Here's a composite of two images of the Jan. 21, 2013, Jupiter-Moon conjunction, as seen from Bowie, Md. An exposed for the Moon is inset onto an image exposed to reveal Jupiter's moons. The planet, overexposed, is marked by the spikes; the visible moons are Ganymede (upper left of Jupiter), and Io and Callisto (lower right). The star between Callisto and the Moon is 50 Tau. Details: Canon T3i, 250 and 300 mm focal length, f/5.6, tripod. Background: 0.5 sec & ISO 800; Moon: 1/200 sec, ISO 100
320 days ago via site
Four #moons in one picture: One of Earth, and three of #Jupiter, from top left to bottom right: #Io, (Jupiter), #Ganymede, #Callisto. Panasonic FZ45, f/4.2, f=70.3mm (391mm equiv.), ISO 80, 2s.