Definitions for sidereal year
side·re·al year

Princeton's WordNetRate this definition:2.0 / 1 vote

1. sidereal yearnoun

   the time for the earth to make one complete revolution around the sun, relative to the fixed stars

WiktionaryRate this definition:0.0 / 0 votes

1. sidereal yearnoun

   The orbital period of the Earth; a measure of the time it takes for the Sun to return to the same position with respect to the stars of the celestial sphere. A sidereal year is about 20.4 minutes longer than the tropical year due to precession of the equinoxes.

WikipediaRate this definition:0.0 / 0 votes

1. Sidereal year

   A sidereal year (, US also ; from Latin sidus 'asterism, star'), also called a sidereal orbital period, is the time that Earth or another planetary body takes to orbit the Sun once with respect to the fixed stars. Hence, for Earth, it is also the time taken for the Sun to return to the same position relative to Earth with respect to the fixed stars after apparently travelling once around the ecliptic. It equals 365.256 363 004 ephemeris days for the J2000.0 epoch. The sidereal year differs from the solar year, "the period of time required for the ecliptic longitude of the Sun to increase 360 degrees", due to the precession of the equinoxes. The sidereal year is 20 min 24.5 s longer than the mean tropical year at J2000.0 (365.242 190 402 ephemeris days).At present, the rate of axial precession corresponds to a period of 25,772 years, so sidereal year is longer than tropical year by 1,224.5 seconds (20 min 24.5 s, ~365.24219*86400/25772). Before the discovery of the precession of the equinoxes by Hipparchus in the Hellenistic period, the difference between sidereal and tropical year was unknown. For naked-eye observation, the shift of the constellations relative to the equinoxes only becomes apparent over centuries or "ages", and pre-modern calendars such as Hesiod's Works and Days would give the times of the year for sowing, harvest, and so on by reference to the first visibility of stars, effectively using the sidereal year. The Indian national calendar, based on the works of Maga Brahmins, as are the calendars of neighbouring countries, is traditionally reckoned by the Sun's entry into the sign of Aries and is also supposed to align with the spring equinox and have relevance to the harvesting and planting season and thus the tropical year. However, as the entry into the constellation occurs 25 days later, according to the astronomical calculation of the sidereal year, this date marks the South and Southeast Asian solar New Year in other countries and cultures.

ChatGPTRate this definition:0.0 / 0 votes

1. sidereal year

   A sidereal year is the time it takes for the Earth to orbit the Sun once with respect to the fixed stars. It is approximately 365.25636 solar days, which is slightly longer than the tropical year (the basis for the modern calendar year) due to the precession of the equinoxes.

WikidataRate this definition:0.0 / 0 votes

1. Sidereal year

   A sidereal year is the time taken by the Earth to orbit the Sun once with respect to the fixed stars. Hence it is also the time taken for the Sun to return to the same position with respect to the fixed stars after apparently travelling once around the ecliptic. This differs from the solar or tropical year which has length equal to the time interval between vernal equinoxes in successive years. It was equal to 365.256363004 SI days at noon 1 January 2000. This is 6 hours and 9.1626 minutes longer than the standard calendar year of 365 SI days, and 20m24.5128s longer than the mean tropical year at J2000.0. The word "sidereal" is derived from the Latin sidus meaning "star".

The Nuttall EncyclopediaRate this definition:0.0 / 0 votes

1. Sidereal Year

   the period during which the earth makes a revolution in its orbit with respect to the stars.

Matched Categories

1. • Sidereal Time
   • Year

How to pronounce sidereal 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 sidereal year in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of sidereal year in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of sidereal year in Pythagorean Numerology is: 5

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=sidereal year
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Sidereal_Year
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Sidereal_Year
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=sidereal year
6. ^ The Nuttall Encyclopedia
   https://www.gutenberg.org/cache/epub/12342/pg12342-images.html#SiderealYear