A hidden treasure in the Large Magellanic Cloud

A hidden treasure in the Large Magellanic Cloud
Nearly 200 000 light-years from Earth, the Large Magellanic Cloud, a satellite galaxy of the Milky Way, floats in space, in a long and slow dance around our galaxy. As the Milky Way’s gravity gently tugs on its neighbour’s gas clouds, they collapse to form new stars. In turn, these light up the gas clouds in a kaleidoscope of colours, visible in this image from the NASA/ESA Hubble Space Telescope. Credit: NASA, ESA. Acknowledgement: Josh Lake

(Phys.org)—Nearly 200 000 light-years from Earth, the Large Magellanic Cloud, a satellite galaxy of the Milky Way, floats in space, in a long and slow dance around our galaxy. Vast clouds of gas within it slowly collapse to form new stars. In turn, these light up the gas clouds in a riot of colours, visible in this image from the NASA/ESA Hubble Space Telescope.

The (LMC) is ablaze with star-forming regions. From the , the brightest stellar nursery in our cosmic neighbourhood, to LHA 120-N 11, part of which is featured in this Hubble image, the small and irregular galaxy is scattered with glowing nebulae, the most noticeable sign that new stars are being born.

The LMC is in an ideal position for astronomers to study the phenomena surrounding star formation. It lies in a fortuitous location in the sky, far enough from the plane of the Milky Way that it is neither outshone by too many nearby stars, nor obscured by the dust in the Milky Way's centre. It is also close enough to study in detail (less than a tenth of the distance of the , the closest ), and lies almost face-on to us, giving us a bird's eye view.

Nearly 200 000 light-years from Earth, the Large Magellanic Cloud, a satellite galaxy of the Milky Way, floats in space, in a long and slow dance around our galaxy. As the Milky Way’s gravity gently tugs on its neighbour’s gas clouds, they collapse to form new stars. In turn, these light up the gas clouds in a kaleidoscope of colours. This video zooms in from a view of the night sky into the Large Magellanic Cloud, and focuses in on part of LHA 120-N11, a region of glowing dust and gas with ongoing star formation. Credit: NASA, ESA, Digitized Sky Survey 2

LHA 120-N 11 (known as N11 for short) is a particularly bright region of the LMC, consisting of several adjacent pockets of gas and star formation. NGC 1769 (in the centre of this image) and NGC 1763 (to the right) are among the brightest parts. 

In the centre of this image, a dark finger of dust blots out much of the light. While nebulae are mostly made of hydrogen, the simplest and most plentiful element in the Universe, dust clouds are home to heavier and more complex elements, which go on to form like the Earth. Much finer than household dust (it is more like smoke), this interstellar dust consists of material expelled from previous generations of stars as they died.

A hidden treasure in the Large Magellanic Cloud
This wide field view of part of the Large Magellanic Cloud includes the location of the N11 star formation region. This image was created from digitised photographs through red and blue filters. The field of view is about three degrees across. Credit: ESO/Digitized Sky Survey 2. Acknowledgment: Davide De Martin

The data in this image were identified by Josh Lake, an astronomy teacher at Pomfret School in Connecticut, USA, in the Hubble's Hidden Treasures image processing competition. The competition invited members of the public to dig out unreleased scientific data from Hubble's vast archive, and to process them into stunning images. 

Josh Lake won first prize in the competition with an image contrasting the light from glowing hydrogen and nitrogen in N11. The image above combines the data he identified with additional exposures taken in blue, green and near infrared light.

Citation: A hidden treasure in the Large Magellanic Cloud (2013, January 17) retrieved 19 March 2024 from https://phys.org/news/2013-01-hidden-treasure-large-magellanic-cloud.html
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