E&S Unit 1 Stars & the Universe Vocabulary

A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.

• A star
• A planet
• A comet
• A galaxy

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

NGSS.HS-PS1-8

a graph that compares a star's brightness and temperature; can determine relative age of stars

• Hertzsprung-Russell Diagram
• Stellar Luminosity Chart
• Star Temperature Graph
• Brightness Comparison Chart

The apparent brightness of a star

• Luminosity

• Depends on the star's color
• Depends on the star's size
• Depends on the star's age

the brightness of a star as seen from Earth

• The distance of the star from Earth
• The size of the star
• The color of the star
• The apparent brightness

A prominent region on the HR diagram where stars spend most of their lifetime undergoing hydrogen fusion in their cores.

• Main Sequence
• Red Giant Branch
• Horizontal Branch
• Asymptotic Giant Branch

A measure of the heat energy of a star's surface, typically expressed in Kelvin (K).

• Luminosity
• Temperature
• Mass
• Radius

A large, cool, and luminous star that forms after a main-sequence star depletes its core hydrogen and expands.

• Red Giant
• White Dwarf
• Neutron Star
• Black Hole

Tags

NGSS.HS-ESS1-3

The remnant core of a low- to medium-mass star after it has exhausted its nuclear fuel and shed its outer layers.

• Black Hole
• White Dwarf
• Neutron Star
• Red Giant

A massive, highly luminous star that is much larger and brighter than the Sun.

• Supernova
• White Dwarf
• Red Giant
• Supergiant

The process of how stars change over time due to changes in their internal structure and nuclear reactions.

• Stellar Evolution
• Planetary Motion
• Galactic Collision
• Nebular Hypothesis

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3