Greetings to all my supporters. Welcome to my Patreon page. Thank you for taking the time to visit.

Many of you know me from my contributions, thousands of answers that I offered on Quora, responding to questions that fall within my areas of expertise, mostly gravitation and physical cosmology. I continue writing several answers a day, and these are generally well received both by the Quora user community as a whole and also by professional colleagues.

Others know me from my work on the Pioneer Anomaly, once considered a great unsolved problem in physics. My current research topics include modified gravity theories, precision gravitational observations and gravitational lensing.

I collaborate with physicists from the Perimeter Institute for Theoretical Physics, the Jet Propulsion Laboratory and other notable institutions. I am also a member of the Maxima team of programmers and mathematicians who maintain the open-source computer algebra system Maxima.

My efforts resulted in several dozen papers, published in leading international journals (e.g., Physical Review, Astrophysical Journal, Monthly Notices of the Royal Astronomical Society, Living Reviews in Relativity, etc.) with noted co-authors.

Needless to say, this takes a lot of time and effort. I seek your support to be able to devote as much of my time as possible to these pursuits. If you found my Quora answers interesting and useful, if you believe as I do that my research is important and valuable, and if it is within your means to help, your contributions would be much appreciated.

I pledge to present a regular report for Patrons about my research and my science outreach activities. Longer-term goals include a popular science book, which I am regularly encouraged to write by enthusiastic Quora supporters.

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New patrons, please take a peek at Patreon's explanation of how they may charge value-add tax (VAT) based upon your country of residence. In accordance with how prices are shown here in Canada, I opted to let Patreon show the net charge, to which VAT may be added upon checkout.