Free online courseAstronomy
Duration of the online course: 2 hours and 56 minutes
4.73
(52)
Explore the mysteries of the universe with a free online course on the Big Bang, cosmic radiation, Hubble's Law, and more. Perfect for astronomy enthusiasts!
Course Description
Welcome to the captivating world of astronomy through the course, "Astronomy." Spanning a concise duration of 2 hours and 56 minutes, this course has garnered an impressive average rating of 5 out of 5 stars, reflecting widespread appreciation and acclaim from learners.
Under the enlightening guidance of the instructor, you will embark on an in-depth exploration of the fascinating universe, starting with the monumental event that shaped it all—the Big Bang. This course belongs to the 'Others' category and delves deep into the realm of Astronomy, providing an extensive understanding of the genesis and evolution of the cosmos.
The journey begins with an introduction to the Big Bang theory, setting the stage for a series of insights into pivotal astronomical phenomena. You will unravel the mysteries of the expanding universe with an insightful explanation of Hubble's Law, followed by a closer look at the conditions of the hot, early universe. The course further delves into how radiation was stretched during the early moments following the Big Bang and examines the implications of cosmic background radiation.
As you progress, you will learn about the significant contributions of the COBE satellite in understanding the Cosmic Microwave Background (CMB) and explore how Earth's motion affects our perception of this background radiation. A captivating session on the relationship between energy, mass (E=mc^2), and the temperature in the early universe will deepen your understanding of complex astrophysical concepts.
The course does not shy away from tackling profound questions such as Olbers' Paradox and the enigmatic elements of the universe’s infinity. Einstein's contribution is highlighted by the discussion of his "Biggest Blunder," leading into the cosmological constant and the central query of whether the universe has a center.
The narrative then turns inquisitive with an exploration of the empirical evidence supporting the Big Bang theory, followed by a detailed examination of the Plank Era and the Grand Unification Era. The intriguing inflationary period and subsequent eras, like the Quark Era and the Baryogenesis, bring clarity to the formation and transformation phases of the universe.
Further sessions elegantly cover the Hadron, Lepton, and Nucleosynthesis periods, elucidating how mass and the first elements came into existence. The moment of decoupling or recombination signals the universe's transparency, giving way to the formation of the first stars and galaxies during the Radiation Era, often referred to as the "Dark Ages."
The course continues with an enlightening discussion on re-ionization and the processes that led to the formation of stars and galaxies, such as fluctuations and Jeans Length. Finally, you will contemplate the curvature of the universe and the crucial role of entropy in the Big Bang theory.
By the end of the course, you will possess a cohesive understanding of the universe's inception and its ongoing dynamics. Whether you are a novice astronomy enthusiast or a seasoned stargazer, 'Astronomy' offers a comprehensive, engaging, and profoundly educational experience that will leave you in awe of the cosmos.
Conteúdo do Curso
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Video class: Astronomy: The Big Bang (1 of 30) Introduction
0h02m
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Exercise: _What is the Big Bang?
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Video class: Astronomy: The Big Bang (2 of 30) Hubble Law and The Expanding Universe
0h07m
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Video class: Astronomy: The Big Bang (3 of 30) The Hot Early Universe
0h03m
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Exercise: _What did Ralph Alford and Robert Herman realize about the consistency of the universe?
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Video class: Astronomy: The Big Bang (5 of 30) Cosmic Background Radiation
0h07m
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Video class: Astronomy: The Big Bang (4 of 30) Radiation Stretched
0h03m
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Video class: Astronomy: The Big Bang (6 of 30) The Cobe Satellite and the CMB
0h08m
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Video class: Astronomy: The Big Bang (7 of 30) Cosmic Background Radiation and Earth's Motion
0h04m
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Exercise: _What did the study of the cosmic background radiation reveal about the universe?
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Video class: Astronomy: The Big Bang (8 of 30) E=mc^2 and the Temperature of the Early Universe
0h07m
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Video class: Astronomy: The Big Bang (9 of 30) Olbers' Paradox: Is the Universe Infinite?
0h05m
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Exercise: _According to Olbers paradox, if the universe was infinite, what would happen to the night sky?
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Video class: Astronomy: The Big Bang (10 of 30) Einstein's Biggest "Blunder"
0h06m
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Video class: Astronomy: The Big Bang (11 of 30) The Cosmological Constant "Is there a Center to the Universe?"
0h03m
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Exercise: _What is the cosmological principle?
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Video class: Astronomy: The Big Bang (12 of 30) How Do We Know the Big Bang Happened?"
0h06m
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Video class: Astronomy: The Big Bang (13 of 30) Plank Era: The Beginning of Time
0h07m
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Exercise: _What is the Planck time?
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Video class: Astronomy: The Big Bang (14 of 30) GUT: Grand Unification Era (time = 10^-43 sec)
0h06m
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Video class: Astronomy: The Big Bang (15 of 30) Electroweak Era (time = 10^-12 sec)
0h02m
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Exercise: _What is the Electroweak era in the universe?
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Video class: Astronomy: The Big Bang (16 of 30) The Inflationary Period (time = 10^-35 to 10^-12 sec)
0h11m
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Video class: Astronomy: The Big Bang (17 of 30) The Quark Era (time = 10^-15 to 10^-6 sec)
0h02m
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Exercise: _During the cork era, the electroweak force separated into which two distinct forces?
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Video class: Astronomy: The Big Bang (18 of 30) What is Baryogenesis?
0h06m
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Video class: Astronomy: The Big Bang (19 of 30) The Hadron Era (time = 1s After The Creation of the Universe)
0h03m
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Exercise: _What is the estimated temperature range during the hadron era?
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Video class: Astronomy: The Big Bang (20 of 30) The Lepton Era (time = 1s to 3min) We Have Mass!
0h04m
This free course includes:
2 hours and 56 minutes of online video course
Exercises to train your knowledge
Certificate of course completion
100% free, from content to certificate
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