The universe is full of
. Many of the galaxies visible in small telescopes are included in Charles Messier's
list of non-
. How many galaxies have we actually imaged? The
Hubble Deep Field
project can give you some idea.
Early in the twentieth century, Edwin Hubble sought to create a
system to classify
the galaxies. He came up with essentially
, such as the Milky Way,
, both giant and dwarf, and
. Every galaxy we see can
into one of those categories
You will note that many of the galaxies we talk about have catalog names that begin with NGC. What does
The largest structures in the universe come in only a
few basic types
Looking for a particular star?
Find it here!
Here’s the list of all 88 recognized constellations