Definitions for galactic year
ga·lac·tic year

WiktionaryRate this definition:0.0 / 0 votes

1. galactic yearnoun

   the time it takes for the Solar System to orbit around the center of the Milky Way Galaxy, estimated to be from 225 to 250 million years.

2. galactic yearnoun

   by extension, the time it takes a celestial body to complete a quasi-orbit in a galaxy

WikipediaRate this definition:0.0 / 0 votes

1. Galactic year

   The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy. One galactic year is 230 million Earth years. The Solar System is traveling at an average speed of 230 km/s (828,000 km/h) or 143 mi/s (514,000 mph) within its trajectory around the galactic center, a speed at which an object could circumnavigate the Earth's equator in 2 minutes and 54 seconds; that speed corresponds to approximately 1/1300 of the speed of light. The galactic year provides a conveniently usable unit for depicting cosmic and geological time periods together. By contrast, a "billion-year" scale does not allow for useful discrimination between geologic events, and a "million-year" scale requires some rather large numbers.

WikidataRate this definition:0.0 / 0 votes

1. Galactic year

   The galactic year, also known as a cosmic year, is the duration of time required for the Solar System to orbit once around the center of the Milky Way Galaxy. Estimates of the length of one orbit range from 225 to 250 million "terrestrial" years. According to NASA, the Solar System is traveling at an average speed of 828,000 km/h or 514,000 mph, which is about one 1300th of the speed of light. If you could travel at that speed in a jet aircraft along the equator, you would go all the way around the world in approximately 2 minutes and 54 seconds. According to NASA, even at this incredible speed, it still takes the solar system 230 million years to orbit the center of the Milky Way Galaxy one time. The galactic year provides a conveniently usable unit for depicting cosmic and geological time periods together. By contrast, a "billion-year" scale does not allow for useful discrimination between geologic events, and a "million-year" scale requires some rather large numbers.

Editors ContributionRate this definition:0.0 / 0 votes

1. galactic year

   The duration of time it takes the solar system to complete a cycle of a galaxy.

   The galactic year provides a usable unit for showing time periods.

   
   

   Submitted by MaryC on July 21, 2015  

How to pronounce galactic year?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say galactic year in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of galactic year in Chaldean Numerology is: 1

2. Pythagorean Numerology

   The numerical value of galactic year in Pythagorean Numerology is: 6

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Galactic_Year
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Galactic_Year
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=galactic year