Joel D. Hartman
Princeton University Department of Astrophysical Sciences

I am an Associate Research Scholar at the Princeton University Department of Astrophysical Sciences, working on the HATNet and HATSouth projects, which are surveys for transiting planets that orbit bright stars.

Image of M37
The open cluster M37 as seen with the 300 megapixel Megacam camera on the 6.5-m MMT in Arizona. The stars in this cluster are about 550 million years old. That means they formed around the same time that the Cambrian explosion was happening on Earth, not long after the first complex multicellular organisms (our very distant ancestors) started appearing on our planet. Nonetheless, that's pretty young for Sun-like stars considering that the middle-aged Sun is about 8 times older than that. This cluster is located approximately 5000 light years away from us toward the constellation Auriga, more or less in the opposite direction from the Galactic center. Clicking on the image loads a higher resolution version.

Last Modified September 1, 2011