A Hubble gem: the Jewel Box
This image is a “close-up” view from the NASA/ESA Hubble Space Telescope of NGC 4755, or the Jewel Box cluster. Several very bright, pale blue supergiant stars, a solitary ruby-red supergiant and a variety of other brilliantly coloured stars are visible in the image, as well as many much fainter ones, often with intriguing colours. The huge variety in brightness exists because the brighter stars are 15 to 20 times the mass of the Sun, while the dim points are less than half the mass of the Sun. This is the first image of an open galactic cluster with imaging extending from the far ultraviolet to the near-infrared.
Credit:
NASA/ESA and Jesús Maíz Apellániz (Instituto de Astrofísica de Andalucía, Spain)
About the Image
| Id: | eso0940c |
| Type: | Observation |
| Release date: | 29 October 2009 |
| Related releases: | eso0940 |
| Size: | 3016 x 1487 px |
About the Object
| Name: | Jewel Box Cluster, NGC 4755 |
| Type: | • Milky Way : Star : Grouping : Cluster : Open |
| Distance: | 6500 light years |
Colours & filters
| Band | Wavelength | Telescope |
| Ultraviolet Far-UV |
170 nm | Hubble Space Telescope WFPC2 |
| Ultraviolet Mid-UV |
255 nm | Hubble Space Telescope WFPC2 |
| Ultraviolet Near-UV |
336 nm | Hubble Space Telescope WFPC2 |
| Optical B |
439 nm | Hubble Space Telescope WFPC2 |
| Optical V |
547 nm | Hubble Space Telescope WFPC2 |
| Optical R |
675 nm | Hubble Space Telescope WFPC2 |
| Infrared I |
814 nm | Hubble Space Telescope WFPC2 |
Images
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