Video: The dance of the Earth and Moon as seen by DSCOVR

NOAA’s DSCOVR (Deep Space Climate Observatory) spacecraft  has a clear view of the hemisphere of the Earth facing the Sun. This can give it a great view of the Moon and Earth together. In the video below, I concantenated three videos produced by the EPIC (Earth Polychromatic Camera)  on DSCOVR, two of which show the Moon crossing the face of the Earth and one showing the Earth eclipsing the Moon.

The reason that the DSCOVR spacecraft can obtain such views is because it sits a million miles away from Earth on the L1 Lagrange point (see diagram below). L1 is one of five Lagrange spots where an object can remain fixed relative to the earth due to the counterbalancing pulls of the Sun and Earth’s gravitational forces and the inertia of the object.

l1_DSCOVR_diagram[1]Diagram of DSCOVR  at the L1 point. (Credits NOAA).

Here is a new video that shows a time lapse of one year of DSCOVR images of Earth: