Universe & Solar System Test

Analyze this HR Diagram. Which group of stars is considered to have lower than average luminosity as well as a higher than average temperature?

• Giants
• Main Sequence
• White Dwarfs
• Super Giants

A collection of dust and gases where stars can form is called a:

• Galaxy
• Nebula
• Black Hole
• Supernova

Our Sun is located near the edge of a _____ ______ galaxy, named the ____________.

• disc shaped, Milky Way
• disc shaped, Solar System
• elliptical shaped, Milky Way
• elliptical shaped, Solar System

Black holes can be found in the Universe. When examining a black hole with a special telescope, scientist determined that a specific black hole was emitting waves with a wavelength of 1.41x10^-12 Hz. The special telescope most likely detects:

• microwaves
• visible light
• x-rays
• gamma rays

Which star has the lowest temperature?

• A
• B
• C
• D

What type of galaxy is this?

• Spiral
• Elliptical
• Irregular 
• Irrational

The stars and all the other matter in a galaxy are held together by which of the following?

• Dark matter
• Inertia
• Gravity
• Magnetism

The Hertzsprung-Russell diagram, for classifying stars based on the relationship between their brightness and their temperature and color, is provided. In comparison to the Sun, Betelgeuse -

• is smaller in diameter
• is brighter and hotter
• is less bright but hotter
• is cooler and brighter

Light years are used by astronomers to measure what property of celestial bodies?

• Distance from Earth
• Time since formation
• Internal temperature
• Absolute brightness

A scale diagram of four galaxies is provided. Which galaxy has a diameter closest to 75,000 light years?

• Galaxy JK23
• Galaxy TO37
• Galaxy RB17
• Galaxy WD28