Colours of the Lost Galaxy

Located in the constellation of Virgo (The Virgin), around 50 million light-years from Earth, NGC 4535 is truly a stunning sight to behold. Despite the incredible quality of this image, taken from the NASA/ESA Hubble Space Telescope, NGC 4535 has a hazy, somewhat ghostly, appearance when viewed from a smaller telescope. This led amateur astronomer Leland S. Copeland to nickname NGC 4535 the “Lost Galaxy” in the 1950s.

The bright colours in this image aren’t just beautiful to look at, as they actually tell us about the population of stars within this barred spiral galaxy. The bright blue-ish colours, seen nestled amongst NGC 4535’s long, spiral arms, indicate the presence of a greater number of younger and hotter stars. In contrast, the yellower tones of this galaxy’s bulge suggest that this central area is home to stars which are older and cooler. 

This galaxy was studied as part of the PHANGS survey, which aims to clarify many of the links between cold gas clouds, star formation, and the overall shape and other properties of galaxies. On 11 January 2021 the first release of the PHANGS-HST Collection was made publicly available. 

Credit:

ESA/Hubble & NASA, J. Lee and the PHANGS-HST Team

About the Image

Id:potw2103a
Type:Observation
Release date:18 January 2021, 06:00
Size:3910 x 3505 px

About the Object

Name:NGC 4535
Type:Local Universe : Galaxy : Type : Spiral
Constellation:Virgo
Category:Galaxies

Image Formats

Large JPEG
4.4 MB
Screensize JPEG
408.5 KB

Zoomable


Wallpapers

1024x768
348.4 KB
1280x1024
565.4 KB
1600x1200
817.6 KB
1920x1200
959.8 KB
2048x1536
1.3 MB

Coordinates

Position (RA):12 34 20.17
Position (Dec):8° 12' 4.76"
Field of view:2.64 x 2.70 arcminutes
Orientation:North is 195.7° left of vertical


Colours & filters

BandWavelengthTelescope
Optical
U
336 nm Hubble Space Telescope
WFC3
Optical
B
438 nm Hubble Space Telescope
WFC3
Optical
V
555 nm Hubble Space Telescope
WFC3
Optical
I
814 nm Hubble Space Telescope
WFC3
Ultraviolet
UV
275 nm Hubble Space Telescope
WFC3

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