Astronomy Magazine

Olbers Paradox

Posted on the 14 May 2011 by Gabe12logan
Why is the sky black at night? If the Sun was on two times farther away than it is, then we would receive a quarter of the quantity of photons that we now receive, and also the Sun occupied a quarter of the angular surface of which they now occupy. All this suggests that the intensity of the radiation is constant. In the case of infinitely many stars, the sky area would be filled by the stars, so that the sky would shone as the sun during the day.
Olbers Paradox
Olbers paradox is the paradox of dark night sky, which is in 1826th formulated by Hienrich Olbers (1758-1840). Olbers assumed that the universe is unchanging, static and uniformly filled with stars, whose number increases with distance. Therefore,there must be a star wherever we look and the sky would have to be glittering, but the night sky is still dark. However, the universe is neither immutable nor static, nor uniformly filled with stars, but stars are grouped in galaxies between which there is a huge empty space. The paradox is resolved when, besides the above, we detected expansion of the universe and the redshift, amount of light received already reduced by the square of the distance, and because of the removal of objects that radiate and removal of their redshift, emitted light lost even more energy and becomes visible in the microwave region, so the night sky is dark, not bright.

You Might Also Like :

Back to Featured Articles on Logo Paperblog

These articles might interest you :

  • Shilo Sanders- Son Of Deion Sanders Thanks Courts For Allowing Him To Live With...

    Shilo Sanders- Deion Sanders Thanks Courts Allowing Live With Pilar

    ChristianNews Shilo Sanders, the son of NFL Hall of Famer,  Deion Sanders took to twitter to “thank” the courts for allowing him to live with his mother, Pilar... Read more

    The 04 August 2017 by   Firstladyb
    SPIRITUALITY
  • “I Feel Great”

    Feel Great”

    Jakub went to his doctor's office believing that he had a back injury, but returned with a chocking diagnosis instead. He had type 2 diabetes - in spite of... Read more

    The 04 August 2017 by   Dietdoctor
    DIET & WEIGHT
  • July Allotment Recap (2/2)

    July Allotment Recap (2/2)

    Sunday afternoon saw us return bravely to 24a even though there were more thundery showers foretold by the weatherman. I will admit that I guffawed at the... Read more

    The 04 August 2017 by   Chrryblossomtat2
    GARDENING, HOME
  • Culinary Delicacies in Croatia- What to Eat and Drink in Croatia

    Culinary Delicacies Croatia- What Drink Croatia

    In my earlier post, we spoke about how Croatia is a stunning European destination, let us now see what are the culinary delicacies in Croatia or what you can... Read more

    The 04 August 2017 by   Kash Pals
    FOOD & DRINK, A-CLASSER
  • #Golf Training Aids Spotlight: The Delta Putt

    #Golf Training Aids Spotlight: Delta Putt

    Do you consider yourself to be a strong putter or do you feel you could improve your make percentage on the green? Most amateurs could use help with the flat... Read more

    The 04 August 2017 by   Golfforbeginners
    GOLF, SPORTS
  • Three Incredible Hikes in Southern Iceland3 Min Read

    Three Incredible Hikes Southern Iceland3 Read

    Nature takes center stage in Iceland, where there's a stunning view around every bend: massive glaciers, expansive lava fields, powerful waterfalls, black sand... Read more

    The 04 August 2017 by   Healthytravelblog
    TRAVEL
  • What I Wore: Daytime Pajamas

    What Wore: Daytime Pajamas

    Pajama top: ELOQUII (14) | Pajama pants: ELOQUII (14) | Shoes: ASOS (similar) | Earrings: J. Crew ( same in different colors, similar concept in same color) |... Read more

    The 04 August 2017 by   Wardrobeoxygen
    FASHION, SELF EXPRESSION, SHOPPING

Paperblog Hot Topics

Magazines