About This Chapter
Intro to Life in the Universe - Chapter Summary
Does extraterrestrial life exist in our universe? In this astronomy chapter, our expert instructors will explain theories and predictors related to intelligent life on distant planets. Our short video lessons discuss the work of scientist Stanley Miller, as well as how the human lifetime relates to time in the universe. By the end of the chapter, you should be able to:
- Compare human lifetime to the universe
- Assess the existence of intelligent life on other planets and throughout the universe
- Recognize planetary factors that can predict extraterrestrial life
- Name planets around distant stars
- Evaluate the theories and experiments of Stanley Miller
As you work through the chapter, take the short quizzes that accompany each lesson. These self-assessments are designed to solidify your understanding of the information. You can submit questions to our instructors if any arise, and you'll be able to revisit the lessons as many times as needed. The chapter is also available to study around-the-clock.
1. Comparing the Human Lifetime to the Universe
Did you ever wonder how long your lifespan actually is compared to the lifespan of the entire universe if it's condensed to one year? This lesson will tell you that and much more.
2. Intelligent Life in Our Universe
This lesson will explore the possibility of finding intelligent life beyond Earth by traveling to it or by detecting its signals, as well as the chances that such life exists in the first place.
3. Is There Life on Other Planets?
This lesson will explore the places and conditions in our solar system and beyond that may make life possible. We'll discuss extremophiles, the habitable zone, Mars, and Europa.
4. Planetary Predictors of Extraterrestrial Life
Investigate what is needed for life to exist anywhere and the implications for life in our solar system beyond Earth. Consider Mars and some of the moons of Jupiter and Saturn, including Europa, Callisto, Ganymede and Enceladus.
5. Planets Around Distant Stars
This lesson will describe how extrasolar planets can be found and if any have been found. Methods like Doppler shifts, microlensing, and transits will be defined.
6. Stanley Miller: Theory, Experiment & Apparatus
How did life originate on Earth? We may never have a complete and definite answer to that question, but in 1953, chemist Stanley Miller conducted a famous experiment that would show how the early Earth could have produced the chemicals of life.
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Other chapters within the DSST Astronomy: Study Guide & Test Prep course
- History of Astronomy Basics
- How Scientists Think and Work
- Overview of Light in Astronomy
- Overview of Newton's Laws in Astronomy
- The Orbits of Celestial Bodies
- The Earth, Sky, and Moon Basics
- The Moon: Formation & Phases
- The Sun's Structure & Components
- The Solar System: Layout, Formation & Dating
- Characteristics of Our Solar System's Planets
- Small Celestial Bodies & Satellites in Our Solar System
- Measurement of Star Qualities
- Star Types and Significance
- The Birth and Life of Stars
- Basics of Star Death
- Neutron Stars & Black Holes
- The Milky Way Galaxy
- Galaxies: Properties & Characteristics
- The Universe: Key Concepts & Theories
- Celestial Navigation & Timekeeping
- Overview of Telescopes
- DSST Informational Resources
- DSST Astronomy Flashcards