Astronomy Test

What was the primary Elements of the nebula that formed our solar system?

• Oxygen and nitrogen

• Carbon and helium

• Hydrogen and helium

• Iron and silicon

Which process marks the birth of a star?

• Gravitational collapse

• Gas dispersion

• Nuclear fusion

• Nebula formation

Where did the first object form in our solar system?

• At the outer edges

• In multiple locations

• Between planets

• At the center

What happens next when a main sequence star starts to run out of hydrogen fuel?

• It immediately explodes

• It becomes a black hole

• It turns into a nebula

• It becomes a red giant

What is a supernova?

• A new galaxy forming

• A collapsing nebula

• An exploding star

• A type of planet

What type of galaxy is the Milky Way?

• Irregular galaxy

• Elliptical galaxy

• Barred spiral galaxy

• Circular galaxy

Approximately how many stars are in the Milky Way?

• 300 billion

• 100 billion

• 500 billion

• 50 billion

What happens to light when it encounters a black hole?

• It speeds up

• It changes color

• It escapes partially

• It cannot escape

What is the approximate width of the Milky Way?

• 50,000 light years

• 75,000 light years

• 100,000 light years

• 200,000 light years

What causes galaxies to move away from each other?

• Solar winds

• Gravitational pull

• Universe expansion

• Star formation