Black Hole TOM 2.0
Click the image for a main page with current list of targets of interest. (Image courtesy of NASA/ESA/Gaia/DPAC)
"I have one request, which is this, that the observations shall be made known each year. Observations buried in a desk are no observations. Should they be entrusted to me for reduction, or even for publication, I will undertake it with joy and thanks, and will also answer all questions with care and with the greatest pleasure.”
Friedrich Wilhelm August Argelander, 1844
“An Appeal to the Friends of Astronomy” in Schumacher's Astronomical Year Book
translated by Annie Jump Cannon, Popular Astronomy, 1912