The Big Bang, Galaxies, and Stars

Front

What is the Big Bang Theory?

Back

The Big Bang Theory posits that the universe began as a singularity, a point of infinite density, which rapidly expanded to form all matter and energy in the universe.

Tags

NGSS.HS-ESS1-2

Front

What stage is our sun currently in?

Back

Main Sequence

Front

What does a redshift in a star's light indicate?

Back

A redshift indicates that the star is moving away from the Earth.

Tags

NGSS.HS-ESS1-2

Front

Which type of star is the hottest?

Back

O-type stars are the hottest type of stars.

Front

What type of galaxy is characterized by a lack of a defined shape?

Back

Irregular galaxies lack a defined shape.

Front

What is a galaxy?

Back

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

Tags

NGSS.MS-ESS1-2

Front

What are the three main types of galaxies?

Back

The three main types of galaxies are spiral, elliptical, and irregular.

Front

What is a protostar?

Back

A protostar is an early stage in the formation of a star, where gas and dust collapse under gravity but nuclear fusion has not yet begun.

Front

What is the life cycle of a star?

Back

The life cycle of a star includes stages: nebula, protostar, main sequence, red giant, and then either a white dwarf, neutron star, or black hole.

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Front

What is a nebula?

Back

A nebula is a giant cloud of dust and gas in space, often the birthplace of stars.