MySci Unit 23: Stars and Constellations

Front

What is a constellation?

Back

A constellation is a cluster of stars in the sky that have been grouped together in a pattern.

Front

How did the ancient Greeks use constellations?

Back

The ancient Greeks used constellations to tell stories.

Front

What two things cause us to have seasons?

Back

Earth's revolution around the Sun and Earth's tilt at 23.5 degrees.

Front

What force keeps the planets in our solar system revolving around the Sun?

Back

Gravity.

Front

How long does it take for Earth to make one revolution around the Sun?

Back

365 1/4 days.

Front

What is the main reason we see different constellations at different times of the year?

Back

The Earth's position in its orbit around the Sun changes the view of the night sky.

Front

What is the name of our galaxy?

Back

The Milky Way.

Front

What is the difference between a star and a planet?

Back

A star is a massive, luminous sphere of plasma, while a planet is a celestial body that orbits a star and does not produce its own light.

Front

What is the significance of the North Star?

Back

The North Star, or Polaris, is significant because it is located nearly directly above the North Pole and is used for navigation.

Front

What are the two main types of stars?

Back

The two main types of stars are main-sequence stars and giant stars.