Universe and galaxies review

What is made up of stars and the planets that orbit them?

• Universe
• Galaxies
• Planets
• Orbitals

All of space and its contents make up the ........

• Universe
• galaxies
• planets
• stars

Who discovered that galaxies are objects far from us and came up with a system to classify them?

• Albert Einstein
• Isaac Newton
• Edwin Hubble
• Tony Stark

Which type of galaxy appears rounded and contains only old stars?

• Elliptical
• Lenticular
• Irregular
• Spiral

Which type of galaxy has a central bulge with spiral arms that contain a mix of young and old stars?

• Spiral galaxy
• Elliptical galaxy
• Irregular galaxy
• Lenticular galaxy

Which type of galaxy has no obvious shape or structure and is the site of intense star formation?

• Spiral galaxy
• Irregular galaxy
• Elliptical galaxy
• Lenticular galaxy

In order to measure the size of a galaxy which of the following do we need to know?

• Distance from Earth
• Temperature of the star
• Brightness of the star
• Mass of the star

What is Edwin Hubble's classification system for galaxies based on?

• Temperature
• Appearance
• Distance
• Smell

If 2 galaxies collided it is highly likely that the stars in those galaxies will collide. True or False

• True
• False

Galaxies can change their shape. True or False

• True 
• false