Delta Cephei: Astronomy’s Royal Gem Fit for a King

The variable star Delta Cephei lies in the constellation Cepheus and is a one of the most important and historical stars in astronomy. Delta Cep makes the basis for all Cepheids, which Henrietta Leavitt discoveed that their luminosities are directly related to their periods of pulsation. This led to our being able to measure greater distances starting when Edwin Hubble uncovered the distance to the Andromeda Galaxy after finding a Cepheid in the galaxy.

NGC 7009: The Saturn Nebula

The Saturn Nebula, also known as Caldwell 55, is a planetary nebula viewable in the northern night sky in autumn in constellation Aquarius. Even though dim nebulas like NGC 7009 can be challenging to view in suburban backyards because of light pollution, astronomers should not loose heart. This nebula is pretty easy to spot on a moonless night with a smaller telescope. It will appear light-blue or green and as a small smudge in the scope.