A frEGGS-plosion of Star Formation

This image, taken with the NASA/ESA Hubble Space Telescope, depicts a special class of star-forming nursery known as Free-floating Evaporating Gaseous Globules, or frEGGs for short. This object is formally known as J025157.5+600606.

When a massive new star starts to shine while still within the cool molecular cloud from which it formed, its energetic radiation can ionise the cloud’s hydrogen and create a large, hot bubble of ionised gas. Amazingly, located within this bubble of hot gas around a nearby massive star are the frEGGs: dark compact globules of dust and gas, some of which are giving birth to low-mass stars. The boundary between the cool, dusty frEGG and the hot gas bubble is seen as the glowing purple/blue edges in this fascinating image.

In July 2020 a previous ESA/Hubble Picture of the Week, of J025027.7+600849, featured another frEEG.

Credit:

ESA/Hubble & NASA, R. Sahai

About the Image

Id:potw2041a
Type:Observation
Release date:12 October 2020, 06:00
Size:3994 x 3916 px

About the Object

Name:J025157.5+600606
Type:Milky Way : Nebula : Type : Star Formation
Constellation:Cassiopeia
Category:Nebulae

Image Formats

Large JPEG
3.9 MB
Screensize JPEG
195.5 KB

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197.7 KB
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Coordinates

Position (RA):2 51 55.65
Position (Dec):60° 5' 59.56"
Field of view:3.33 x 3.26 arcminutes
Orientation:North is 26.6° left of vertical

Colours & filters

BandWavelengthTelescope
Optical
V
606 nm Hubble Space Telescope
ACS
Optical
I
814 nm Hubble Space Telescope
ACS
Optical
V
606 nm Hubble Space Telescope
ACS
Optical
N II
658 nm Hubble Space Telescope
ACS
Optical
I
814 nm Hubble Space Telescope
ACS

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