Unit 5: Universe Review

Front

What is a large celestial body that is composed of gas and emits light?

Back

Star

Front

What is the Big Bang Theory?

Back

The most widely accepted scientific theory about the origin of the universe.

Front

To which spectral class does our star, the Sun, belong?

Back

G

Front

What does redshift indicate?

Back

An object moving away from an observer.

Front

What type of star is Alpha Canis Majoris with a luminosity of 0.02 and a surface temperature of 24,800 Kelvin?

Back

White Dwarf.

Front

What is a nebula?

Back

A large cloud of gas and dust in space, often the birthplace of stars.

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 a planet?

Back

A celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris.

Front

What is the difference between a star and a planet?

Back

A star emits its own light and heat through nuclear fusion, while a planet reflects light from a star.

Front

What is the life cycle of a star?

Back

Stars form from nebulae, go through stages like main sequence, red giant, and end as white dwarfs, neutron stars, or black holes.