What is the universe according to the passage?

• Everything we can touch, feel, sense, measure, and detect

• Only planets and stars

• Only galaxies and dust clouds

• Only living things

What holds a galaxy together?

• Gravity

• Magnetic fields

• Dark matter

• Solar winds

How many planets are in our solar system?

• Eight

• Nine

• Ten

• Seven

What is the Milky Way Galaxy?

• A galaxy with 400 billion stars

• A solar system with 8 planets

• A planet with many moons

• A star with many planets

How many galaxies are estimated to be visible from Earth?

• Approximately 2 trillion

• 400 billion

• 3.2 trillion

• 8 billion

What is a celestial body?

• An object in space

• A living organism

• A type of galaxy

• A type of planet

What does the Hubble Space Telescope image show?

• Thousands of galaxies

• A single galaxy

• A solar system

• A planet