Partial Lunar Eclipse 2019: What it is and when you can watch it in India

At a time when astronauts around the world are celebrating 50 years of Apollo 11 Luna landing, the moon will undergo a partial eclipse early morning on July 17. The spectacle can be seen when the moon passes partly but not completely through the earth’s dark umbral shadow.

Other than coinciding with the 50th anniversary of the Apollo mission, the eclipse is a little more special in India as it is falling at the same time as Guru Purnima — the first time after 149 years.
WHAT IS LUNAR ECLIPSE?
There are three basic types of lunar eclipses — Penumbral Lunar Eclipse, Partial Lunar Eclipse and Total Lunar Eclipse.
A lunar eclipse can only occur when a full moon passes through earth's shadow. The shadow is composed of two components, an outer shadow and an inner shadow. The outer or Penumbral shadow occurs when th earth blocks a part of the sun's rays from reaching the moon, while the inner or Umbral shadow is the region where the planet blocks all of the sun's rays.
A partial lunar eclipse occurs when the earth moves between the sun and the moon but they do not form a straight line. At such a time, a small part of the moon's surface is covered by the Umbra while the rest of the moon is covered by Penumbra. Read More

Article Source -> Business Standard