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Sidereal Meaning: Definition, Examples, and Translations

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sidereal

[saษชหˆdษชษ™riษ™l ]

Definition

Context #1 | Adjective

astronomy term

Sidereal refers to anything pertaining to the stars or constellations. In astronomy, it is often used in the context of sidereal time, which is based on the Earth's rotation relative to the stars rather than the sun. This concept is crucial for astronomers as it allows for precise measurements of celestial objectsโ€™ positions. Sidereal days are approximately 23 hours, 56 minutes, and 4 seconds long, slightly shorter than the solar day.

Synonyms

astral, stellar.

Examples of usage

  • The sidereal day is shorter than a solar day.
  • Astronomers use sidereal time for precise observation.
  • The sidereal year is based on the Earth's orbit around the Sun relative to the stars.

Translations

To see the translation, please select a language from the options available.

Interesting Facts

Astronomy

  • Sidereal time is the time taken for the Earth to rotate once on its axis relative to the stars, which is about 23 hours, 56 minutes, and 4 seconds.
  • Astronomers use sidereal calendars to predict the positions of stars and constellations in the night sky.
  • This type of time measurement is crucial for telescopes, ensuring they point accurately to celestial objects.

Cultural Significance

  • In Hindu astrology, a 'sidereal zodiac' is used based on the positions of stars, differing from the tropical zodiac that is widely accepted in Western astrology.
  • The concept of sidereal time has influenced various calendars, including those traditionally used by indigenous cultures around the world.
  • Many ancient civilizations, including the Egyptians and Mayans, based their rituals and agricultural practices on the movements of stars, highlighting their importance.

Literature and Philosophy

  • The term appears in various literary works, often symbolizing the vastness of the universe and human curiosity about life beyond Earth.
  • Philosophers have discussed the meaning of sidereal existence, pondering the significance of our place in the cosmos.
  • In poetry, elements of the sidereal realm often evoke feelings of wonder and mystery, reflecting on humanityโ€™s connection to the universe.

Origin of 'sidereal'

Main points about word origin

  • The term comes from the Latin word 'sidereus,' meaning 'of the stars.'
  • It was first used in the English language in the 14th century, reflecting humanity's early fascination with celestial bodies.
  • The root 'sider-' is linked to 'sideral' which is tied to influences from both Latin and Greek astronomy.

The term 'sidereal' originates from the Latin word 'sideralis', meaning 'of the stars'. The root 'sidus', which translates to 'star', is also the source of related words in various languages. The etymological development traces back to ancient astronomers who focused on the observation of stars for navigation and timekeeping. Throughout history, various cultures have placed significant importance on the stars, using them to create calendars and guide exploration. The concept of sidereal time is central to modern astronomical practices, reinforcing the connection between time measurement and celestial movement.

Word Frequency Rank

Positioned at #24,227, this word is part of extensive vocabulary. It's relatively rare in general usage but may be important in specific fields or formal writing.