Planetary Science and Cosmochemistry

Andrew H. Knoll

Andrew H. Knoll

Fisher Professor of Natural History and Professor of Earth and Planetary Sciences

Andy Knoll is the Fisher Professor of Natural History at Harvard University. He received his B.A. in Geology from Lehigh University in 1973 and his Ph.D., also in Geology, from Harvard in 1977.... Read more about Andrew H. Knoll

Harvard University Botanical Museum
26 Oxford St.
Cambridge MA 02138

Office location: Botanical Museum Room 50
p: 617-495-9306, f: 617-495-5667
Photo of Jeremy Bloxham

Jeremy Bloxham

Mallinckrodt Professor of Geophysics

Planetary magnetic fields, dynamo theory, structure and dynamics of the earth's core and lower mantle, inverse theory, mathematical geophysics.

20 Oxford St.
Cambridge, MA 02138

Office Location:Geomuseum 201
p: 617-496-0289 f: 617-496-1240

Michael Volk

Post-doctoral Fellow

Originally from Germany, I finished my doctorate at the Ludwig Maximilians University in Munich in 2016. I am interested in how magnetic fields evolve with time, especially in the early solar system during planet formation. So far, my research is focused on the fundamentals of remanence acquisition and can be broadly divided into three main themes. (1) the magnetic properties of materials associated with meteorites, (2) the effect of high pressure on magnetic properties of minerals and (3) the rock magnetism of ultra-fine particles. By understanding these fundamental recording processes, we will be able to have a more robust interpretation of the magnetic signals that are retained in meteorites. At Harvard, I will be able to combine my interests and work on the fascinating and complicated paleomagnetic record of Mars.

2018 Aug 30

Special Seminar with Marzia Parisi: The gravity fields of gas giants and their icy moons from Juno and Cassini

12:00pm to 2:15pm


McKinstry Room, Geological Museum 204

This talk provides an overview of the scientific discoveries that can be made through gravity experiments onboard interplanetary missions. One application of radio science to the field of planetary geodesy is the determination of the gravitational potential of planets and satellites, by means of precise Doppler tracking of an orbiter. Gravity science investigations can be used to study the complex interiors of gas giants, for a better understanding of the origin and formation of our Solar System. The Juno spacecraft entered a 53-day orbit around Jupiter on July 5, 2016. Doppler...

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Dr. Ursula B. Marvin 1921 - 2018

February 20, 2018

We are sad to note the recent passing of our colleague, Ursula B. Marvin.  Dr. Marvin recieved her PhD in geology from Harvard in 1969 and worked in our department for many years researching the mineralogy of meteorites and lunar samples.

Notably, decades before receiving her PhD, she was the first female research assistant in Harvard's Geology Department.  Quoting from a Smithsonian web page: "Geology lit a fire. I fell in love with it the first week." Considered an unacceptable profession for women, when Dr. Marvin approached her (Tufts) geology professor...

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Li Zeng

Li Zeng

Associate of the Department
Jacobsen Group

Dr. Li Zeng is a  former Simons Postdoctoral Fellow in the Simons Collaboration on the Origins of Life, currently working with Professor Jacobsen in the department of Earth and Planetary Sciences, Harvard University. He has his Ph.D. & M.A. in Astronomy and Astrophysics from Harvard University and his B.S. in Physics from MIT.  His current research focus is on Uncovering the formation, evolution, interior structure, and chemistry of exoplanets, in particular, Earth-like planets. You can learn more about Li’s research at

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Earth-sized planets around Trappist-1

February 24, 2017

The discovery of Earth-sized planets around Trappist-1 has been making waves, and we’re proud to say that the interior structures of those seven newly discovered planets were calculated based on the model developed here at EPS by the Jacobsen group. Attached is the paper from Nature that cites their work; specifically, figure 2 is plotted based on the composition model developed by Professor Stein Jacobsen, Professor Dimitar Sasselov of the Center for Astrophysics, and Dr. Li Zeng, Simons Foundation postdoc. They would like to thank the entire EPS community for their support, as...

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2015 Sep 18

Planetary Science Journal Club

Repeats on the third Friday until Thu Dec 31 2015 .
12:00pm to 1:00pm

12:00pm to 1:00pm
12:00pm to 1:00pm
12:00pm to 1:00pm


GM 105

Bi-weekly joint meeting with the CfA and EPS to review recent topics of research interest in Planetary Science.

EPS Contact: Kimee Moore (

CfA Contact: Laura Shaefer (

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