Cosmic Times 1929 Glossary Quiz

What is the Andromeda galaxy also known as?

• Messier 31

• NGC 224

• M32

• Milky Way

What is the period of the pulsation pattern directly related to in Cepheid variable stars?

• Size

• Intrinsic brightness

• Temperature

• Distance from Earth

What is a constellation?

• A specific grouping of stars

• A collection of asteroids

• A type of galaxy

• A group of planets

What is the cosmological constant in the context of general relativity?

• A term used to describe the expansion of the universe

• A measure of dark matter in the universe

• A constant term added by Einstein to his theory of relativity

• A unit of measurement for cosmic distances

What is the Doppler effect?

• The change in speed of an object due to its motion

• The change in wavelength of sound or light due to motion

• The change in brightness of an object due to its motion

• The change in color of an object due to its motion

What is the electromagnetic spectrum?

• The range of sizes of celestial bodies

• The range of frequencies that characterizes light

• The range of temperatures in the universe

• The range of colors visible in the night sky

What is a galaxy?

• A region of space with high levels of radiation

• A group of asteroids and comets

• A collection of stars and gas held together by gravity

• A collection of planets and moons

What is the intrinsic luminosity of a star?

• Its actual brightness and magnitude

• Its brightness as seen from other stars

• Its brightness as seen from a telescope

• Its apparent brightness as seen from Earth

What is a light year?

• The distance light travels in a year

• The distance light travels in a day

• The distance light travels in a month

• The distance light travels in an hour

What are the Magellanic Clouds?

• Globular clusters

• Elliptical galaxies

• Spiral galaxies

• Irregular dwarf galaxies