new icn messageflickr-free-ic3d pan white
Hubble Views a Galaxy on the ‘Dark Side’ | by NASA Goddard Photo and Video
Back to photostream

Hubble Views a Galaxy on the ‘Dark Side’

Resting on the tail of the Great Bear in the constellation of Ursa Major lies NGC 5585, a spiral galaxy that is more than it appears.

 

The many stars and clouds of dust and gas that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy. As in many galaxies, this discrepancy can be explained by the abundant yet seemingly invisible presence of dark matter, a mysterious material that astronomers can’t directly observe.

 

The stellar disk of the galaxy extends over 35,000 light-years across. When compared with galaxies of a similar shape and size, NGC 5585 stands out by having a notably different composition. Contributing to the total mass of the galaxy, it contains a far higher proportion of dark matter.

 

Hot spots of star formation can be seen along the galaxy’s faint spiral arms. These regions shine a brilliant blue, contrasting strikingly against the ever-black background of space.

 

Credit: ESA/Hubble & NASA, R. Tully; acknowledgment: Gagandeep Anand

 

NASA image use policy.

 

NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

 

Follow us on Twitter

 

Like us on Facebook

 

Find us on Instagram

8,881 views
190 faves
3 comments
Uploaded on September 27, 2020