About This Chapter
Who's it for?
Anyone who needs help learning or mastering introductory astronomy material will benefit from taking this course. There is no faster or easier way to learn introductory astronomy. Among those who would benefit are:
- Students who have fallen behind in understanding star death and stellar remnants
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about star death and stellar remnants
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the star death and stellar remnants chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the star death and stellar remnants chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any star death and stellar remnants question. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in a star death and stellar remnants unit of a standard intro to astronomy course. Topics covered include:
- Supernova and supergiant star life cycles
- The life cycle of neutron stars
- Stellar remnant characteristics of white dwarf stars
- The death of a star
- Giant stars and helium fusion
- The death of lower-main-sequence stars
- Planetary nebulae
- Helium fusion and degenerate electron pressure
- Binary systems and the death of stars
- How massive stars die
- Neutron stars and supernovae
- Pulsars defined
- The life cycle of black holes
- The origin of gamma-ray bursts
1. Red Giant, Horizontal & Asymptotic Giant Branch Stars
This lesson will outline how stars of low to intermediate mass die as seen on the H-R diagram. We'll cover important key terms such as red giant branch stars, asymptotic branch stars, and horizontal branch stars.
2. Life Cycle of Neutron Stars
Discover the life of a neutron star, including how it's born after a supernova explosion and how its extreme pressure causes protons and electrons to combine into neutrons. Discover also how pulsars are rotating neutron stars that will eventually slow down to become regular neutron stars.
3. Binary Pulsars & Pulsar Planets
This lesson will describe important concepts related to pulsars, namely binary pulsars, such as pulsar planets, millisecond pulsars, and gravitational waves.
4. Cosmic Rays: Definition & Origin
This lesson will explain what cosmic rays are (including primary and secondary cosmic rays), where they come from, if you should be worried about them, and what you can do to protect yourself from them if need be.
5. What Are White Dwarfs? - Stellar Remnant Characteristics
White dwarfs are incredible little stellar remnants. Which begs the question, are they actually stars or not? This lesson will tell you if and why and how white dwarfs come to be. That, and you'll learns some incredible facts about them as well.
6. Giant Stars and Helium Fusion
This lesson will explain to you why a star nearing its end will become a giant star, and how the energy generating processes in its core will change as a result.
7. How Lower-Main-Sequence Stars Die
Not every star lives or dies the same way. Red dwarfs and medium-sized stars have key differences that determine their lifespan and how they die. This lesson will tell you why that is the case.
8. What Are Planetary Nebulae?
This lesson will define something very cool and beautiful called a planetary nebula. You'll not only learn what it is but how it's formed, and why it produces all those amazing colors!
9. Helium Fusion and Degenerate Electron Pressure
Standard gas laws need not apply under the special circumstances described in this lesson with concepts like degeneracy, degenerate electron pressure, helium fusion, and the Coulomb barrier.
10. Binary Systems and Novae
This lesson will explain for you something known as the Algol paradox, what binary stars are, and how Roche lobes, the inner Lagrange point, novae, accretion disks, and novae are all involved in binary systems.
11. How Massive Stars Begin To Die
The ways massive stars and smaller stars evolve near their end are very different. This lesson will explain where they diverge, why, and what factors influence the beginning of the end for massive stars.
12. What are Neutron Stars and Supernova Remnants?
This lesson will describe what happens after a supernova explosion occurs. Something known as a supernova remnant or neutron star may remain after the explosion, and you'll find out why that's important and how they form.
13. The Different Types of Supernovae
There are different types of supernovae, and this lesson will tell you what they are and what their differences are. We'll mainly focus on type II supernovae and types Ia and Ib supernovae.
14. Supernova: How Massive Stars Explode
This lesson will explain how it is that a supernova comes to be by delving into how concepts like iron, core contraction, a core bounce, the strong force, and neutrinos all play a role in this event.
15. What Are Pulsars?
This lesson will define and describe pulsars. Importantly, you'll learn why the term is a bit of a misnomer, what acts as a pulsar and why, and what it pulses out.
16. Life Cycle of Black Holes
Learn about black holes, their myths and their reality. Learn how black holes form after stars undergo supernovae and create singularities. Discover how big black holes grow, how scientists find black holes and where black holes are located in the universe.
17. Black Holes: Escape Velocity and the Singularity
This lesson defines black holes and introduces two important concepts related to them, escape velocity and singularity, so you can build a base for further investigation of concepts related to black holes.
18. Black Holes: the Event Horizon and Schwarzschild Radius
This lesson describes the event horizon and the Schwarzschild radius, including their implications on the gravitational attraction a black hole exerts on the universe around it.
19. Finding and Leaping into Black Holes
Did you ever wonder what would happen if you fell into a black hole? Is it a good idea to use it for time travel? And what would your friends see as you fell in? Using this lesson on finding one might reveal it's not such a good idea. Or is it?
20. The Origin of Gamma-ray Bursts
Gamma-ray bursts are so powerful, they may one day destroy us. But where do they come from? Find out as we define gamma-ray bursts, hypernovae, and magnetars in this lesson.
21. Cosmic Recycling: From Stellar Death to Human Life
Did you know that you are related to the stars you see in the sky? Did you know that you're made of recycled material? This lesson will tell you how and why.
22. Life Cycle of a Star Project Ideas
The life cycle of a star is a topic that begs to be expanded beyond a lecture. These project ideas can give your students new ways to interact with this material.
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Other chapters within the Intro to Astronomy: Help and Review course
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- How Scientists Think and Work: Help and Review
- Matter, Energy, and Astronomy: Help and Review
- Light in Astronomy: Help and Review
- Newton's Laws in Astronomy: Help and Review
- Rotational Motion and Astronomy: Help and Review
- Orbits, Tides, and Gravity: Help and Review
- Relativity in Time and Space: Help and Review
- Conservation Laws in Astronomy: Help and Review
- Earth's Spheres and Astronomy: Help and Review
- The Earth, Sky, and Moon: Help and Review
- The Moon's Form and Phases: Help and Review
- The Atmosphere on Earth and Other Planets: Help and Review
- Influences on Climate: Help and Review
- The Sun and Energy: Help and Review
- Star Types and Significance: Help and Review
- Measurement of Star Qualities: Help and Review
- The Birth and Life of Stars: Help and Review
- Formation of the Solar System: Help and Review
- Galaxies, Stars and Solar Systems
- Components of the Solar System: Help and Review
- Small Celestial Bodies in the Solar System: Help and Review
- The Milky Way Galaxy: Help and Review
- Characteristics of Galaxies: Help and Review
- Life & the Universe: Help and Review
- Navigation and Timekeeping in Astronomy: Help and Review
- Telescopes: Help and Review