Keeping Time with the Skies

What would the sky look like from the surface of the moon during the day?

The time period from one New Moon to the next is slightly longer than 28 days. This is the basis for many:

Which of these describes the moon's size compared to Earth?

Why do the phases of the moon repeat every month?

Why can we sometimes see the Moon during the day?

Which of the following is the correct definition of 'Gibbous'?

What would happen to the Moon's phases if the Moon did not revolve around the Earth?

An observer notes that the Moon is in its 'First Quarter' phase. How many days ago was the New Moon phase approximately?

In which phase is the Moon during a 'Neap Tide'?

Why is the far side of the Moon not actually the 'dark side'?

Which of these objects does not have its own light?

The Moon revolves around the ________.

Why is there no sound on the Moon?

What do we call the moon when it is exactly half-lit from our perspective?

If the Sun is setting in the West and the Moon is directly overhead (at the Zenith), what phase is the Moon in?

The boundary line between the illuminated and dark parts of the Moon is called the:

How much later does the Moon rise each day on average?

The period between a New Moon and a Full Moon is exactly half of a:

How much does the Moon's position shift against the stars per hour?

Which of the following is responsible for the 'Harvest Moon'?

Small pieces of rocks that crash into the moon's surface and create craters are called:

Which of these is NOT a phase of the Moon?

The word 'lunar' is derived from 'Luna', which means:

How many days after New Moon do we see the First Quarter moon?

Which of the following represents the correct order of objects in space from closest to Earth to farthest from Earth?

The gravitational pull of the Moon is the primary cause of which phenomenon on Earth?

In which direction should you look to see a 'Waxing Crescent' Moon shortly after sunset?

Because the Moon's orbit is slightly elliptical, its orbital velocity varies (Kepler's Second Law). How does this affect our view from Earth?

Which of the following describes the Moon's appearance during a 'Total Solar Eclipse' as seen from within the path of totality?

The Tithi in a lunar calendar is calculated based on which factor?

The moon revolves around the ________.

What is the distance of the Sun from the Earth?

Which of these is a gaseous planet?

Ursa Major is visible in which part of the sky?

If a star is $20$ light years away from Earth, how much time does its light take to reach us?

The Sun and all the celestial bodies that revolve around it form the:

Which force is responsible for keeping the planets in their respective orbits around the Sun?

What is the significance of the 'Tropic of Cancer' ($23.5^\circ$ N)?

The Indian calendar system 'Shaka Samvat' is a Luni-Solar calendar. This means it:

If a star rises at 8:00 PM tonight, what time will it rise four minutes from today?

How many major stars form the shape of the 'Big Dipper'?

Which civilization is credited with one of the earliest solar calendars consisting of 365 days?

If Earth did not tilt on its axis, what would happen to the seasons?

What is the Vernal Equinox?

Which movement of the Earth is primarily responsible for the cycle of day and night?

A lunar month is shorter than a solar month. What is the approximate difference in days between a solar year and a lunar year (12 lunar months)?

The 'Autumnal Equinox' typically occurs around:

The 'Heliacal Rising' of a star occurs when:

What is the 'Golden Number' of a year in the context of the Metonic cycle?

The 'Julian Period', used by astronomers to count days continuously since 4713 BCE, is known as:

The time taken by the moon to return to the same position relative to the stars is about 27.3 days. This is called a:

Which of the following is the first month of the Indian National Calendar (Saka Era)?

When the Moon is waxing, it appears to be:

Which celestial body’s movement is the basis for the month in most ancient Indian calendars?

During the second half of the lunar month (Krishna Paksha), the illuminated portion of the Moon visible from Earth begins to decrease. In the provided sequence of lunar progression, what is the name of 'Phase X' that occurs between the Full Moon and the Third Quarter?

An observer notes the moonrise times over several consecutive days. Due to the Moon's orbital motion, it appears to rise slightly later each day. Following the pattern established in the diagram for the first three days, what would be the approximate moonrise time on Day 4?

In the Indian lunar calendar system, different regions use different markers to define the beginning and end of a month. Based on the cycle shown in the diagram, which phase specifically marks the conclusion of a complete lunar month in the 'Amanta' tradition common in Southern and Western India?

In the Indian 'Panchang', which of the following is NOT one of the five limbs (Angas) of timekeeping?

