Here you can find items and information about two main topics:

astronomy and photography

I am an astrophysicist, since 2014 i also do photography, both with an iPhone and with a sony mirrorless camera.

A selection of iPhone photos from my Flickr account

Artist impression of the "heartbeat" of two black-hole binaries in our galaxy: GRS 1915+105 and IGR J17091-3624 (Credit: NASA/Goddard Space Flight Center/CI Lab. Data: Altamirano & Belloni (2011, The Astrophysical Journal, 747, L4).