How do we measure the length of a year?

The video tutorial explains the concept of orbital speed, particularly focusing on the speed of objects when they are closest to each other, known as perihelion. It discusses how the apparent motion of the sun is fastest at this point, making it easier to measure the length of a year. The tutorial introduces the concept of the anomalistic year, which is slightly longer due to gravitational effects from other celestial bodies. The video concludes with a brief reflection and New Year wishes.

What is the term used to describe the point where an orbiting object is closest to the object it orbits?

• Zenith

• Periapsis

• Apogee

• Nadir

How is the anomalistic year determined?

• By measuring the time between two aphelion passages

• By measuring the time between two solstices

• By measuring the time between two equinoxes

• By measuring the time between two perihelion passages

What is the duration of the anomalistic year?

• 365 days, 5 hours, and 48 minutes

• 365 days, 6 hours, and 14 minutes

• 366 days, 6 hours, and 14 minutes

• 364 days, 6 hours, and 14 minutes

What causes the anomalistic year to be slightly longer than other year measurements?

• The Earth's rotation speed

• The tilt of Earth's axis

• The distance between Earth and the Moon

• Gravitational effects from other celestial bodies

What is the effect of gravitational forces from other celestial bodies on Earth's orbit?

• It causes the orbit to precess

• It has no effect on the orbit

• It causes the orbit to become more circular

• It shortens the anomalistic year