Understanding Quasars

What is a quasar?

• A type of star

• A small planet

• The extremely luminous nucleus of a galaxy

• A type of black hole

What does the term 'quasar' stand for?

• Quiet star

• Quantum star

• Quasi-stellar radio source

• Quick star

What was Cygnus A initially observed as?

• A source of radio waves

• A supernova

• A new planet

• A black hole

What does a redshift in the spectrum of a celestial object indicate?

• The object is cooling down

• The object is changing color

• The object is very far away

• The object is moving closer

Tags

NGSS.HS-ESS1-2

What are the bright emission lines in a spectrum compared to?

• A star map

• A black hole

• A rainbow

• A barcode for a product

Tags

NGSS.HS-PS4-3

What type of galaxies are radio-quiet quasars often located in?

• Elliptical galaxies

• Spiral galaxies

• Irregular galaxies

• Dwarf galaxies

What is believed to be at the center of a quasar?

• A neutron star

• A supermassive black hole

• A massive star

• A giant planet

What is the main reason quasars are difficult to observe in their galaxies?

• They emit no light

• They are too far away

• Their light overpowers the light of surrounding stars

• They are too small

What was 3C 273 initially thought to be?

• A comet

• A black hole

• A star in the Milky Way

• A planet

What is the main characteristic of quasars that makes them detectable from Earth?

• Their size

• Their speed

• Their temperature

• Their luminosity