Walter Lewin Biography, Nationality, Accomplishment, Career path and Net Worth

Walter Hendrik Gustav Lewin is a Dutch astrophysicist and retired professor of physics at the Massachusetts Institute of Technology. Lewin earned his doctorate in nuclear physics in 1965 at the Delft University of Technology and was a member of MIT’s physics faculty for 43 years beginning in 1966 until his retirement in 2009.

Profile Summary

Full Name/Popular Name Walter Hendrik Gustav Lewin/Walter Lewin
Gender Male
Date of Birth January 29, 1936
Nationality Dutch
Occupation Astrophysicist and Retired Professor of Physics
Net Worth $1-8 million

More To Know About Walter Lewin

Lewin is a astrophysicist and retired professor of physics who have contributed quite a lot to the said profession. He was one of the first to in the discovery of a rotating neutron star through all-sky balloon surveys and research in X-ray detection in investigations through satellites and observatories. Lewin has received awards for teaching and is known for his lectures on physics and their publication online via YouTube, MIT OpenCourseWare and edX.

In December 2014, MIT revoked Lewin’s Professor Emeritus title after an MIT investigation determined that Lewin had violated university policy by sexually harassing an online student in an online MITx course he taught in fall 2013.

Early Life and Education of Walter Lewin

Walter Lewin was born to Walter Simon Lewin and Pieternella Johanna van der Tang in 1936 in The Hague, Netherlands. He was a child when Nazi Germany occupied The Netherlands during World War II. His paternal grandparents Gustav and Emma Lewin, who were Jewish, died in Auschwitz in 1942. To protect the family, Lewin’s father — who was Jewish, unlike his mother — decided one day to simply leave without telling anyone. His mother was left to raise the children and run a small school she and her husband had started together. After the war ended, his father resurfaced; Lewin describes having a “more or less normal childhood.” His parents continued running the school, which he says strongly influenced his love of teaching.

Walter Lewin Biography Age Nationality Family Career Choices And Net Worth
Walter Lewin

Career Path of Walter Lewin

Walter once taught high school physics while studying for his PhD, then he went to Massachusetts Institute of Technology in January 1966 as a post-doctoral associate and was appointed an assistant professor. He was promoted to associate professor of physics in 1968 and to full professor in 1974.

At MIT, Lewin joined the X-ray astronomy group and conducted all-sky balloon surveys with George W. Clark. Through the late seventies, there were about twenty successful balloon flights. These balloon surveys led to the discovery of five new X-ray sources, whose spectra were very different from the X-ray sources discovered during rocket observations. The X-ray flux of these sources was variable. Among them was GX 1+4 whose X-ray flux appeared to be periodic with a period of about 2.4 minutes. This was the first discovery of a slowly rotating neutron star. In October 1967 when Scorpius X-1 was observed, an X-ray flare was detected. The flux went up by a factor of about 4 in ten minutes after which it declined again. This was the first detection of X-ray variability observed during the observations. The rockets used by other researchers could not have discovered that the X-ray sources varied on such short time scales because they were only up for several minutes, whereas the balloons could be in the air for many hours.

Walter Lewin Net Worth

Walter Lewin was born on January 29, 1936, and his birthplace is The Hague. This famous Dutch astrophysicist has a net worth which falls within $1-8 million.


In his search for millisecond X-ray pulsations from low-mass X-ray binaries, in 1984–85 Lewin made guest observations with the European observatory EXOSAT in collaboration with colleagues from Amsterdam and Garching, Germany. This led to the unexpected discovery of intensity-dependent quasi-periodic oscillations (QPO) in the X-ray flux of GX 5-1. During 1989 to 1992, using the Japanese observatory “Ginga”, Lewin and his co-workers studied the relation between the X-ray spectral state and the radio brightness of several bright low-mass X-ray binaries.

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