Planetary Nebulae

The expulsion of gaseous materials from some aging stars form planetary nebulae. Here are some illustrated examples. Continue reading

The North Pole Group Constellations

Examine the shape and composition of the constellations immediately surrounding the celestial North Pole. Continue reading

Assorted Nebulae

There are many types of nebulae, including emission, diffuse, reflection, planetary, and dark. Learn about them with these illustrated examples. Continue reading