The Trial Blending Space is for evaluation purposes only.
This comprehensive course contains 30 sections with 185 self-grading lessons, including final assessments. The first section is an introduction, without a final assessment, therefore both sections one and two are available to try for free.
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An introductory tour into science and the universe.
This is the final assessment for Observing the Sky: The Birth of Astronomy. (Available when you subscribe.)
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The full course includes all 185 lessons, including 30 Final Assessments with Instructor Answer Keys.
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The Blending Space features:
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3.2 Newton’s Great Synthesis3.3 Newton’s Universal Law of Gravitation3.4 Orbits in the Solar System3.5 Motions of Satellites and Spacecraft3.6 Gravity with More Than Two BodiesFinal Assessment
4.1 Earth and Sky4.2 The Seasons4.3 Keeping Time4.4 The Calendar4.5 Phases and Motions of the Moon4.6 Ocean Tides and the Moon4.7 Eclipses of the Sun and MoonFinal Assessment
5.1 The Behavior of Light5.2 The Electromagnetic Spectrum5.3 Spectroscopy in Astronomy5.4 The Structure of the Atom5.5 Formation of Spectral Lines5.6 The Doppler EffectFinal Assessment
6.1 Telescopes6.2 Telescopes Today6.3 Visible-Light Detectors and Instruments6.4 Radio Telescopes6.5 Observations outside Earth’s Atmosphere6.6 The Future of Large TelescopesFinal Assessment
7.1 Overview of Our Planetary System7.2 Composition and Structure of Planets7.3 Dating Planetary Surfaces7.4 Origin of the Solar SystemFinal Assessment
8.1 The Global Perspective8.2 Earth’s Crust8.3 Earth’s Atmosphere8.4 Life, Chemical Evolution, and Climate Change8.5 Cosmic Influences on the Evolution of EarthFinal Assessment
9.1 General Properties of the Moon9.2 The Lunar Surface9.3 Impact Craters9.4 The Origin of the Moon9.5 MercuryFinal Assessment
10.1 The Nearest Planets: An Overview10.2 The Geology of Venus10.3 The Massive Atmosphere of Venus10.4 The Geology of Mars10.5 Water and Life on Mars10.6 Divergent Planetary EvolutionFinal Assessment
11.1 Exploring the Outer Planets11.2 The Giant Planets11.3 Atmospheres of the Giant PlanetsFinal Assessment
12.1 Ring and Moon Systems Introduced12.2 The Galilean Moons of Jupiter12.3 Titan and Triton12.4 Pluto and Charon12.5 Planetary RingsFinal Assessment
13.1 Asteroids13.2 Asteroids and Planetary Defense13.3 The “Long-Haired” Comets13.4 The Origin and Fate of Comets and Related ObjectsFinal Assessment
14.1 Meteors14.2 Meteorites: Stones from Heaven14.3 Formation of the Solar System14.4 Comparison with Other Planetary Systems14.5 Planetary EvolutionFinal Assessment
15.1 The Structure and Composition of the Sun15.2 The Solar Cycle15.3 Solar Activity above the Photosphere15.4 Space WeatherFinal Assessment
16.1 Sources of Sunshine: Thermal and Gravitational Energy16.2 Mass, Energy, and the Theory of Relativity16.3 The Solar Interior: Theory16.4 The Solar Interior: ObservationsFinal Assessment
17.1 The Brightness of Stars17.2 Colors of Stars17.3 The Spectra of Stars (and Brown Dwarfs)17.4 Using Spectra to Measure Stellar Radius, Composition, and MotionFinal Assessment
18.1 A Stellar Census18.2 Measuring Stellar Masses18.3 Diameters of Stars18.4 The H–R DiagramFinal Assessment
19.1 Fundamental Units of Distance19.2 Surveying the Stars19.3 Variable Stars: One Key to Cosmic Distances19.4 The H–R Diagram and Cosmic DistancesFinal Assessment
20.1 The Interstellar Medium20.2 Interstellar Gas20.3 Cosmic Dust20.4 Cosmic Rays20.5 The Life Cycle of Cosmic Material20.6 Interstellar Matter around the SunFinal Assessment
21.1 Star Formation21.2 The H–R Diagram and the Study of Stellar Evolution21.3 Evidence That Planets Form around Other Stars21.4 Planets beyond the Solar System: Search and Discovery21.5 Exoplanets Everywhere: What We Are Learning21.6 New Perspectives on Planet FormationFinal Assessment
22.1 Evolution from the Main Sequence to Red Giants22.2 Star Clusters22.3 Checking Out the Theory22.4 Further Evolution of Stars22.5 The Evolution of More Massive StarsFinal Assessment
23.1 The Death of Low-Mass Stars23.2 Evolution of Massive Stars: An Explosive Finish23.3 Supernova Observations23.4 Pulsars and the Discovery of Neutron Stars23.5 The Evolution of Binary Star Systems23.6 The Mystery of the Gamma-Ray BurstsFinal Assessment
24.1 Introducing General Relativity24.2 Spacetime and Gravity24.3 Tests of General Relativity24.4 Time in General Relativity24.5 Black Holes24.6 Evidence for Black Holes24.7 Gravitational Wave AstronomyFinal Assessment
25.1 The Architecture of the Galaxy25.2 Spiral Structure25.3 The Mass of the Galaxy25.4 The Center of the Galaxy25.5 Stellar Populations in the Galaxy25.6 The Formation of the GalaxyFinal Assessment
26.1 The Discovery of Galaxies26.2 Types of Galaxies26.3 Properties of Galaxies26.4 The Extragalactic Distance Scale26.5 The Expanding UniverseFinal Assessment
27.1 Quasars27.2 Supermassive Black Holes: What Quasars Really Are27.3 Quasars as Probes of Evolution in the UniverseFinal Assessment
28.1 Observations of Distant Galaxies28.2 Galaxy Mergers and Active Galactic Nuclei28.3 The Distribution of Galaxies in Space28.4 The Challenge of Dark Matter28.5 The Formation and Evolution of Galaxies and Structure in the UniverseFinal Assessment
29.1 The Age of the Universe29.2 A Model of the Universe29.3 The Beginning of the Universe29.4 The Cosmic Microwave Background29.5 What Is the Universe Really Made Of?29.6 The Inflationary Universe29.7 The Anthropic PrincipleFinal Assessment
30.1 The Cosmic Context for Life30.2 Astrobiology30.3 Searching for Life beyond Earth30.4 The Search for Extraterrestrial IntelligenceFinal Assessment
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