Why does the Moon appear reddish during a total lunar eclipse?

The shadow of the Earth consists of two parts. During a total lunar eclipse, the Moon passes through the:

Which of the following describes the Earth's orbit around the Sun?

The solar calendar helps farmers by predicting:

Does the Sun always rise exactly in the East every day of the year?

Which season starts after the Autumnal Equinox in the Northern Hemisphere?

Which month in the Gregorian calendar was originally the tenth month (as its name suggests) before January and February were added/moved?

The time of day measured by the position of the Sun in the sky is called:

Which latitude marks the southernmost point where the Sun can be seen directly overhead?

The 'Solar Zenith Angle' is the angle between the Sun's rays and the vertical. What is this angle at the Equator during an Equinox at noon?

If Earth's rotation speed doubled but its orbital speed remained the same, how many days would be in a solar year?

What happens to the length of the Sun's shadow at noon as an observer moves from the Equator toward the North Pole on the day of the Vernal Equinox?

Which of the following is true about the Moon's light?

What is the 'synodic month'?

Which month in the Gregorian calendar usually coincides with the start of the Indian month 'Chaitra'?

During which Paksha does the Moon grow in size?

If you observe a 'Waning Gibbous' moon, what phase will occur next?

How many degrees does the Earth move in its orbit around the Sun in one day?

The point where the Moon's orbit crosses the Ecliptic from South to North is called:

If the Moon's sidereal period were exactly 28 days and the Earth did not move around the Sun, how many degrees would the Moon move per day?

Which specific 'Tithi' is observed as 'Maha Shivaratri'?

In the calculation of a 'Yoga', if the sum of the Sun and Moon's longitude is $360^\circ$ or more, what is the procedure?

Which of the following is the 3rd month of the Indian National Calendar?

What was the purpose of the Meghnad Saha committee?

In the Saka calendar, which month has its duration adjusted in leap years?

The official Indian National Calendar is based on a year consisting of how many months?

The Indian National Calendar begins precisely at the Vernal Equinox. At this moment, the Sun's apparent path crosses the celestial equator. What is the astronomical declination of the Sun at this starting point of the calendar?

The Indian National Calendar is designed with a specific structure for its two halves. In a normal (non-leap) year, what is the total number of days in the first six months of the year, starting from Chaitra through Bhadra?

The number of days in Chaitra depends on whether the year is a leap year. If the Gregorian year is 2030 (which is not a leap year), how many days will there be in the month of Chaitra for the corresponding Saka Era year 1952?

A person was born on 29 February 2000. What would be the equivalent date in the Indian National Calendar?

The Saka year 1 Saka corresponds to which Gregorian year?

Which Indian state has a traditional calendar that is very similar in solar structure to the National Calendar but starts in mid-April?

The distance between celestial bodies is often measured in:

Which festival is celebrated to worship the Sun God, especially in Bihar and Uttar Pradesh?

The changing shapes of the bright part of the moon as seen during a month are called:

Which of the following is Earth's only natural satellite?

Many religious and cultural festivals, such as Eid-ul-Fitr, are celebrated only after the first sighting of the crescent moon (known as the 'Hilal'). Given that this moon is in its early waxing phase and follows the Sun's path closely, which cardinal direction is the observer facing in the provided diagram?

Ancient Indians used the 'Gnomon' (a simple vertical stick) to track time. How did it help in determining the Solstices?

Janmashtami, the birth of Lord Krishna, is celebrated on the Ashtami of Krishna Paksha. This means the moon is in which phase?

What determines the 'Amavasya' night, which is considered the start of the brightest period in the lead-up to Diwali?

The 'Sun's declination' changes throughout the year. On which festival date would the Sun be directly over the Equator?

In the 'Panchang', the 'Karana' is half of a Tithi. If there are 30 Tithis in a month, how many Karanas are there in total?

Why do we need satellites for live television broadcasts?

Which of the following is used for inter-continental communication?

The distance of geostationary satellites from the Earth's surface is approximately:

Artificial satellites are also called:

How do satellites help in tracking the movement of tectonic plates?

What do we call the path followed by a satellite around the Earth?

Which of these is the most famous space-based observatory launched by NASA?

What is 'Attitude Control' in a satellite?

Which of these was the first artificial satellite launched into space?

What happens to the orbital speed of a satellite as its orbital radius increases?