2B: Astronomy Fall Final (2024)

Front

What is a Main Sequence Star?

Back

A Main Sequence Star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core. Examples include our Sun.

Front

Which planet in our solar system has two small moons?

Back

Mars has two small moons named Phobos and Deimos.

Front

What planet did the ancient Maya use for time-keeping and navigation?

Back

The ancient Maya used Venus for time-keeping and navigation.

Front

What is a galaxy?

Back

A galaxy is a collection of stars, dust, and gas bound together by gravity.

Front

In which direction does Polaris point on Earth?

Back

Polaris always points in the North direction on Earth.

Front

What is the difference between inner and outer planets?

Back

Inner planets are rocky and closer to the Sun (Mercury, Venus, Earth, Mars), while outer planets are gas giants and farther from the Sun (Jupiter, Saturn, Uranus, Neptune).

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram is a scatter plot of stars showing the relationship between their absolute magnitudes and stellar classifications, helping to understand stellar evolution.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages: nebula, main sequence, red giant, and depending on its mass, it may end as a white dwarf, neutron star, or black hole.

Front

What is the difference between a comet and an asteroid?

Back

Comets are icy bodies that release gas or dust, forming a tail when near the Sun, while asteroids are rocky bodies that do not have tails.

Front

What is the role of gravity in the formation of stars?

Back

Gravity causes gas and dust in a nebula to collapse and form a star.