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9) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 7The Celestial Sphere
Pub. Date
2024.
Language
English
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.
11) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 21The Colors of Stars
Pub. Date
2024.
Language
English
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.
18) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 23Modern Telescopes
Pub. Date
2024.
Language
English
Description
Today's telescopes are designed to provide huge light-gathering mirrors at relatively low cost. The mirrors focus light from distant objects onto sensitive electronic detectors that are far more efficient than traditional photographic film.
Pub. Date
2024.
Language
English
Description
Though less massive than Jupiter and Saturn, Uranus and Neptune are similar in that they consist mostly of hydrogen and helium. Both have bizarre magnetic fields that are highly tilted relative to the planet's rotation axis and offset from the planet's center.
20) Understanding the Universe: An Introduction to Astronomy, 2nd Edition: Episode 28Mercury and Venus
Pub. Date
2024.
Language
English
Description
Though broadly similar to Earth, Mercury and Venus differ in detail. Mercury has a negligible atmosphere and is heavily cratered. Venus has an incredibly thick atmosphere and suffers from an extreme greenhouse effect that makes it intensely hot.
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