Simon Lock

Simon J. Lock

Graduate Student

Principal Advisor: Sarah T. Stewart

Department of Earth and Planetary Sciences

Harvard University

(currently visiting UC Davis)



My research interests lie at the boundary between the fields of astrophysics, planetary science and geophysics. In particular, I am interested in the formation, structure and evolution of terrestrial and giant planets. More...

What's New?

Postdoctoral fellowship

I have just accepted the postition of the Planetary Science Option Podtdoc at Caltech, and will be moving to Pasadena in the fall.

Origin of the Moon

We have proposed a new model for the origin of the Moon: that the Moon formed inside the vaporized Earth. Our model can explain various observations of Earth and the Moon for the first time. Learn more...

UC Davis press release

Harvard Gazette

Journal article

Preprint on arXiv

A new astrophysical structure

We have discovered a completely new type of astrophysical object that we have named synestias. These are fascinating objects that have the potential to revolutionize our understanding of how planets form and evolve. Intrigued? Learn more...

UC Davis podcast

UC Davis press release

AGU press release

Journal article

ArXiv pre-print

University of California, Davis

My advisor, Sarah Stewart, has moved to UC Davis. As a result I will be spending time in the Earth and Planetary Sciences Department, UC Davis as a visiting student.


Contact Information


slock {at} fas {dot} harvard {dot} edu


(617) 520-4813 (Google Voice)

(617) 495-0498 (Harvard)


Department of Earth and Planetary Sciences
20 Oxford Street
MA 02138


All photos used on this site are either available under a creative commons license, or are the property of Brian Lock or NASA.