The Big Bang, Galaxies and Stars

Front

What type of galaxy do we live in?

Back

Spiral galaxy: A galaxy characterized by its spiral shape, with arms that wind outward from the center.

Front

What does the Big Bang theory suggest?

Back

The universe is continually expanding: The Big Bang theory posits that the universe began from a very hot and dense state and has been expanding ever since.

Tags

NGSS.HS-ESS1-2

Front

Who discovered that our universe is made up of more than one galaxy?

Back

Edwin Hubble: An astronomer who provided evidence that the universe contains many galaxies beyond our own.

Front

What can a scientist learn about a star from its spectrum?

Back

A star's spectrum reveals its composition and temperature, helping scientists understand what the star is made of and how hot it is.

Front

How long does it take for the sun to orbit the center of the galaxy?

Back

225 million years: The sun takes approximately 225 million years to complete one orbit around the Milky Way's center.

Tags

NGSS.HS-ESS1-4

Front

What is a galaxy?

Back

A galaxy is a massive system that consists of stars, star clusters, gas, dust, and dark matter, bound together by gravity.

Tags

NGSS.MS-ESS1-2

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system, characterized by its spiral shape and numerous stars.

Tags

NGSS.MS-ESS1-2

Front

What is a star?

Back

A star is a luminous celestial body made of plasma, generating energy through nuclear fusion in its core.

Front

What is the difference between a spiral galaxy and an elliptical galaxy?

Back

A spiral galaxy has a flat, rotating disk with spiral arms, while an elliptical galaxy is more rounded and lacks the distinct arms.

Tags

NGSS.MS-ESS1-2

Front

What is the role of gravity in the formation of galaxies?

Back

Gravity pulls together gas and dust to form stars and galaxies, influencing their structure and evolution.

Tags

NGSS.HS-PS2-4