Astrophysics: Structure of the Universe Quiz

Which galaxy contains our solar system?

• Andromeda Galaxy
• Milky Way Galaxy
• Triangulum Galaxy
• Centaurus Galaxy

How many stars are estimated to be in the Andromeda galaxy?

• 100 million
• 1 billion
• 1 trillion
• 10 trillion

What unit is used to measure gravitational field strength?

• Watts
• Newtons per kilogram
• Joules
• Pascals

Which of the following is NOT a key orbital relationship mentioned?

• Moons orbiting planets
• Planets orbiting stars
• Stars orbiting galaxies
• Artificial satellites orbiting Earth

What mathematical formula represents orbital speed?

• v = πr² ÷ T
• v = 2πr ÷ T
• v = r × T ÷ 2π
• v = T ÷ 2πr

Why do comets move faster when closer to the Sun?

• Increased solar wind
• Stronger gravitational attraction
• Reduced atmospheric resistance
• Magnetic field interactions

How many galaxies are estimated to exist in the universe?

• Millions
• Hundreds of millions
• Billions
• Trillions

What determines the gravitational field strength of a celestial body?

• Color
• Temperature
• Mass and size
• Rotation speed

Which of these objects would have the strongest gravitational field?

• A small asteroid
• The Moon
• Earth
• Jupiter

What does the variable 'r' represent in the orbital speed formula?

• Rotation speed
• Radius
• Time period
• Velocity