Understanding Polaris and Latitude

The video tutorial explains how sailors in the 16th and 17th centuries navigated using the North Star, Polaris, to determine their latitude. By measuring the angle of Polaris above the horizon, sailors could ascertain their position north or south. The video details how this method works, its limitations, and provides practical examples using locations in New York. It emphasizes that Polaris is only visible in the northern hemisphere, making it a reliable tool for navigation in those regions.

In the 1700s, sailors used which star to determine their latitude?

• Sirius

• Polaris

• Betelgeuse

• Vega

What instrument might sailors have used to measure the angle of Polaris above the horizon?

• Astrolabe

• Compass

• Barometer

• Telescope

Why is Polaris used to determine latitude?

• It is visible from both hemispheres.

• It changes position frequently.

• It is located directly above the Earth's axis.

• It is the brightest star in the sky.

At the North Pole, Polaris is located at which point in the sky?

• Horizon

• Zenith

• 45 degrees above the horizon

• Directly east

What is the angle of Polaris above the horizon at the Equator?

• 0 degrees

• 45 degrees

• 60 degrees

• 90 degrees

What is the term for the point directly overhead in the sky?

• Horizon

• Meridian

• Nadir

• Zenith

As you travel south from the North Pole, what happens to Polaris' position in the sky?

• It disappears.

• It gets lower.

• It remains the same.

• It gets higher.

In Elmira, New York, what is the approximate angle of Polaris above the horizon?

• 30 degrees

• 50 degrees

• 45 degrees

• 42 degrees

If you are in Syracuse, New York, what would be the angle of Polaris above the horizon?

• 39 degrees

• 46 degrees

• 43 degrees

• 40 degrees

As you travel north in New York, what happens to the altitude of Polaris?

• It remains constant.

• It becomes unpredictable.

• It increases.

• It decreases.