1.3 The Life Cycle of Stars

a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.

• nebula

• red giant

• luminosity

• mass

a contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun.

• black hole

• protostar

• neutron star

• high mass star

90 % of stars, they fuse hydrogen atoms to form helium atoms in their cores, including the sun.

• super red giants

• mass

• main sequence star

• supernova

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

a very large star of high luminosity and low surface temperature, thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.

• high mass stars

• nuclear fusion

• low mass stars

• red giant

Tags

NGSS.HS-ESS1-1

a small very dense star that formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.

• protostar

• nebula

• neutron star

• white dwarf

the largest stars in the universe in terms of volume, although they are not the most massive or luminous.

• heavy elements

• super red giants

• luminosity

• star core collapsesuper red giant stars

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Tags

NGSS.HS-ESS1-3

a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

• protostar

• red giant

• supernova

• luminosity

Tags

NGSS.HS-ESS1-3

a celestial object of very small radius and very high density, composed predominantly of closely packed neutrons

• star core collapse

• protostar

• neutron star

• white dwarf

a region of space having a gravitational field so intense that no matter or radiation can escape.

• luminosity

• mass

• nuclear fusion

• black hole

Tags

NGSS.HS-PS2-4

quantity of matter in a physical body.

• low mass stars

• high mass stars

• neutron star

• mass

Tags

NGSS.HS-PS1-7