Galaxies

What is the Hubble classification scheme?

• A system used to categorize galaxies based on their shapes and structures.

• A method for measuring the distance of stars in the universe.

• A technique for analyzing the chemical composition of celestial bodies.

• A framework for predicting the behavior of black holes.

What type of galaxy does not form a distinct shape or pattern?

• Spiral galaxy

• Elliptical galaxy

• Irregular galaxy

• Lenticular galaxy

What is the largest galaxy in the Local Group?

• The Milky Way Galaxy

• The Andromeda Galaxy

• The Triangulum Galaxy

• The Whirlpool Galaxy

What is the difference between active and inactive galaxies?

• Active galaxies have low luminosity and emit little energy.

• Inactive galaxies are brighter than active galaxies.

• Active galaxies have high luminosity and often emit large amounts of energy, while inactive galaxies do not exhibit such activity.

• Inactive galaxies are always found in clusters.

What are the main components of a galaxy?

• Stars, gas, dust, and dark matter.

• Planets, comets, asteroids, and meteoroids.

• Only stars and gas clouds.

• Galaxies are made up of light and energy.

What is a galaxy?

• A small cluster of stars and planets

• A huge system of millions or billions of stars, together with gas and dust, held together by gravity.

• A type of celestial body that orbits a planet

• A collection of asteroids and comets in space.

What is the role of gravity in the structure of a galaxy?

• Gravity causes galaxies to spin rapidly.

• Gravity holds the stars, gas, and dust together in a galaxy and governs its overall structure.

• Gravity has no significant effect on galaxies.

• Gravity only affects the outer regions of a galaxy.

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

• Spiral galaxies have a flat, rotating disk with stars, gas, and dust, while elliptical galaxies are more 3D and have a smooth, featureless light profile.

• Elliptical galaxies have a flat, rotating disk with stars, gas, and dust, while spiral galaxies are more 3D and have a smooth, featureless light profile.

• Spiral galaxies are primarily composed of dark matter, while elliptical galaxies are made up of bright stars only.

• Elliptical galaxies have more defined structures and arms compared to spiral galaxies.

What is the fate of galaxies in the distant future?

• Galaxies will remain unchanged and stable forever.

• Galaxies may collide and merge, leading to the formation of larger galaxies or eventually become part of a cosmic web.

• Galaxies will disappear completely over time.

• Galaxies will split into smaller fragments and cease to exist.

What type of galaxy is the Milky Way?

• Elliptical galaxy

• Spiral galaxy

• Irregular galaxy

• Lenticular galaxy