Observed Gamma Ray Bursts Occur 1 Per Day. So What About The Unobservable Ones?
926648
I am researching my answer to your question and realize we do not know very much about it, from saying there is only 1 burst per 65 days in 2002 to a lot more as we learn . You probably know more so lets hear your theories instead.What I found so far........\n\n------\nGamma-ray bursts are the most luminous explosions in the Universe, and their origin and mechanism are the focus of intense research and debate. More than three decades after their discovery, and after pioneering breakthroughs from space and ground experiments, their study is entering a new phase with the recently launched Swift satellite. The interplay between these observations and theoretical models of the prompt gamma-ray burst and its afterglow is reviewed.\n----------\nThere will be a conference to discuss this and abstracts are being featured in that conference.\n33rd annual European Physical Society Conference, Rome, 2006.\n---------\nAs for black holes, we are also still learning. Here are some links.\nhttp://chandra.harvard.edu\n\nAND\n\nhttp://chandra.nasa.gov\n\nIMAGE CAPTION:\n[http://chandra.harvard.edu/photo/cycle1/0167/index.html\nor\nhttp://www1.msfc.nasa.gov/NEWSROOM/news/photos/2001/photos01-171.htm]
352876
No, you might be thinking of gamma rays.  Several things can be done using gamma ray coincidence, but only one alpha particle is emitted in alpha decay.
92547
This is a very difficult question. We don't really know how many stars currently exist, so let's rephrase the question to "how many stars in the night sky visible to the naked eye still exist?" (An easier question would be "does star xyz still exist?") If all of these stars are classified into groups whose average lifespans are known, and if the current ages of these stars can be estimated, then using the estimated time that light takes to travel from a particular star to Earth, we can determine if the star has already gone supernova, or if it has darkened. Since most stars visible to the naked eye are relatively young (as compared with super-distant stars visible through huge telescopes), it is likely that a significant proportion of them do still exist. But, again, the question is extremely difficult, but makes for some good thinking.
506147
They do occur during the day.  The huge quake that hit San Franciso in 1989 happened around 5pm.
831436
I have never seen a ufo, but every once in a while there is a small bluish purple dot in the sky that looks like a purple pink-blueish star, it flashes and is really odd. I looked at maps and everything, there are no little radio crappy shows, or anything. in fact it's a big field in nowhere, it's scary. I'm too chicken to drive out there and see what it is. It's creppy where I live.
830892
There are literally hundreds of earthquakes every day.  Thankfully most are small.\n\nSome faults are well documented and a loose prediction that they will slip sometime in the near to middle future can be made but with very little accuracy.
373609
i'm not sure at all(I don't think anybody is), but i think that there might have been other big bangs. Maybe the universes are linked by black holes?
39468
exactly 27.3 days (i did an astronomy unit in science this year)\nbut if you just want to see it each night, it'll be every 27-28 days:)
441328
(m)\n\nFrom earliest times, humankind has noticed flurries of meteors that seemed to emanate from particular points in the sky at particular times of the year. These flurries, now called meteor showers, are produced by small fragments of cosmic debris entering the earth's atmosphere at extremely high speed. When the number of meteors is large, it is called a meteor storm. Each time a periodic comet swings by the Sun, it produces large amounts of small particles which will eventually spread out along the entire orbit of the comet to form a meteoroid "stream". If the Earth's orbit and the comet's orbit intersect at some point, then the Earth will pass through this stream for a few days at roughly the same time each year, producing a meteor shower. The parent bodies (comets) of most known meteor showers have now been identified.\n\nMost meteors seen in meteor showers are caused by particles smaller than a grain of sand. As a result it is very rare to have any meteorites hit the ground during a typical meteor shower.\n\nBecause meteor shower particles are all traveling in parallel paths, and at the same velocity, they will all appear to radiate from a single point in the sky to an observer below. This radiant point is caused by the effect of perspective, similar to railroad tracks converging at a single vanishing point on the horizon when viewed from the middle of the tracks.\n\nAny other solar system body with a reasonably transparent atmosphere can also have meteor showers. For instance, Mars is known to have meteor showers, although these will be different than the ones seen on Earth because the different orbits of Mars and Earth will intersect with orbits of comets in different ways. On March 7, 2004, the panoramic camera on Mars Exploration Rover Spirit recorded a streak which is now believed to have been caused by a meteor from a Martian meteor shower associated with comet 114P/Wiseman-Skiff. A strong display from this shower is expected on December 20, 2007, although it is unlikely that Spirit or Opportunity will still be operational at that time to observe it.
784805
Yes, a few times over its history and they were very interesting.  There was the time when they received pulses a few "hundred times a second."   That's right pulses a few hundred times a second, this could only be from a civilization.  What in nature, especially astronomy pulsed so strong, that fast that it could reach another star system?  Well, they're called Pulsars.\n\nThe first pulsar was discovered by chance by Jocelyn Bell and Anthony Hewish in 1967 who were actually studying distant galaxies at the time. Jocelyn Bell noticed small pulses of radiation when their telescope was looking at a particular position in the sky and for a short time scientists thought they might be coming from an extra-terrestrial civilisation. In fact the source of these pulses were initially referred to as LGM1, Little Green Man 1. Once established that the signals were not of this origin (and also not caused by people on Earth), the unidentified object they were coming from was called a "pulsar" because the emission was pulsed.\nhttp://outreach.atnf.csiro.au/education/everyone/pulsars/\n\nThen there are Quasars and other exotics systems that have surprised scientists with their signals, only later to be discovered natural.
861786
Call newschannel 3, I bet they would look into it.  Royal Norman may even already have an answer.  I have not seen them, though I live very close to you.  I'll have to keep my eye on the SE sky.  Do they occur at a certain time, or various times?  Are they low to the horizon?
114392
Check out college websites. Astros is the solar system. Hence astronate. (cosmos is the universe Russians are cosmonaunts).\nOne research is into the cosmic ray bursts. Where they come from and what is the mechanism they are created. If Earth ever gets a direct hit, that side would be cooked. \nNeutron stars are a combination of these pulsing signals from space and the fact some come from old Nova sites. Hence the physics suggests a very dense, spinning remnant of a star.
671170
Are you including the stars that are being created, as well as those that do not actually exist anymore but have died out/ supernova'd/ etc. that we are just still seeing since the light has to travel so far?  \n\nI would be interested in how you determined this number ^_^
1055957
This is such a great question, I don't think they do exist though. They're probably just an amalgam of a hundred random faces you see in a day.
650511
None, they up in the Sky, best seen at night. The Earth does revolve around a Big Star that can actually be seen in the day and not night. Make for a good Word Play/Riddle question. ;-D
793887
Anyplace not cloudy and that does not have too many bright lights will do. Just look anywhere in the sky. The meteors can appear anywhere in the sky. Look after midnight though, because the radiant won't rise until then. The later at night you look, the better. 4:00 AM would be the best time to look.\n\nThe predictions are not that good this year. A few years ago I saw 50 bright ones per hour. This year they are predicting 10 or 15 per hour, and maybe not bright ones either. Also, the peak time is before the radiant rises in the US, so Europe will see the best show. If the predictions are correct.
142066
keep your open - they may appear one day