Watch: NASA Captures Earth and Moon Moving Across Sun Together for First Time

NASA’s Solar Dynamics Observatory captured this image of Earth and the moon transiting the sun together on Sept. 13, 2015. The edge of Earth, visible near the top of the frame, appears fuzzy because Earth’s atmosphere blocks different amounts of light at different altitudes. On the left, the moon’s edge is perfectly crisp, because it has no atmosphere. NASA/SDO

The National Aeronautics and Space Administration (NASA) has posted footage online filmed by its Solar Dynamics Observatory that captures the Earth and moon moving across the sun together. It's the first time such an event has been captured on video or film.

"On Sept. 13, 2015, as NASA's Solar Dynamics Observatory, or SDO, kept up its constant watch on the sun, its view was photobombed not once, but twice. Just as the moon came into SDO's field of view on a path to cross the sun, Earth entered the picture, blocking SDO's view completely," writes Sarah Frazier, a NASA communications fellow, on the organization's website, Sarah Frazier. "When SDO's view of the sun emerged from Earth's shadow, the moon was just completing its journey across the sun's face."

NASA explains that even though they often capture Earth eclipses and lunar transits of the sun each year, it is the first time that both have been recorded at the same time.

"SDO's orbit usually gives us unobstructed views of the sun," Frazier writes. "but Earth's revolution around the sun means that SDO's orbit passes behind Earth twice each year, for two to three weeks at a time. During these phases, Earth blocks SDO's view of the sun for anywhere from a few minutes to over an hour once each day."