(The Andromeda Galaxy)
The Milky Way and Andromeda galaxies are both spiral galaxies, the Milky Way being confirmed as a barred spiral galaxy. It is believed also that Andromeda Galaxy is barred but that we cannot see its bar due to the flat angle it makes with our view from Earth.
A barred spiral galaxy (Notice the bar-shape of the center of the galaxy.):
The Andromeda Galaxy is thought to contain around one trillion stars, compared to our galaxy’s 200-400 billion. Astronomers estimate that it is 220,000 light-years across. The Milky Way is roughtly 100,000 l-y across. Both galaxies are thought to have giant black holes at their centers. Andromeda is one of the few blue-shifted galaxies, meaning that it is actually moving toward the Sun, which could also imply that some day the Milky Way and Andromeda will collide in about 2.5 billion years. Not much is known about what will happen, but one proposed theory is that the two may merge to become a large elliptical galaxy.
how do i supposed to know
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC