A snowstorm of stars

It’s beginning to look a lot like Christmas in this NASA/ESA Hubble Space Telescope image of a blizzard of stars, which resembles a swirling storm in a snow globe.

These stars make up the globular cluster Messier 79, located about 40 000 light-years from Earth in the constellation of Lepus (The Hare). Globular clusters are gravitationally bound groupings of up to one million stars. These giant “star globes” contain some of the oldest stars in our galaxy. Messier 79 is no exception; it contains about 150 000 stars, packed into an area measuring just roughly 120 light-years across.

This 11.7-billion-year-old star cluster was first discovered by French astronomer Pierre Méchain in 1780. Méchain reported the finding to his colleague Charles Messier, who included it in his catalogue of non-cometary objects: The Messier catalogue. About four years later, using a larger telescope than Messier’s, William Herschel was able to resolve the stars in Messier 79 and described it as a “globular star cluster.”

In this sparkling Hubble image, Sun-like stars appear yellow-white and the reddish stars are bright giants that are in the final stages of their lives. Most of the blue stars sprinkled throughout the cluster are aging “helium-burning” stars, which have exhausted their hydrogen fuel and are now fusing helium in their cores.

Credit:

NASA and ESA
Acknowledgement: S. Djorgovski (Caltech) and F. Ferraro (University of Bologna)

About the Image

Id:potw1751a
Type:Observation
Release date:18 December 2017, 06:00
Size:1503 x 1002 px

About the Object

Name:Messier 79
Type:Milky Way : Star : Grouping : Cluster : Globular
Distance:40000 light years
Constellation:Lepus
Category:Star Clusters

Image Formats

Large JPEG
873.0 KB
Screensize JPEG
413.7 KB

Zoomable


Wallpapers

1024x768
543.9 KB
1280x1024
734.5 KB
1600x1200
954.4 KB
1920x1200
1.1 MB
2048x1536
1.3 MB

Coordinates

Position (RA):5 24 10.84
Position (Dec):-24° 31' 24.78"
Field of view:2.51 x 1.67 arcminutes
Orientation:North is 0.1° left of vertical

Colours & filters

BandWavelengthTelescope
Optical
B
439 nm Hubble Space Telescope
WFPC2
Optical
u
336 nm Hubble Space Telescope
WFPC2
Optical
u
336 nm Hubble Space Telescope
WFPC2
Optical
V
555 nm Hubble Space Telescope
WFPC2
Optical
B
439 nm Hubble Space Telescope
WFPC2
Optical
V
555 nm Hubble Space Telescope
WFPC2

Also see our


Accelerated by CDN77