Stars and Galaxies: Characteristics of Stars

The video explores how people have historically identified constellations in the night sky, such as Ursa Major and Orion. It explains the composition of stars, which are made of gases and plasma, and how their energy reaches Earth. Stars are classified by size and color, with white dwarfs being small and giant stars being large. The color of a star indicates its temperature, with red being cooler and blue being hotter. Star brightness is influenced by size and temperature. The video provides a basic understanding of these astronomical concepts.

Which constellation is known to resemble a bear?

• Andromeda

• Orion

• Ursa Major

• Cassiopeia

What is the primary composition of stars?

• Metallic elements

• Liquid water

• Solid rock

• Gases and plasma

How far does sunlight travel to reach Earth?

• 150 million kilometers

• 50 million kilometers

• 300 million kilometers

• 1 million kilometers

What color are the hottest stars?

• Yellow

• White

• Blue

• Red

What factors determine a star's brightness?

• Speed and direction

• Color and shape

• Size and temperature

• Distance and age