What is Earthshine?
Earthshine refers to the sunlight falling upon the Moon after being reflected from Earth. It is often strong enough to make the night side of the Moon faintly luminous. The Earth’s disc would also wax and wane from new Earth to full Earth regularly as seen from the Moon and the degree of Earthshine would be dependent on the phase of the Earth as seen from the Moon. For example, Earthshine would be maximum when a full earth is visible from the Moon.
What are lunar haloes?
Lunar haloes are beautiful luminous rings around the lunar disc. They are due to the ice crystals present in “cirrostratus clouds” in the Earth’s upper atmosphere which diffuse the moonlight resulting in the lunar haloes.