Astronomy in India — Chapter Summary
CBSE · Class 11 · Knowledge Traditions and Practices of India
Summary of Astronomy in India for CBSE Class 11 Knowledge Traditions and Practices of India. Astronomy is the study of objects seen in the sky. In India.
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Overview
Astronomy is the study of objects seen in the sky. In India, it developed as a strong tradition linked with calendars, daily life, festivals, agriculture, eclipse prediction, and mathematical calculation. Ancient Indian astronomers explained many sky phenomena with remarkable accuracy and built a la
Key Concepts
The Hindu calendar is a luni
The Hindu calendar is a luni-solar calendar. The lunar month helps fix festivals and auspicious days, while the solar month regulates daily life. A so
The moon’s sidereal period with respect
The moon’s sidereal period with respect to stars is 27.3 days, while the period observed from the moving earth is 29.5 days. The lunar month has two h
The Zodiac
The Zodiac, or Rashi Chakra, is an 8-degree-wide belt around the ecliptic and contains 12 zodiacal constellations. There are 27 or 28 Nakshatras. The
A solar month is measured from
A solar month is measured from one Sankranti to the next, that is, from the Sun entering one Rashi to entering the next. The extra lunar month, called
A tithi is a lunar date
A tithi is a lunar date based on the angular separation between the Sun and the moon. A tithi changes when the separation changes by 12 degrees. There
Learning Objectives
- Understand the meaning and scope of astronomy in India
- Recognize the role of the Hindu calendar in daily life and festivals
- Explain key calendar ideas such as nakshatra, rashi, sankranti, and tithi
- Describe the scientific explanation of eclipses and the role of Rahu and Ketu as nodes
- Learn the major contributions of Indian astronomers and mathematicians
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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