8 Topic 4: The Universe

Front

What does a blue shift in a star's light indicate?

Back

The star is moving towards the Earth.

Front

What does a red shift in a star's light indicate?

Back

The star is moving away from the Earth.

Front

What is the shape of an elliptical galaxy?

Back

Rounded oval shape.

Front

What is the main sequence in stellar evolution?

Back

The longest stage in a star's life cycle.

Front

What does the Hertzsprung-Russell Diagram show?

Back

The relationship between a star's temperature and its luminosity.

Front

Which star is known as a hot and dim star?

Back

Sirius B.

Front

What is a galaxy?

Back

A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.

Front

What is the difference between a star and a planet?

Back

A star generates its own light through nuclear fusion, while a planet reflects light from a star.

Front

What is a black hole?

Back

A region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the life cycle of a star?

Back

A star goes through stages: nebula, main sequence, red giant, and then either a white dwarf, neutron star, or black hole.