Astronomy

Front

What are the two main elements that make up most of the sun?

Back

Helium and hydrogen.

Front

What position must the Moon be in for a solar eclipse to be observed from Earth?

Back

Position 1.

Front

What term describes the moon's shape as it appears to get smaller?

Back

Waning.

Front

Which stage in stellar evolution represents a protostar?

Back

Stage 1.

Front

What two characteristics are used to classify stars?

Back

Luminosity and temperature.

Front

What is the process called when a star forms from a cloud of gas and dust?

Back

Stellar formation.

Front

What is the difference between a solar eclipse and a lunar eclipse?

Back

A solar eclipse occurs when the Moon passes between the Earth and the Sun, while a lunar eclipse occurs when the Earth passes between the Sun and the Moon.

Front

What is the significance of the Hertzsprung-Russell diagram in astronomy?

Back

It classifies stars based on their luminosity and temperature.

Front

What is the main source of energy for the Sun?

Back

Nuclear fusion of hydrogen into helium.

Front

What is the term for the apparent movement of the Moon through its phases?

Back

Lunar phases.