Editing Interplanetary medium (section)

==Observable phenomena of the interplanetary medium==
[[File:Night Sky from Hawai‘i and Chile (iotw2225c).jpg|thumb|upright=2|The [[interplanetary dust cloud]] illuminated and visible as [[zodiacal light]], with its parts the ''false dawn'',<ref>{{cite web|title=False Dawn|url=http://www.eso.org/public/images/potw1707a/|website=www.eso.org|access-date=14 February 2017}}</ref> ''[[gegenschein]]'' and the rest of its band, which is visually crossed by the [[Milky Way]], in this composite image of the night sky above the northern and southern hemisphere]]
The interplanetary medium is responsible for several optical phenomena visible from Earth. [[Zodiacal light]] is a broad band of faint light sometimes seen after sunset and before sunrise, stretched along the [[ecliptic]] and appearing brightest near the horizon. This glow is caused by sunlight [[light scattering by particles|scattered]] by [[interplanetary dust cloud|dust particles]] in the interplanetary medium between Earth and the Sun.

A similar phenomenon centered at the [[antisolar point]], [[gegenschein]] is visible in a naturally dark, moonless [[night sky]]. Much fainter than zodiacal light, this effect is caused by sunlight [[backscatter]]ed by [[cosmic dust|dust particles]] beyond Earth's orbit.