Galaxies

What is the difference between a galaxy and a star cluster?

• A galaxy is a large collection of stars, gas, and dust, while a star cluster is a smaller group of stars bound by gravity.

• A galaxy is a small group of stars, while a star cluster is a large collection of stars, gas, and dust.

• A galaxy is a type of star cluster that is much larger in size.

• A galaxy is a collection of planets, while a star cluster is a collection of stars.

What is a supernova?

• A powerful explosion that occurs at the end of a star's life cycle, often leading to the formation of neutron stars or black holes.

• A type of star that is larger than the sun and burns out quickly.

• A celestial event where two stars collide and merge into one.

• A phenomenon where a star suddenly increases in brightness and then fades away.

What is the difference between a spiral galaxy and an elliptical galaxy?

• Spiral galaxies are more rounded and lack distinct structure, while elliptical galaxies have a flat, rotating disk with arms.

• Spiral galaxies have a flat, rotating disk with arms, while elliptical galaxies are more rounded and lack the distinct structure of spiral arms.

• Spiral galaxies are smaller and less bright than elliptical galaxies.

• Elliptical galaxies have more stars than spiral galaxies.

What type of galaxy is the Milky Way?

• Elliptical

• Spiral

• Irregular

• Lenticular

What is the role of gravity in galaxy formation?

• Gravity pushes gas and dust away from each other.

• Gravity pulls together gas and dust to form stars and galaxies.

• Gravity has no effect on galaxy formation.

• Gravity only affects the movement of stars within galaxies.

How many galaxies have we discovered?

• Millions

• Billions

• Thousands

• Hundreds

What are the three main types of galaxies?

• Spiral, Elliptical, Irregular

• Lenticular, Spiral, Irregular

• Spiral, Elliptical, Barred

• Irregular, Dwarf, Lenticular

What is the significance of the Hubble Space Telescope in studying galaxies?

• It has provided deep space images that have helped us understand the structure and evolution of galaxies.

• It is the first telescope to capture images of black holes.

• It was launched to study the surface of Mars.

• It primarily focuses on the study of exoplanets.

What is responsible for holding the stars, gas, and dust together in a galaxy?

• Electromagnetism

• Nuclear Force

• Gravity

• Friction

What is dark matter?

• A form of matter that does not emit light or energy, making it invisible, but it exerts gravitational effects.

• A type of energy that can be seen and measured directly.

• A form of matter that is visible and can be detected with telescopes.

• A theoretical concept that has no physical existence.