Language Selection

English French German Italian Portuguese Spanish

Bar at Milky Way's heart revealed

Filed under
Sci/Tech

The Milky Way is not a perfect spiral galaxy but instead sports a long bar through its centre, according to new infrared observations from NASA's Spitzer Space Telescope.

Galaxies come in a wide variety of shapes usually thought to be produced by gravitational interactions with nearby objects. Some spiral galaxies look like pinwheels, with their arms curving out from a central bulge, while others have a straight bar at their centres.

Radio telescopes detected gas that hinted at a bar at the heart of the Milky Way in the late 1980s. A decade later, observations with the near infrared survey 2MASS bolstered the case for a bar, but dust in the centre of the galaxy obscured the observations.

Now, astronomers have used Spitzer to peer through that dust at slightly longer wavelengths, observing 30 million stars in the galactic plane in the region around the centre of the galaxy.

They found that the central bar was much longer than previous observations had suggested - reaching about half the distance between the galaxy's centre and our Sun. The bar is estimated to stretch a total of about 27,000 light years from end to end.

"It is a major component of our galaxy and has basically remained hidden until now," says team member Ed Churchwell, an astronomer at the University of Wisconsin in Madison, US. "The fact that it's large means it's going to have a major effect on the dynamics of the inner part of our galaxy."

Full Story.

More in Tux Machines

Video of AsteroidOS

KDevelop 5.2.2 and 5.2.3 released

KDevelop 5.2.2 and 5.2.3 released We today provide a stabilization and bugfix release with version 5.2.2 and 5.2.3. 5.2.2 was tagged 6 weeks ago, but we never managed to release it because we did not have the patience to fix the Windows installers in time due to a broken CI. Windows installers are provided for 5.2.3 again. We'll only provide source tarballs for 5.2.2 and we encourage everyone to just skip this release and use 5.2.3 which contains a few more bug fixes. This is a bugfix-only release, which introduces no new features and as such is a safe and recommended update for everyone currently using KDevelop 5.2.1. Read more Also: This week in Usability & Productivity, part 19

FreeOffice 2018 Release is Seamlessly Compatible With MS Office on Linux

FreeOffice 2018 has just been released and it provides even better support for Microsoft Office documents on Linux. Read more

Android Leftovers