Taken from the DSCOVR satellite (Deep Space Climate Observatory), this captivating image shows the moon transiting across the Earth, revealing the far (or "dark") side of the moon.
DSCOVR is sat at the L1 Lagrange point approximately a million miles from Earth, inside its orbit at the precise point where the Earth's gravity counterbalances the Sun's sufficiently that the satellite can orbit at the same angular velocity as the Earth itself, relative to the Sun.
This position allows it to capture the Moon's far side in full sunlight. The transit also shows off just how dark the moon is, relative to the Earth (approximately 1/3rd of the albedo).
Normally DSCOVR monitors solar wind for NASA and the US National Oceanic and Atmospheric Administration (NOAA).