# General Astronomy

- Celestial objects, space, and the physical universe as a whole. Astrophotography and amateur astronomy are welcome!
 Views: 8,724 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views Pinned: Astronomy events schedule ( 1 2 3 ... Last) Hi everyone Use this topic for posts about ongoing/upcoming stargazing events (e.g., comets, eclipses,... Mar6-14 05:02 AM PhysicoRaj 281 102,644 Pinned: A&C reference library ( 1 2 3 ... Last) Use this topic to post links to helpful/informative websites about astronomy & cosmology. Apr10-13 11:08 AM marcus 139 87,168 Pinned: Astrophotography photos ( 1 2 3 ... Last) Looking for advice? Willing to share your expertise with other PF members? Brave enough to share & discuss your... Dec12-13 08:47 PM Astronomus 499 144,787 Hellfire requested that I post a list of classic papers that one could use for reference when trying to understand the... Nov28-12 01:12 AM stargazer3 17 37,758 Pinned: Planning to buy a first telescope? ( 1 2 3 ... Last) We often have questions about what telescope an aspiring amateur astronomer should buy. The "correct" answer can be... Nov25-13 11:37 AM Fermifaq 229 78,155 It is thought that the universe is roughly 14 billion years old (soon) and that all matter came from a singularity... Feb28-13 06:24 PM bahamagreen 26 4,452 SpaceTiger's Note: Taken from Please shoot this, somebody (Laura Mersini-Houghton paper) Sorry, this question is... Sep7-06 03:43 AM Chronos 12 2,543 ok il say this now im curious what would happen if you were able to bend the accretion disk and the ergosphere so that... Nov13-10 08:25 AM tiny-tim 1 1,326 The temperature of the sun is so high that the matter exists in plasma state.At such high temperatures electrons are... Jul30-12 03:20 AM Drakkith 24 3,916 Can anyone tell me that how many dimensions are there in a black hole and which are the dimension Nov22-11 02:24 AM vinayjain 55 7,260 Hi everyone, I have seen this reference http://en.wikipedia.org/wiki/Ultimate_fate_of_the_universe and I have... Jan22-12 08:53 PM vinayjain 30 5,367 It might be stupid to think this way but it came to my mind and I wasn't able to find anything related to this on... Jan11-12 09:30 PM vinayjain 6 2,447 How big can these stars get, Also can a star be born at a Supergiant level? I'm having a hard time understanding a... Jul11-05 03:45 PM Chronos 4 1,393 Not sure what section this would belong in but; How far from a possibility are they? Jul23-05 07:17 AM George Jones 13 1,841 IS it possible for this one? I was given an older Meade telescope today the specs: StarQuest Model: 60AZ-M... Feb11-06 12:31 AM turbo 22 2,979 Can someone explain the Omega pointe to me? In regards to the theory of the universe collapsing? Sep18-05 05:22 AM Gerinski 6 1,145 According to the Raisin pudding theory all raisins (galaxies) are to be receding from one another, so why is it that... Sep8-05 01:46 AM SpaceTiger 20 2,891 Can someone explain the equation g/cm^3 in layman's term? I was reading up on this article on Saturn's moon Enceladus,... Sep2-05 01:57 AM matt.o 2 1,415 At which rate do Stars burn there fuel, I know there are different stars (giants,dwarfs etc...) For instance i... Nov7-05 05:34 PM turbo 26 4,121 What would be the effects of Earth not having a moon? I know that our moon is slowly drifting away. But what would... Sep15-05 09:17 AM marcus 13 1,606 strang activity surrounds dying star Sep14-05 11:04 AM vincentm 0 1,132 I read about this somewhere (can't remember) where it stated that the rate of starbirth has decreased as opposed to... Sep24-05 10:19 AM Phobos 8 5,566 http://www.space.com/scienceastronomy/050920_andromeda_stars.html Sep21-05 08:52 PM turbo 11 1,451 Dark Matter: what is it ( 1 2 3 ... Last) Can someone explain to me what is it or what is theorized to be dark matter. What effects does it have in regards to... Oct29-05 11:28 AM Mike2 76 7,889 I'm reading up on star formation and from what i've understood so far, is that protogalactic clouds with density... Oct15-05 07:19 AM SpaceTiger 4 1,417 Does it? :confused: Nov1-05 12:42 PM vincentm 5 1,772 http://www.billingsgazette.com/index.php?display=rednews/2005/11/03/build/nation/96-nasa.inc Nov3-05 05:10 PM Garth 1 1,273 Is it Antares? That is a huge star. Also how does it get to be so big and how long till it goes supernova or is it... Nov5-05 01:37 AM Chronos 3 4,432 According to General Relativity the stars and planets cause a warp in the fabric of space time, right? Now, if... Nov18-05 04:05 PM vincentm 3 961 Hello everyone, :biggrin: Ok astronomers currently know that Andromeda is gonna collide with the Milky Way, i... Mar11-06 11:17 PM vincentm 2 1,345 Keeton, C. R., and A. O. Petters. Formalism for testing theories of gravity using lensing by compact objects. III.... Sep11-06 03:41 AM star.torturer 7 1,089 http://www.space.com/scienceastronomy/060208_hypergiant_stars.html Feb9-06 02:25 PM vincentm 0 1,379 Hello Everyone, I currently own a small dobsonian telescope and with recent trips out to E. Washington state, i've... Sep16-06 02:01 AM Chronos 19 3,109 "We present a comprehensive analysis of constraints on the sterile neutrino as a dark matter candidate. The minimal... May12-06 11:55 AM vincentm 0 1,780 :confused: source: NewScientist Aug11-06 09:30 AM yenchin 10 1,511 Can someone recommend me some good spots, i frequent Eastern Washington, outside of the Tri-cities area, i was... Aug8-06 10:35 AM vincentm 0 5,271 I have the chance to purchase a 6in parabolic mirror with a silvering kit for $50.00 right now, is this a good deal? ... Mar26-08 04:08 PM vincentm 0 1,283 Hello, I'm looking to build my first telescope from this one. Using the mirror, etc. Basically i want to put it in... Jul11-08 01:52 PM chemisttree 2 1,552 Hello, I just purchased a 6" mirror that has a focal ratio of 3.3, ready to go for$50. Is there any links one can... Sep21-08 12:13 AM Chronos 18 2,889 Is there any kits i can purchase? I'd like to avoid diffraction as much as possible. Oct16-08 11:09 PM Chronos 9 4,126 So one of my friends from my Astronomy club has given me a 6in mirror blank at our club mtg last week. I'd like to try... Nov23-09 11:15 PM Chronos 2 2,094 hey there, idunno if this has been discussed before. there were a lot of articles abt a minor change in the tilt of... Jan25-05 01:00 PM vinee 2 2,996 I choose this site because it displays the pictures, but the article is hitting all the news sites: ... Jan24-12 02:09 AM lpetrich 9 3,319 Hi! I have two (stupid) questions: 1) We can determine what elements are present in distant stars by studying... Dec7-11 10:17 PM Chronos 9 2,707 What happened before the Big Bang? Was there just matter about or was there a big bang before the big bang? May13-03 11:01 AM heusdens 34 4,096