stars!!!
And work cited page (fun stuff).
The Life Cycle of Stars
Introduction
Hook: The Supernova is the largest explosion in the universe
The Life Cycle of Stars
The Birth of Stars: Nebulae
NebulaeĀ
Nebulae are large clouds of gas and dust (The Schools' Observatory).
Gravity causes the materials in the Nebula to clump together and begin to heat up, as well as collapse (NASA, āStar Basicsā).
The ProtostarĀ
The collapsed clumps of gas and dust form Protostars (NASA, āStar Basicsā).
The Protostar is heated up from its collapse, causing immense pressure, kickstarting nuclear fusion (NASA, āStar Basicsā).
The process of nuclear fusion is the longest part of a starās lifespan, and is called a Main Sequence Star NASA (āThe Life Cycles of Stars: How Supernovae Are Formedā).
Main Sequence Stars
This phase lasts between a few hundred thousand to a few trillion years, depending on the starās mass (NASA, āStar Basicsā).Ā
The nuclear fusion changes the hydrogen in the starās core to helium (āThe Life Cycles of Stars: How Supernovae Are Formedā).
The length of this phase depends on how much mass a star collected in the nebula, as more mass requires more fuel, and low mass requires less fuel, resulting in a longer lifespan (āThe Life Cycles of Stars: How Supernovae Are Formedā).
Star Death
Starts when stars donāt have any more hydrogen to turn into helium (NASA, āStar Basicsā).Ā
Low Mass stars have a different death compared to high mass stars (NASA, āStar Basicsā).Ā
Low Mass Stars collapse when there is no more fusion, causing gravity to puff up the star and form a Red Giant/Supergiant (āThe Life Cycles of Stars: How Supernovae Are Formedā).
The Red Giant begins to restart nuclear fusion and turns its helium into carbon (NASA, āStar Basicsā).Ā
The Red Giant sheds its layers, leaving only the planetary nebula (NASA, āStar Basicsā).Ā
When the last of the helium turns into carbon, gravity collapses it again, turning it into a White Dwarf (The Schools' Observatory).
The White Dwarf will eventually burn out and become a black Dwarf (The Schools' Observatory).
High Mass stars follow the same path up until the Red Giant phase (NASA, āStar Basicsā).Ā
The higher gravity pulls the carbon into clumps, causing nitrogen, oxygen, and iron to form (The Schools' Observatory).
When iron forms, fusion ceases, and the iron absorbs the starās energy (The Schools' Observatory).
When the energy is too great, it explodes out and forms a Supernova (The Schools' Observatory).
The leftover of the star is called a Neutron Star (The Schools' Observatory).
Neutron stars collapse when all the energy of the explosion and nuclear fusion ceases (The Schools' Observatory).
The star collapses one more time and becomes a black hole, the final step (NASA, āStar Basicsā).Ā
Conclusion
Why does this matter?
Stars inform us about how life is created (NASA, āStar Lifecycle - NASA Scienceā).
Stars form the basic building blocks of planets and galaxies, and can inform us about how galaxies and life form (NASA, āStar Lifecycle - NASA Scienceā).
It also offers perspective on how fleeting our existence is, and it may clue us in to what will happen to Earth.
Earth will eventually return to the cycle of Stars and go on to form new stars, planets, or even galaxies (NASA, āStar Lifecycle - NASA Scienceā).
Stars are one of the most beautiful creations in the universe, and it is distinctly human to be fascinated by the sky. Humans have always wondered about stars, they use them for navigation, calendars, and many other purposes. Our lives are shaped around stars, and we must try to understand them as best we can.
Works Cited
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The Schools' Observatory. āStellar Evolution | the Schoolsā Observatory.ā Schoolsobservatory.org, 2015, www.schoolsobservatory.org/learn/space/stars/evolution. Accessed 8 May 2026.
---. āThe Life Cycles of Stars: How Supernovae Are Formed.ā Nasa.gov, 7 May 2015, imagine.gsfc.nasa.gov/educators/lessons/xray_spectra/background-lifecycles.html. Accessed 8 May 2026.
---. āStar Lifecycle - NASA Science.ā Science.nasa.gov, 28 Sept. 2023, science.nasa.gov/mission/webb/star-lifecycle/. Accessed 15 May 2026.
Erickson, Kristen. āWhat Is a Supernova? | NASA Space Place ā NASA Science for Kids.ā Nasa.gov, NASA, 2017, spaceplace.nasa.gov/supernova/en/. Accessed 12 May 2026.
Lutz, Ota. āHow Scientists Captured the First Image of a Black Hole.ā NASA Jet Propulsion Laboratory (JPL), 2022, www.jpl.nasa.gov/edu/resources/teachable-moment/how-scientists-captured-the-first-image-of-a-black-hole/. Accessed 12 May 2026.
NASA. āA Poster-Size Image of the Beautiful Barred Spiral Galaxy NGC 1300.ā NASA Science, 11 Jan. 2005, science.nasa.gov/missions/hubble/a-poster-size-image-of-the-beautiful-barred-spiral-galaxy-ngc-1300/. Accessed 12 May 2026.
---. āExploring the Birth of Stars - NASA Science.ā Science.nasa.gov, 10 Apr. 2025, science.nasa.gov/mission/hubble/science/science-highlights/exploring-the-birth-of-stars/. Accessed 12 May 2026.
---. āMessier 16 (the Eagle Nebula) - NASA Science.ā Science.nasa.gov, 12 Sept. 2024, science.nasa.gov/mission/hubble/science/explore-the-night-sky/hubble-messier-catalog/messier-16/. Accessed 12 May 2026.
---. āStar Types - NASA Science.ā Science.nasa.gov, NASA, May 2024, science.nasa.gov/universe/stars/types/. Accessed 12 May 2026.
NASA, NASA. āāY Dwarfā Chillinā in Space (Artistās Concept).ā NASA Jet Propulsion Laboratory (JPL), 23 Aug. 2011, www.jpl.nasa.gov/images/pia14720-y-dwarf-chillin-in-space-artists-concept/. Accessed 12 May 2026.
---. āLight Echoes from a Red Supergiant - NASA.ā Nasa.gov, 23 Mar. 2008, www.nasa.gov/image-article/light-echoes-from-red-supergiant/. Accessed 12 May 2026.
---. āNew Chandra Movie Features Neutron Star Action - NASA.ā NASA, NASA, 8 Jan. 2013, www.nasa.gov/missions/chandra/new-chandra-movie-features-neutron-star-action/. Accessed 12 May 2026.
---. āWhite Dwarf Star Stein 2051 B - NASA Science.ā NASA Science, NASA, 7 June 2017, science.nasa.gov/asset/hubble/white-dwarf-star-stein-2051-b/. Accessed 12 May 2026.
NASA. āStar Basics.ā Science.nasa.gov, NASA, 22 Oct. 2024, science.nasa.gov/universe/stars/. Accessed 15 May 2026
---. āStar Lifecycle - NASA Science.ā Science.nasa.gov, 28 Sept. 2023, science.nasa.gov/mission/webb/star-lifecycle/. Accessed 15 May 2026.
NASA, NASA. āStars - NASA.ā NASA, 31 Mar. 2025, www.nasa.gov/gallery/stars/. Accessed 15 May 2026.

















