Earth Science 24B

galaxy that is shaped like a pinwheel

was concerned that objects that weren't stars might be confused with new comets

galaxy that looks like smooth glowing disks or flattened sphere of stars

group of stars that are close enough to be held together by gravity

Astronomers classify galaxies by their _________

the largest galaxies known are

Who published the New General Catalogue (NGC)

loose masses of many billions of stars, dust gases and the other objects

galaxy with no regular pattern or shape

brightest star on the handle of the Big Dipper

shape of the milky way galaxy

Dimmer star on the handle of the Big Dipper

If the stars in a visual double actually revolved around each other they are

a cloud of dust or gas that can be seen against a background of stars

Astronomers believe that the central source of gravity in galaxies may be immense ______ ___

the galaxy we live in