars with the age of more than 10 billion year". Question? If the stars are getting older as move outwards from the galaxy center, does it mean that the stars are moving outwards?