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Answer:

A light year is the distance which is equal to 9,460,730,472,580.8 km, so:  

= 4.91957985 X [tex]10^{15}[/tex]km  

which is distance travels by the light.  Now what time it takes light to travel distance we found.  

A year has 365.25 days, so,

[tex]1 (\frac{365.25)}{1 year}) (\frac{24}{1 day}) (\frac{3600 s}{1 hr} )[/tex] = 31557600 seg/year

The light speed in the space is equal to 299,792.458 km/s, so:  

4.91957985 x [tex]10^{15} (\frac{1 seg}{29792.458}) \frac{1 year}{31557600}[/tex] = 520 years

if today, August, 2020, then

2020 - 520 = 1500

Spanish and Portuguese spread out over the southern part of the Western Hemisphere and bring in America brought to Spanish colony of Santo Domingo in year 1500.

  • Therefore, during the  period
  • 1499 AD Columbus discovered Jamaica
  • A light-year is a distance traveled by light in space during a period of one year from a celestial object to another celestial object.
  • The distance between stars and Earth is 520 light-years. So, the light leaving the star is 520 years ago.
  • The present year is 2019. Light from the star left 520 years ago. The time period on Earth is,

[tex]t=2019-520\\ t=1499 AD[/tex]

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