Space Exploration: Jovian and Terrestrial Planets

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Questions and Answers

What is a galaxy?

A cluster of asteroids and meteors in space
A group of terrestrial planets orbiting a star
A group of Jovian planets held together by gravity
A collection of gas, dust, and billions of stars held together by gravity (correct)

Why is the Milky Way Galaxy called the Milky Way?

Because it is made up of milk-like substances
Due to the abundance of milk-producing stars
It appears as a milky band of light in the sky (correct)
Because it contains a lot of dairy planets

Where is our Solar System located in the Milky Way Galaxy?

At the center of the galaxy
In a different galaxy altogether
On the outskirts of the galaxy (correct)
Within a cluster of asteroids

What is the approximate number of stars in the Milky Way Galaxy?

100 billion stars (D) Signup and view all the answers

What is the primary function of the Sun in our solar system?

To maintain the orbits of the planets (B) Signup and view all the answers

Which of the following is NOT a component of the solar system according to the text?

Quasars (D) Signup and view all the answers

What is the primary factor that drives the seasons, ocean currents, and weather on Earth?

The gravitational pull of the Sun (C) Signup and view all the answers

Which celestial body is described as a hot ball of glowing gases in the text?

The Sun (D) Signup and view all the answers

What are asteroids and comets considered to be?

Remnants from the formation of the solar system (D) Signup and view all the answers

How are asteroids and comets compared to planets and moons?

They have remained largely unchanged over time (A) Signup and view all the answers

What are comets made of when frozen?

Frozen gases, rock, and dust (A) Signup and view all the answers

What is a meteoroid called when it survives the trip through the Earth's atmosphere and hits the ground?

Meteorite (B) Signup and view all the answers

Define the Doppler Effect.

An apparent shift in frequency of a wave caused by relative motion between the source of the wave and the observer. Signup and view all the answers

What is the definition of Wavelength?

The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave. Signup and view all the answers

Explain what Pitch refers to in the context of sound.

The highness or lowness of sound. Signup and view all the answers

What is Redshift and why is it significant?

Redshift is when light is shifted toward lower frequencies or the red end of the spectrum. It is significant in understanding the expansion of the universe. Signup and view all the answers

Define Blueshift and explain its importance.

Blueshift is when visible light is shifted toward higher frequencies or the blue end of the spectrum. It is important for analyzing wavelengths of light. Signup and view all the answers

What is the primary cause of Cosmological redshift?

The expansion of space. Signup and view all the answers

Explain the concept of Gravitational redshift.

Gravitational redshift occurs when light is shifted due to the massive amount of matter inside of a galaxy. Signup and view all the answers

What is the difference between Frequency and Wavelength?

Frequency is the rate at which a vibration occurs, while Wavelength is the distance between successive crests of a wave. Signup and view all the answers

How is Blueshift determined and what instrument is used for this purpose?

Blueshift is determined by studying the wavelengths of light. The instrument used for this purpose is a Spectrometer or spectrograph. Signup and view all the answers

What is the Doppler Effect?

The Doppler Effect is an apparent shift in frequency of a wave caused by relative motion between the source of the wave and the observer. Signup and view all the answers

Explain the concept of Wavelength.

Wavelength is the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave. Signup and view all the answers

Define Pitch in the context of sound.

Pitch refers to the highness or lowness of sound. Signup and view all the answers

What is Redshift and how is it defined?

Redshift is the term used when light is shifted toward lower frequencies or toward the red end of the spectrum. Signup and view all the answers

Explain Blueshift and its significance.

Blueshift is the term used when visible light is shifted toward higher frequencies or toward the blue end of the spectrum. Signup and view all the answers

What is Cosmological redshift and what causes it?

Cosmological redshift is a redshift caused by the expansion of space. Signup and view all the answers

How is Blueshift determined and what instrument is used?

Blueshift is determined by the study of the wavelengths of light using a spectrometer or spectrograph. Signup and view all the answers

What are the three types of Redshift mentioned in the text?

The three types of Redshift mentioned are from the universe expansion, from the movement of galaxies relative to each other, and from gravitational redshift. Signup and view all the answers

Why is Blueshift not something you see with your eyes?

Blueshift is not something you see with your eyes because it is determined by the study of the wavelengths of light. Signup and view all the answers

Flashcards

Galaxy

A large collection of gas, dust, and billions of stars held together by gravity.

Milky Way Galaxy

Our galaxy, appearing as a milky band of light in the sky.