Flashcards on Ancient Indian Astronomy

Flashcards covering key concepts and details from the lecture on Ancient Indian Astronomy.

The study of celestial objects through observation is known as __.

Astronomy

The earliest texts on astronomy in Ancient India are known as __.

Vedanga Jyotisha

Each lunar nakshatra represents a __ part of the ecliptic.

1/27

One complete revolution of the moon around the Earth takes approximately __ days.

27.33

The ecliptic is divided into __ equal parts called zodiac signs.

12

The __ is a traditional Hindu calendar used to determine important dates.

Panchang

The lunar month averages __ days.

29.530

An extra month added to align lunar and solar years is called __.

Adhikamas

__ states that the sun takes 365.256364 civil days to complete one revolution around the Earth.

Time in Indian Astronomy

The ancient Indian astronomers acknowledged the influence of __ on astrology.

Greek

In ancient Indian astronomy, the term __ refers to celestial bodies that change position over time.

Planets

The four Yugas in ancient Indian astronomy include __, Tretayuga, Dvaparyuga, and Kaliyuga.

Kretayuga

The diameter of the earth is approximately __ yojana according to Surya Siddhanta.

1600

The __ month is added every three years to correct the difference between lunar and solar calendars.

Adhikamas

The twelve zodiac signs collectively form the __ in astronomy.

Zodiac signs

The __ is one of the earliest known systems of time measurement in ancient Indian astronomy.

Yuga system

The causes of eclipses were scientifically explained by __ in ancient Indian texts.

Varahamihira

Aryabhata calculated the value of π to be approximately __.

3.1416

The __ of the moon is determined by its orbit around the Earth and the Sun.

Position

Aryabhata's work included methods for determining the position of __.

Planets

The sun moves approximately __ degrees in one day.

1

The concept of __ refers to the system of time division in ancient Indian astronomy based on celestial motions.

Kshyatithi

Brahmagupta's main work was the __.

Brahmasphutasiddhanta

The average revolution time of the moon is __ days.

27.32

In ancient texts, the causes of lunar and solar eclipses involve the __ and the sun.

Moon

The lunar month has a duration of __ days.

29.530

The __ is defined as the time it takes for the moon to reach the same angle as the sun again after a new moon.

Lunar month

The ancient Indian astronomer who composed Aryabhatiyam is __.

Aryabhata

The ancient Indian system established the duration of Kaliyuga to be __ years.

432,000

The total duration of a Mahayuga is __ years.

4,320,000

The earth's rotation causes the phenomenon of __ and setting of celestial bodies.

Rising

Panchang includes five components which are Tithi, Nakshatra, __, Yoga, and Karana.

Vaara

The diameter of the moon is approximately __ of the Earth's diameter according to ancient calculations.

0.3

According to Aryabhata, the period of sidereal rotation of the earth is __.

23h 26m 4s.

The element in Vedic astronomy indicating the position of celestial objects is __.

Nakshatra

According to Varahamihira, eclipses are not influenced by __ or other omens.

Portents

Each nakshatra is divided into __ parts in lunar calculations.

27

The sun and moon align at a specific point during which phase of the moon? __ .

New moon

The ancient text that discusses the names of zodiac signs is the __ Jaatakam.

Brihat

The term __ refers to celestial bodies like the sun, moon, and planets in Indian astronomy.

Graha

The average distance that Mars travels in a Mahayuga according to ancient calculations is __ km.

22,96,824

The Vedic system required the division of the zodiac into __ for astrological purposes.

12 signs

The lunar eclipse occurs when the moon enters the __ of the Earth.

Shadow

Varahamihira mentioned that the Greeks are called __ in ancient Indian texts.

Mlechchas

One revolution of the sun around Earth-according to Indian astronomy- takes __ days.

365.256364

The main purpose of the Panchang is to determine the dates of important __.

Religious festivals

The various units of time introduced by Aryabhata include kalpa, manvantara, and __ .

Yuga

The method of measuring celestial distances in ancient astronomy involved the use of __.

Parallax

The text __ discusses the different types of Siddhantas in ancient Indian astronomy.

Panchasiddhantika

The __ system explains the relationship of celestial bodies and their revolutions over large timescales in ancient Indian astronomy.

Yuga system

Aryabhata proposed a method to represent large numbers using __.

Alphabets

Mathematicians in ancient India contributed extensively to the field of __.

Astronomy

The __ divides the celestial sphere for observational purposes in ancient Indian astronomy.

Equator

The value of __ is not to be determined based on omens according to ancient texts.

Eclipses

The __ describes how the sun moves through the zodiac signs over a year.

Ecliptic

The diameters of celestial bodies were estimated using __ as the method of computation.

Geometry

The concept of __ refers to the unique motion and positioning of the moon relative to other celestial bodies.

Planetary Motion