galaxies

Galaxies are clusters of stars and gas. We are in the galaxy called the Milky way named after a Greek myth in which I cannot remember. The milky way is a spiral type galaxy but some scientists think it's a barred galaxy. The type of  galaxy depends on its shape.The spiral type being a spiral shape, barred galaxies are spiral galaxies but with two arms instead of many. Then there are elliptical galaxies are flat an contain billions of old stars. Lenticular galaxies are like a CD, with a "hole" in the middle and  a circular shape. Finally there are irregular galaxies which come in all shapes and sizes. All galaxies have one thing in common, a super-massive black hole or an ultra-massive black hole in the middle of the galaxy. Most galaxies have older stars near the centre and new stars near the outer regions. Galaxies types also have sub-divisions. For example, one type is spiral Sb. These sub divisions each have a different feature to a spiral type Sc or any other of its type.

Well bloggers, thats it for today, see you!