Tag Archives: Andromeda

New Hubble images to celebrate its upcoming 25th anniversary

The Space Telescope Science Institute (STScI) that operates the Hubble Space Telescope yesterday released two spectacular new images at the January meeting of the American Astronomical Society.

They also announced new data from Hubble that suggests a major eruption had occurred at the center of the Milky Way about two million years ago.

The Milky Way shrinks

The uncertainty of science: New research by astronomers suggests that the Milky Way is about half as massive as previously estimated.

In the sixties I remember astronomers claiming that the Milky Way was twice as big as Andromeda. Then it was considered half as big. Most recently it was considered about the same size. This new research makes it half as big as Andromeda again.

In other words, the data is very uncertain, and the scientists really don’t have a good handle on it. None of these conclusions should be taken very seriously. All we really know at this point is that the Milky Way and Andromeda are approximately comparable.

Using the Hubble Space Telescope, astronomers have determined that the Milky Way and Andromeda galaxies are on a collision course, and will meet head on in 4 billion years.

Using the Hubble Space Telescope, astronomers have determined that the Milky Way and Andromeda galaxies are on a collision course, and will meet head on in 4 billion years.

You can download the science paper describing these results in detail here [pdf].