Unit 1

What is the distance that light travels through space in 1 year?

• Light-year
• Apparent magnitude
• Luminosity
• Absolute magnitude

What is the measure of a star’s brightness as seen from Earth?

• Absolute magnitude
• Light-year
• Apparent magnitude
• Luminosity

What is the solar system?

• A single planet orbiting the sun
• A collection of galaxies
• A collection of large and small bodies that orbit the sun
• A collection of stars and gas

What is apparent magnitude?

• The distance that light travels through space in 1 year
• The brightness of a star at a standard distance
• The actual brightness of a star
• The measure of a star’s brightness as seen from Earth

What does luminosity mean in astronomy?

• The measure of a star’s brightness as seen from Earth
• The brightness of a star at a standard distance
• The distance that light travels through space in 1 year
• The actual brightness of a star

What is the universe?

• Space and all the matter and energy in it
• A large cloud of gas and dust
• A collection of stars
• A single galaxy

What is the actual brightness of a star?

• Luminosity
• Apparent magnitude
• Absolute magnitude
• Light-year

What is a white dwarf?

• A spherical body that orbits the sun
• The hot, dense core of matter that remains from the collapse of a low-mass star
• A large celestial body composed of gas and emits light
• A large collection of stars, gas, and dust held together by gravity

How would you define the solar system?

• A single planet orbiting the sun
• A collection of large and small bodies that orbit the sun
• A collection of galaxies
• A collection of stars and gas

What is a planet?

• A large cloud of gas and dust
• A small collection of stars
• A moon orbiting a planet
• A spherical body that orbits the sun