How did the Solar System form? In this lecture I review the clues for
the formation of the solar system in the present-day dynamics (orbital
and rotation motions) and compositions of the planets and small bodies.
I then describe the standard accretion model for solar system formation,
whereby grains condense out of the primordial solar nebula, grains
aggreg ... Show More
Nov 2007
Lecture 33: Battered Mercury
Mercury, innermost of the planets, is a hot, dead world that has been heavily battered by impacts. In this lecture I review the properties of Mercury, its orbit, rotation, surface, and interior structure. Recorded 2007 Nov 7 in 1000 McPherson Lab on the Columbus campus of The Ohi ... Show More
40m 38s
Nov 2007
Lecture 34: Venus Unveiled
Venus, the second planet from the Sun, is perpetually veiled behind opaque clouds of sulfuric acid droplets atop a hot, heavy, carbon dioxide atmosphere. In size and apparent composition, however, it is a near twin-sister of the Earth. Why is it do different? In this lecture I re ... Show More
41m 46s
Nov 2007
Lecture 35: The Deserts of Mars
Mars is a cold desert planet with a thin, dry carbon-dioxide atmosphere. The geology of Mars, however, shows signs of an active past, with hot-spot volcanism, and tantalizing signs of ancient water flows. While a cold, dead desert planet today, Mars' past may have been warmer and ... Show More
43m 45s
Jul 2019
Cosmic Queries – Summer School
<p>The sun is out, the weather is warm, and summer school is in session! Neil deGrasse Tyson, co-host Matt Kirshen, and astrophysicist Charles Liu answer fan-submitted questions on mathematics, the Big Bang, the laws of physics, neutrinos, relativity, Pluto, the smell of the Milk ... Show More
50m 4s
Mar 2025
Exoplanet Discovery, Dark Energy Evolution
SpaceTime Series 28 Episode 37
The Astronomy, Space and Science News Podcast
Exciting New Exoplanet Discovery, Evolving Dark Energy, and Insights into the Moon's Magnetic Field
In this episode of SpaceTime, we uncover the discovery of a potential new exoplanet, TOI 2818C, located ... Show More
27m 27s
Aug 2022
On Edwin Hubble’s "The Realm of the Nebulae"
Until the publication of Edwin Hubble’s 1936 book, The Realm of the Nebulae, astronomers believed that the Milky Way was the only galaxy in the universe. Hubble infinitely expanded our understanding of the cosmos and showed that what scientists thought was everything, was really ... Show More
38m 32s
Jan 2025
Charting the Architecture of the Universe & Human Life | Dr. Brian Keating
In this episode, my guest is Dr. Brian Keating, Ph.D., a cosmologist and professor of physics at the University of California, San Diego. We discuss the origins of the universe and how humans have used light and optics to understand where and how life on Earth emerged.
We explor ... Show More
3h 7m