Deep Sky Objects

An open star cluster is:

• a group of stars that are gravitationally bound and were formed from the same molecular cloud

• a single star with no surrounding stars

• a galaxy with billions of stars

• a black hole surrounded by stars

A globular star cluster is a spherical collection of stars that orbits a galactic core as a satellite. What is a globular star cluster?

• A type of galaxy

• A spherical collection of stars

• A single star

• A planetary system

Which type of star cluster is loosely bound by gravitational attraction?

• Open star cluster

• Globular star cluster

The Milky Way galaxy contains how many known globular clusters?

• 150-200

• 200-250

• 250-300

• 300-350

What is a nebula?

What is a galaxy?

Fill in the blank: Galaxies are classified according to their apparent shape: elliptical, spiral, or ______.

• irregular

• circular

• rectangular

• triangular

Which of the following is a catalogue of astronomical objects?

What are SPIRIT I and II telescopes optimized for viewing?

• Very bright objects like the Sun or Moon

• Deep sky objects such as star clusters, nebulae, and galaxies

• Only planets like Jupiter and Saturn

• Terrestrial landscapes

SPIRIT telescopes are not suitable for viewing very bright objects because:

• they are designed for faint objects.

• they have a narrow field of view.

• they are too expensive.

• they are not portable.