Astronomy Final Exam part 1

Front

What is the ecliptic?

Back

The ecliptic is the apparent path of the Sun across the sky, which is also the plane of Earth's orbit around the Sun. It is the reference line for the positions of the planets.

Front

What is the relationship between luminosity and temperature in main sequence stars?

Back

For main sequence stars, the greater the luminosity, the higher the temperature. This relationship is due to the processes of nuclear fusion occurring in the star's core.

Front

What are circumpolar stars?

Back

Circumpolar stars are stars that are located near the celestial poles and never set below the horizon as seen from a particular latitude. They appear to move in circular paths around the pole.

Front

Which planet is most similar to Earth in size and structure?

Back

Venus is most similar to Earth in size and structure, often referred to as Earth's 'sister planet' due to their comparable diameters and compositions.

Front

Why can you see Leo in the sky in April but not in October?

Back

You cannot see Leo at midnight in October because Earth has revolved in its orbit around the Sun, changing the position of constellations in the night sky.

Front

What is the significance of the horizon in astronomy?

Back

The horizon is the line where the Earth meets the sky. It is significant in astronomy as it defines the limit of what can be observed from a specific location.

Front

Define the term '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. This phase represents the majority of a star's life.

Front

What is the difference between rotation and revolution in astronomy?

Back

Rotation refers to the spinning of a celestial body on its axis, while revolution refers to the movement of a celestial body around another body in an orbit.

Front

What are zodiac constellations?

Back

Zodiac constellations are the twelve constellations that lie along the ecliptic, through which the Sun, Moon, and planets appear to move.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our Solar System, characterized by its spiral shape and composed of billions of stars, gas, and dust.