Types of Galaxies

A significant difference between spiral and elliptical galaxies is the —

• ongoing star formation, common in spiral galaxies but not in elliptical galaxies

• high star density at the core of spiral galaxies but not elliptical galaxies

• presence of irregular galaxies within elliptical galaxies but not spiral galaxies

• relatively large percentage of new stars in elliptical galaxies but not in spiral galaxies

What is our Galactic home? (Our Galaxy)

• Andromeda Galaxy

• Milky Way Galaxy

• Sombrero Galaxy

• Whirlpool Galaxy

Which of the following statement is true about black holes?

• they are extremely dense quantities of matter in space

• they have strong gravitational pulls that nothing can travel through

• made when a star that is 30 times heavier than the Sun dies

• all of the above

What are the four shapes of galaxies?

• elliptical, spiral, lenticular, irregular

• spiral, dwarf, lenticular, irregular

• lenticular, spiral, dwarf, oval

• irregular, spherical, spiral, elliptical

What type of galaxy is this?

• Spiral

• Lenticular

• Elliptical

• Irregular

What are characteristics of spiral galaxies?

• core is made out of old stars

• arms contain younger stars

• have a flattened disk with a central bulge and spiral arms

• all of the above

Which of the following statement is FALSE about dwarf galaxies?

• has low luminosity

• found in clusters and most abundant

• high mass

• small size

What the different types of dwarf galaxies?

• elliptical, spiral, irregular

• elliptical, lenticular, spiral

• spiral, lenticular, square

• elliptical, spiral, wave

What instrument was used to explore the extreme deep field in space?

• Spitzer Space telescope

• Hubble telescope

• Compton Gamma Ray Observatory Spacecraft

• COBE

What is a huge collection of of gas, dust, billions of stars, planets and other celestial objects?

• A star

• A planet

• A galaxy

• A comet