Astronomy Weekly Newsletter - Friday, June 27, 2014

Astronomy newsletter

Top new questions this week: Supermassive black holes at the center of galaxies The fact is, many, if not most large galaxies have a supermassive black hole at their center. My question is why? Is it because when these galaxies were first formed supermassive black holes were … galaxy supermassive-black-hole galaxy-center   asked by Foo Barrigno 5 votes answered by Py-ser 3 votes Origin of the magnetic field of neutron stars It seems a little counter intuitive that neutron stars possess such strong magnetic fields. Its electric charge is presumably zero, so however fast it spins, it shouldn't generate any magnetic field. … neutron-star   asked by ashpool 4 votes answered by Py-ser 3 votes Any cheap (less than 100 euro) telescope for observing Jupiter? The moon is not challenging. I would like to observe the big planets and their rings. planets telescope   asked by wdlang 4 votes answered by Florin Andrei 5 votes Is there a flaw with the newer purposes and correlations attributed to the HR diagram? (And would a third axis of mass correct the enclosed flaw?) When I was younger, I was looking at HR diagrams, and began to experiment with the HR diagram. I was looking at plotting different groups of stars on the HR diagram when I found RV Tauri stars. … star fundamental-astronomy mass   asked by DeathHammer000 3 votes answered by Envite 4 votes Formation of stars How are stars formed? I read somewhere that when dust, gas, rocks etc come close to each other due to gravity, slowly and gradually build up a lot of pressure and form stars. If what I read is … star   asked by Aryaman Bansal 3 votes answered by Joan.bdm 4 votes Dark Energy Expansion The new Cosmos extra features mentions that at about 6,771,500,000 years ago the universe began an accelerated expansion. How do we know this? What evidence do we have for this renewed and accelerated … gravity expansion redshift cosmological-inflation dark-energy   asked by CDspace 3 votes answered by Stan Liou 4 votes Burning Out Stars In the book "A Really Short History Of Nearly Everything", I read that the larger the star is, the faster it burns itself. Whys that? Wouldn't there be more energy to burn if it's larger, and just be … star   asked by Bob the zealot 2 votes answered by Joan.bdm 1 vote Greatest hits from previous weeks: Why don't we feel the speed of earth moving When we move our vehicle, we "feel" the speed of it. However, when stationary, we still are moving,but moving by quiet a speed. We know that earth moves with X speed, our own solar system moves at Y … earth gravity speed   asked by kumar_m_kiran 3 votes answered by Jeremy 7 votes What is the difference between our time and space time? I am trying to understand the phenomenon of space-time. But, everything on internet seems to be too complicated for me since I do not have a background in physics. Can anyone give me simple … gravity light space-time   asked by Asadullah Ali 7 votes answered by Gerald 8 votes Can you answer these? Percent-illumination of crescent moon and its naked-eye visibility? What level of percent-illumination of moon (waxing crescent), given by Stellarium, is enough to make it visible with naked eye, in clear sky? thanks moon   asked by kaka 2 votes Singularity in Laplace Method for Orbit Determination I have a question about Laplace angle-only method for orbit determination where the line of sight vectors are being interpolated. I read somewhere that the method fails (due to a matrix being … orbit   asked by Charles zi Britannia 1 vote Metallicity: What are the metallicity values of various galaxies? What are the various values of metallicity of various known galaxies, like Milky Way, Large Magellanic Cloud, Small Magellanic Cloud, Andromeda and so on? galaxy   asked by MycrofD 1 vote

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