How many moons can you see? The best answer is five: four orbiting
Jupiter and
Luna orbiting Earth. This multi-moon picture was possible because
Earth's Moon moved directly
in front of
Jupiter last week. The
featured image is a series of exposures near alignment taken from
Westchester,
New York,
USA. The sunlit crescent of Earth's Moon, on the lower left, is overexposed, while the Moon's night side, on the upper right, is faintly illuminated by
Earthshine. Lined up
nearly vertically above our Moon, listed from bottom to top, are Jupiter's bright
Galilean satellites: Ganymede, Io, Callisto, and Europa.
Callisto,
Ganymede, and
Io are larger than Earth's Moon, while
Europa is only slightly smaller. NASA's robotic spacecraft
Juno is currently orbiting
Jupiter and has made close passes near three of these moons.