September Night Sky
Tonight’s Sky: September 2015
Your guide to constellations, deep-sky objects, planets and events, Tonight’s Sky, Highlights of the September Sky
September Evening Planets
After nightfall, catch Saturn in the southwestern sky. Use a telescope to get a better view of the ringed planet before it disappears beneath the horizon.
September Constellations and Deep-Sky Objects
September nights feature the “wet quarter” of the sky. Two neighboring constellations bear ancient references to water.
Aquarius is one of the oldest constellations, recognized even by early civilizations. In ancient mythologies, Aquarius is the god of the waters. Look for the Water Jar, a group of stars
shaped like a Y.
A rich, compact cluster of stars can be seen in Aquarius.
Known as M2, it contains about 150,000 stars located about 37,500 light-years away.
Binoculars present it well, but a small telescope reveals much more detail in the cluster’s compact center.
Nearby lies the great constellation Capricornus. Known in mythology as the Water Goat, it represents a creature that fed and watered the infant Zeus, ruler of the Greek gods.
Algedi is the brightest star in Capricornus. It’s visible in binoculars as an elongated star.
This odd shape is due to ...