pác-séc

Definition
  1. Noun (Astronomy):
    • Parsec: A unit of astronomical distance, defined as the distance at which one astronomical unit subtends an angle of one arcsecond. It is approximately equal to 3.26 light-years or about 30.9 trillion kilometers.
Usage Examples
  • Noun:
    • Ngôi sao đó cách chúng ta khoảng 1.3 pác-séc. (That star is approximately 1.3 parsecs away from us.)
    • Pác-séc là một đơn vị đo khoảng cách phổ biến trong thiên văn học. (The parsec is a common unit for measuring distance in astronomy.)
Advanced Usage
  • The term is often used in professional and scientific contexts to describe interstellar and galactic distances, more conveniently than using light-years for certain calculations.
Variants and Related Words
  • Năm ánh sáng (n): Light-year; another unit of astronomical distance.
    • Một pác-séc tương đương với 3.26 năm ánh sáng. (One parsec is equivalent to 3.26 light-years.)
Synonyms
  • Parsec: The direct English equivalent and translation.
  • Astronomical unit of distance: A descriptive synonym.
Related Terms
  • Đơn vị thiên văn (AU) (n): Astronomical Unit; the average distance from Earth to the Sun, used as a baseline for the parsec measurement.
  • Arcsecond (n): A unit of angular measurement equal to 1/3600 of a degree, central to the parsec's definition.