Earthshine


This video takes us around the Moon and shows how it is illuminated not only by the brilliant light of the Sun but also by light reflected from the Earth. The trip starts on the side facing away from Earth where part of the surface is brightly illuminated by the Sun but the rest is totally dark. Moving around the Moon, the Earth rises, and its reflected bluish light illuminates the Moon’s surface. This dull glow is the earthshine. (You can clearly see it from Earth when the Moon appears as a crescent in the evening or morning sky.) When the Sun emerges from behind the Moon, the brilliant crescent is seen, but the earthshine is still faintly visible.

Video Credit: ESO

HH 34


hh34HH 34 is a Herbig–Haro object containing a protostar near the Orion Nebula. Herbig–Haro objects are small patches of nebulosity associated with newly born stars. They’re formed when narrow jets of gas ejected by those stars at several hundred km/s collide with nearby clouds of gas and dust.

Image Credit: ESO