Milky Way Structure and Characteristics

The Milky Way is a barred spiral galaxy with three main components: the galactic disc, bulge, and halo. The disc is a flat, circular area with spiral arms where new stars form. The bulge is a dense center with a supermassive black hole, Sagittarius A. The halo surrounds the disc and bulge, containing old stars in globular clusters. The Milky Way has 100-400 billion stars and many planets.

What type of galaxy is the Milky Way classified as?

• Lenticular galaxy

• Barred spiral galaxy

• Irregular galaxy

• Elliptical galaxy

Which component of the Milky Way is responsible for most new star formation?

• Galactic bulge

• Galactic halo

• Galactic disc

• Galactic core

What is the primary characteristic of the galactic bulge?

• It contains new star formation

• It is a hyper-dense collection of matter

• It is a flattened circular volume

• It is a region with no stars

What is located at the center of the galactic bulge?

• A massive star cluster

• A supermassive black hole

• A large gas cloud

• A bright nebula

What is the estimated mass of the supermassive black hole at the center of the Milky Way?

• 2.5 to 3 million times the mass of the sun

• 1 to 2 million times the mass of the sun

• 4.1 to 4.5 million times the mass of the sun

• 5 to 6 million times the mass of the sun

Which part of the Milky Way is not visible from Earth due to gas and dust?

• Galactic core

• Galactic bulge

• Galactic halo

• Galactic disc

In which spectrum can the full image of the Milky Way be recorded?

• Radio waves

• X-ray and infrared

• Ultraviolet

• Visible light

Which part of the Milky Way is known for having the oldest stars?

• Galactic disc

• Galactic core

• Galactic bulge

• Galactic halo

What type of clusters are found in the galactic halo?

• Open clusters

• Globular clusters

• Nebular clusters

• Star-forming clusters

How many stars does the Milky Way approximately contain?

• 100 to 400 billion

• 50 to 100 billion

• 10 to 40 billion

• 500 to 800 billion