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Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 month ago

Is 1 light year equal to 1 year on earth?

The Orion Nebula is 1,344 light years away. Does that mean when I look at it through a telescope I’m looking at it from 1,344 years ago?

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  • D g
    Lv 7
    1 month ago

    1 year is time for earth to revolve around the sun 

    A light year is a distance not a time 

  • 1 month ago

    A light year is a measurement of distance not time. It is measured as the distance that light travels in 1 earth year. or 5,878,625,373,183.60773085 miles  or about 5.8 trillion miles.

  • ?
    Lv 7
    1 month ago

    Yes, and the funny thing is that our Milky Way Galaxy makes one Revolution around its Axis every 250 Million Years or so

    The last time we were at this point

    Dinosaurs roamed Earth

    Even more startling is that many Billions of Light Years we are finding objects from way back near the supposed beginning of the Universe and maybe time itself

    Though the pictures are not exactly Live but Billions of years in the past

    Take Quazars for instance, Quazi Stellar Objects

    they are incredably bright and Massive showing what is possibly a Supergiant Black Hole at the centre

     A mystery to most, but I say they are the forerunners of modern Galaxies

    Attachment image
    Source(s): Check out TON 618
  • ?
    Lv 6
    1 month ago

    one lightyear = distance traveled over 365 days

    light reaching your peepers left the nebula 1,344 years ago

  • Rita
    Lv 6
    1 month ago

    For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km).

  • garry
    Lv 6
    1 month ago

    no its like comparing time against a distance . 2 different things .

  • 1 month ago

    'Light years' are a measure of distance. 

    One light year is the distance light travels in one Earth Year. 

    So agreed 1,344 year is a long time ago.  A photon of light left the Orion Nebula 1,344 years ago to reach your eye today. 

     Light travels at 186,000 miles per second. So in one year it will travel  60x 60 x 365  x 186,000 = 2.444 x10^11 miles. 

    So in 1344 year it has travelled 

    2.444 x 10^11 x 1344 = 3.284 x 10^14 miles.  In 'zeroes' 428,400,000,000,000.0 miles in word 'four hundred and twenty trillion miles'.

    These numbers are so horrendously large that distance is reduced to 'light years'.  

  • Anonymous
    1 month ago

    Orion Nebula is not even there anymore.

  • 1 month ago

    Yes, that's correct.

  • 1 month ago

    1 light year is the distance that light travels in one year.

    So yes, when you see an object that is 1,344 light years away, that means that the light from it that you are seeing is 1,344 years old.

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