Milky Way tagged posts

The first direct ...

Close look at what might be happening in other, more energetic galaxies. The center of our galaxy is a frenzy of activity. A behemoth black hole – 4 million times as massive as the sun – blasts out energy as it chows down on interstellar detritus while neighboring stars burst to life and subsequently explode.

Now, an international team of astronomers has discovered two exhaust channels – dubbed “galactic center chimneys” – that appear to funnel matter and energy away from the cosmic firewo...

Figure 1: The Milky Way galaxy, perturbed by the tidal interaction with a dwarf galaxy, as predicted by N-body simulations. The locations of the observed stars above and below the disk, which are used to test the perturbation scenario, are indicated.

An international team of astronomers led by the Max Planck Institute for Astronomy (MPIA) has made a surprising discovery about the birthplace of groups of stars located in the halo of our Milky Way galaxy. These halo stars are grouped together in giant structures that orbit the center of our galaxy, above and below the flat disk of the Milky Way. Researchers thought they may have formed from debris left behind by smaller galaxies that invaded the Milky Way in the past.

But astronomers now have compelling evidence showing that some of these ha...

This is a three-color optical image of a Milky Way sibling. Credit: Sloan Digital Sky Survey

The most-studied galaxy in the universe – the Milky Way – might not be as “typical” as previously thought, according to a new study. The Milky Way, which is home to Earth and its solar system, is host to several dozen smaller galaxy satellites. These smaller galaxies orbit around the Milky Way and are useful in understanding the Milky Way itself. Early results from the Satellites Around Galactic Analogs (SAGA) Survey indicate that the Milky Way’s satellites are much more tranquil than other systems of comparable luminosity and environment. Many satellites of those “sibling” galaxies are actively pumping out new stars, but the Milky Way’s satellites are mostly inert, the researchers found.

This is...