NGC 2477 (also known as Caldwell 71 or the Termite Hole Cluster) is an open cluster in the constellation Puppis. It contains about 300 stars, and was discovered by French Astronomer Abbé Lacaille in 1751. The cluster's age has been estimated at 700 million years. Although an open cluster, NGC 2477 is exceptionally crowded, bearing a close resemblance to a globular cluster, which makes the stars look tightly packed together like insects. Through a telescope, observers often see a faint nebula-like haze crowded with tiny, faint, uniform-magnitude stars, often described as a "spot" or "hole" in the background of brighter Milky Way stars.

NGC 2477 is a stunning cluster, almost as extensive in the sky as the full moon. It has been called "one of the top open clusters in the sky".

In the above image some emision nebulosity is visilbe... though with not much structure revealed.