Transit of Venus seen from the small telescope of a sidewalk astronomer (San Francisco)
The image of the sun is inverted by the telescope. The black dot is planet Venus transiting in front of the sun. The smaller spots are sunspots.
View my other photos of the Transit of Venus. This is a rare astronomical event: The next time this will happen is in year 2117.
The sky looks black through the telescope because of the very dark filter used to attenuate the brightness of the sun.
For more information about the Transit of Venus, read en.wikipedia.org/wiki/Transit_of_Venus.