It’s full of stars.

No matter where you look, if there isn't a galaxy behind it, you are not looking far enough …

There should be pictures on here but as someone said yesterday, Opera is broken
again.

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10 thoughts on “It’s full of stars.

  1. Originally posted by Weatherlawyer:

    http://www.jpl.nasa.gov/news/news.php?release=2012-294&cid=release_2012-294

    Here, you have it..In the big image at left, the many galaxies of a massive cluster called MACS J1149+2223 dominate the scene. Gravitational lensing by the giant cluster brightened the light from the newfound galaxy, known as MACS 1149-JD, some 15 times. At upper right, a partial zoom-in shows MACS 1149-JD in more detail, and a deeper zoom appears to the lower right.. Image credit: NASA/ESA/STScI/JHU

  2. Originally posted by Weatherlawyer:

    Why is the sky black when it is so full of light?

    Full of light? Definitely not…

    For if it was bright, stars would be really hard to see.

    That's mine. Now, the scientists..

    if the Universe is full of stars, why doesn't the light from all of them add up to make the whole sky bright
    all the time?

    It turns out that if the Universe was infinitely large
    and infinitely old, then we would expect the night sky to be bright from the light of all those stars. Every direction you looked in space you would be looking at a star. Yet we know from experience that space is black! This paradox is known as Olbers' Paradox.

    It is a paradox because of the apparent contradiction between our expectation that the night sky be bright and our experience that it is black.

    Many different explanations have been put forward to resolve Olbers' Paradox. The best solution at present is that the Universe is not infinitely old; it is somewhere around 15 billion years old. That means we can only see objects as far away as the distance light can travel in 15 billion years. The light from stars farther away than that has not yet had time to reach us and so can't contribute to
    making the sky bright.

    Another reason that the sky may not be bright with the visible light of all the stars is because when a source of light is moving away from you, the wavelength of that light is made longer (which for light means more red.) This means that the light from stars that are moving away from us will become shifted towards red, and may shift so far that it is no longer visible at all. (Note: You hear the same effect when an ambulance passes you, and the pitch of the siren gets lower as
    the ambulance travels away from you; this effect is called the Doppler Effect)."

    NASA Goddard Space Flight Center | Why is Space Black?

    ~ Text quoted above: http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question52.html

    ~ Also see.. http://search.nasa.gov/search/centersearch.jsp?centername=goddard&nasaInclude=why+the+space+is+blackhttp://www.gsfc.nasa.gov/scienceques2002/20030328.htm

  3. Originally posted by tdjmd1:

    Here, you have it.

    There's a lot of it about.Newton posed the question (hardly the first one to do so, I'm sure) Why is the sky black when it is so full of light?He then Herschel had no idea what was out there, the same question applies though.Originally posted by arxiv.org/pdf/1112.3635:

    His method relies on two fundamental assumptions: 1. Stars are distributed more or less uniformly within the Milky Way system and are not found beyond the boundaries of that system. 2. The telescope used for the star-­‐gages is capable of resolving all stars within the Milky Way system. Note that some textbooks claim that Herschel’s star-­‐gage method is based on the assumption that all stars have the same luminosity as the Sun. Herschel described his star gage method in 1784.3 In 1785 he published his results:4 stargagues of 683 regions in the sky, forming a circle running through the galactic poles and crossing the plane of the Milky Way at right angles near the star Sirius (Alpha Canis Majoris) and again near the star Altair (Alpha Aquilae).The star counts were made with Herschel’s “large” 20 foot Newtonian reflector with a focal length of 20 feet and an aperture of 19 inches.

  4. Originally posted by Weatherlawyer:

    An occasional moon?

    Moonlight varies.. It's true, but that makes some sense, doesn't it? All of that 'increase – decrease' thing has a sense certainly.. Those natural cycles depending of it, they are sustaining life over the globe.

  5. Originally posted by Weatherlawyer:

    I wonder what the lesser light was or is.

    As far as I know, yes, it is the moon.It rules time periods and weather spells.. as Lunar calendar, and thus, festivities (human beings) and cycles (nature on whole).

  6. Originally posted by tdjmd1:

    NASA Goddard Space Flight Center; Why is Space Black?

    God made two great lights; the greater governs the day, the lesser governs the night. He also made the stars.http://bible.cc/genesis/1-16.htmI wonder what the lesser light was or is.An occasional moon?Always more questions than answers.

  7. Originally posted by tdjmd1:

    Moonlight varies.. It's true, but that makes some sense, doesn't it?

    The moon is in the sky during the day as often as it is at night.It doesn't actually point out that the sky is dark at night for any particular reason either, but it does make you think.With less deduction necessary to unravel this other thing, than Herschel had to apply to the size and shape of the galaxy, the bible DOES say that the stars are like the grains of sand on the sea shore, which is what the picture also shows.In one place (I have no idea where) it states so and so will be as numerous as the sand etc., etc.. Then in another place, the so and so will be just like the stars in the heavens.Pushing it, I know but…Well.. So?

  8. quote from a BBC programme called The Planets:"An handful of sand contains one million grains.One thousand handfulls make a billion.There are one hundred billion individual stars within our galaxy.and there are at least 50 billion galaxies in our universe.There are more stars in the universe than there are grains of sand on every beach on earth."And at ten times as many planets, we are wrong about 500,000,000,000 planets.

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