Register for an account

X

Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.

X

Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

The Sciences

Hubble Reveals the Tendril-Like Arms of This Barred Spiral Galaxy

A barred spiral galaxy shines in a recent Hubble photo.

By Lacy SchleyNovember 11, 2019 12:00 PM
NGC 7773 - Hubble
NGC 7773 (Credit: ESA/Hubble & NASA. J. Walsh)

Newsletter

Sign up for our email newsletter for the latest science news

NGC 7773, captured here in a recent Hubble Space Telescope photo, might just be the ideal example of what astronomers call a barred spiral galaxy. Its tendril-like arms spiral out from the center, a star-filled rectangular smudge, or “bar.” Astronomers have observed these central features more often in older galaxies (like our own Milky Way) than in younger ones, so they suspect the formations develop as the star systems age. Over time, the gaseous materials that create stars migrate in from the spirals and converge in the central bar, powering new stellar birth.


[This story originally appeared in print as "Bar Exam."]

2 Free Articles Left

Want it all? Get unlimited access when you subscribe.

Subscribe

Already a subscriber? Register or Log In

Want unlimited access?

Subscribe today and save 70%

Subscribe

Already a subscriber? Register or Log In