18 Questions
What happens during the June solstice in the Northern Hemisphere?
The North Pole is tilted closest to the Sun.
What is the duration of a Krata Yuga?
1.73 x 106 years
What is the shortest day of the year in a hemisphere's winter solstice?
The shortest day of the year
What is the term for an event happening at or near the time of an equinox?
Equinoctial
What is the time period during which the day and night are of equal length?
Equinox
What is the longest unit of time mentioned in the ancient Indian system of timekeeping?
Kalpa
What was the basis of the month division in late Vedic India?
Divided into two lunar fortnights
When is the Siddhāntic era believed to have begun?
5th century CE
What was Āryabhaṭa I's contribution to astronomy?
All of the above
What was the estimated diameter of the earth according to Āryabhaṭa I?
1,050 yojanas
What was the significance of the Yavanajātaka?
It recorded the zodiac of 12 signs
What was the meaning of the Sanskrit word 'siddhānta'?
Collection of conclusions or treatise
What was the duration of a solar year according to the Yajur Veda?
365 days
What is the number of nakṣatras or lunar mansions mentioned in the text?
27
What is the duration of a 'day of Brahmā' according to Jain texts?
4.32 billion years
During which period did Jain astronomy develop, based on a peculiar model of two sets of 27 nakṣatras?
3rd century BCE to the 1st century CE
What was introduced a few centuries BCE, due to Babylonian and Greek influences?
The seven-day week
How many months are in each ṛtu or season, according to the Yajur Veda?
2 months
Test your knowledge of ancient Indian astronomy and calendars, including the Vedic period's understanding of solar eclipses, lunar years, and nakṣatras. Explore the early historical period's astronomical computations and more.
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