Advertisement.

EnchantedLearning.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
Click here to learn more.

ad
(Already a member? Click here.)


You might also like:
Star Death (Huge stars)Star Death (Largest stars)NebulaeStar DeathBirth of StarsToday's featured page: United Kingdom


Table of Contents Enchanted Learning
All About Astronomy
Site Index
Our Solar System Stars Glossary Printables, Worksheets, and Activities
The Sun The Planets The Moon Asteroids Kuiper Belt Comets Meteors Astronomers

The Stars
Lifecycle Nuclear Fusion Brightest Stars Galaxies Other Solar Systems Constellations Why Stars Twinkle
Birth Death Star Types Closest Stars Nebulae Major Stars The Zodiac Activities, Links

The Birth of Stars The Death of Stars
Sun-like Stars
(Up to 1.5 times the mass of the Sun)
Huge Stars
(From 1.5 to 3 times the mass of the Sun)
Giant Stars
(Over 3 times the mass of the Sun)

THE DEATH OF SUN-LIKE STARS
(with a mass up to 1 1/2 times that of the Sun)


A stars expands as it grows old. As the core runs out of hydrogen and then helium, the core contacts and the outer layers expand, cool, and become less bright; this is a red giant.

After expanding and reaching the enormous red giant phase, the outer layers of the star continue to expand. As this happens, the core contracts; the helium atoms in the core fuse together, forming carbon atoms and releasing energy. The core is now stable since the carbon atoms are not further compressible.


The Egg nebula: a planetary nebula formed a few hundred years ago.
Now the outer layers of the star start to drift off into space, forming a planetary nebula (a planetary nebula has nothing to do with planets).

The star loses most of its mass to the nebula. The star cools and shrinks; it will eventually be only a few thousand miles in diameter!


A White dwarf star: (circled) in the globular cluster M4.
The star is now a white dwarf, a stable star with no nuclear fuel. It radiates its left-over heat for billions of years. When its heat is all dispersed, it will be a cold, dark black dwarf - essentially a dead star (perhaps replete with diamonds, highly compressed carbon).

NOVA
A nova is a white dwarf star that suddenly increases in brightness by several magnitudes. It fades very slowly.



Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below

Overview of Site
What's New
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Site Index

K-3
Crafts
K-3 Themes
Little Explorers
Picture dictionary
PreK/K Activities
Rebus Rhymes
Stories
Writing
Cloze Activities
Essay Topics
Newspaper
Writing Activities
Parts of Speech

Fiction
The Test of Time
iPhone app
TapQuiz Maps - free iPhone Geography Game

Biology
Animal Printouts
Biology Label Printouts
Biomes
Birds
Butterflies
Dinosaurs
Food Chain
Human Anatomy
Mammals
Plants
Rainforests
Sharks
Whales
Physical Sciences: K-12
Astronomy
The Earth
Geology
Hurricanes
Landforms
Oceans
Tsunami
Volcano
Languages
Dutch
French
German
Italian
Japanese (Romaji)
Portuguese
Spanish
Swedish
Geography/History
Explorers
Flags
Geography
Inventors
US History

Other Topics
Art and Artists
Calendars
College Finder
Crafts
Graphic Organizers
Label Me! Printouts
Math
Music
Word Wheels

Click to read our Privacy Policy

E-mail


Enchanted Learning Search

Search the Enchanted Learning website for:



Advertisement.



Advertisement.



Advertisement.



Copyright ©1999-2016 EnchantedLearning.com ------ How to cite a web page