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Publisher
The Great Courses
Pub. Date
2024.
Description
Is the Universe a finite bubble in a higher-dimensional space? Or, is it infinite regardless of whether it's imbedded in extra dimensions? Will it expand forever or ultimately recollapse? If it does expand forever, how will this limitless future unfold?
Publisher
The Great Courses
Pub. Date
2024.
Description
This lecture explores observational tests of general relativity. Astronomers exploit its effects by searching for distant objects that are gravitationally lensed, which occurs when an object's light is bent and focused by foreground masses such as galaxy clusters.
4) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 43Stars-Distant Suns
Publisher
The Great Courses
Pub. Date
2024.
Description
A voyage to another star would require exact information on distances and properties of the stars. This lecture shows how astronomers measure the distance to nearby stars and how they determine their surface temperatures, which are the basis for stellar classification.
Publisher
The Great Courses
Pub. Date
2024.
Description
An accidental discovery in 1965 overturned the steady-state theory of the Universe, an alternative to the Big Bang theory. The detection of a uniform microwave glow in all directions was exactly what was expected if the Universe was hot and dense long ago.
Publisher
The Great Courses
Pub. Date
2024.
Description
This lecture starts the study of the Universe as a whole—or cosmology. A key finding made by Edwin Hubble in 1929 was that the spectra of distant galaxies are redshifted more than those of nearby galaxies, suggesting that the Universe is expanding.
Publisher
The Great Courses
Pub. Date
2024.
Description
In 96 richly illustrated half-hour lectures you will survey the main concepts, methods, and discoveries in astronomy—from the constellations drawn by the ancients, to the latest reports from planetary probes in our Solar System and the most recent images offered by telescopes probing the farthest frontiers of space and time.
Publisher
The Great Courses
Pub. Date
2024.
Description
Beyond Mars lie the four gas giants: Jupiter, Saturn, Uranus, and Neptune. Jupiter is the Solar System's largest planet by far. Its moons include Io, which is volcanically active, and Europa, which may have an ocean of liquid water below its frozen surface.
15) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 21The Colors of Stars
Publisher
The Great Courses
Pub. Date
2024.
Description
The surface temperature of a star determines its apparent color. The hottest stars are bluish in color, and the coldest stars are reddish; stars at intermediate temperatures appear white. The Sun is a white star.
Publisher
The Great Courses
Pub. Date
2024.
Description
According to legend, Newton saw a falling apple and realized that the force that pulled it toward Earth also pulled on the Moon, keeping it in its orbit. Building on the work of Kepler and Galileo, he revolutionized astronomy with his law of universal gravitation and laws of motion.
Publisher
The Great Courses
Pub. Date
2024.
Description
The course ends on a philosophical note, with reflections on intelligent life in the cosmos and of our place in its grand structure. Perhaps the most astonishing thing about the Universe is that we are able to contemplate and understand it through systematic studies.
20) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 7The Celestial Sphere
Publisher
The Great Courses
Pub. Date
2024.
Description
As Earth rotates on its axis and orbits the Sun, the night sky changes over a 24-hour period, as well as throughout the year. This lecture explains how to locate celestial bodies and why the sky appears different from place to place.
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