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Topic: Blue Stars

NASA’s Hubble Space Telescope proves that everything is not as it appears

 

NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – Globular clusters are roughly spherical collections of extremely old stars, and around 150 of them are scattered around our galaxy. Hubble is one of the best telescopes for studying these, as its extremely high resolution lets astronomers see individual stars, even in the crowded core.

The clusters all look very similar, and in Hubble’s images it can be quite hard to tell them apart – and they all look much like NGC 411, pictured below.

Open cluster NGC 411 located in the Small Magellanic Cloud. (Photo credit ESA/Hubble & NASA)

Open cluster NGC 411 located in the Small Magellanic Cloud. (Photo credit ESA/Hubble & NASA)

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NASA’s Hubble Space Telescope discovers Black Hole surrounded by Star Cluster

 

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – Astronomers using NASA’s Hubble Space Telescope may have found evidence for a cluster of young, blue stars encircling one of the first intermediate-mass black holes ever discovered. Astronomers believe the black hole may once have been at the core of a now-disintegrated unseen dwarf galaxy.

The discovery of the black hole and the possible star cluster has important implications for understanding the evolution of supermassive black holes and galaxies.

This spectacular edge-on galaxy, called ESO 243-49, is home to an intermediate-mass black hole that may have been stripped off of a cannibalized dwarf galaxy. This is an unlikely place for such a massive back hole to exist, unless it belonged to a small galaxy that was gravitationally torn apart by ESO 243-49. (Credit: NASA; ESA; and S. Farrell, Sydney Institute for Astronomy, University of Sydney)

This spectacular edge-on galaxy, called ESO 243-49, is home to an intermediate-mass black hole that may have been stripped off of a cannibalized dwarf galaxy. This is an unlikely place for such a massive back hole to exist, unless it belonged to a small galaxy that was gravitationally torn apart by ESO 243-49. (Credit: NASA; ESA; and S. Farrell, Sydney Institute for Astronomy, University of Sydney)

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NASA’s Hubble Space Telescope Observes Barred Spiral Galaxy NGC 1073

 

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – Most spiral galaxies in the Universe have a bar structure in their centre, and Hubble’s image of NGC 1073 offers a particularly clear view of one of these. Galaxies’ star-filled bars are thought to emerge as gravitational density waves funnel gas toward the galactic centre, supplying the material to create new stars.

The transport of gas can also feed the supermassive black holes that lurk in the centres of almost every galaxy.

The NASA/ESA Hubble Space Telescope has taken a picture of the barred spiral galaxy NGC 1073, which is found in the constellation of Cetus (The Sea Monster). Our own galaxy, the Milky Way, is a similar barred spiral, and the study of galaxies such as NGC 1073 helps astronomers learn more about our celestial home. (Image credit: NASA, ESA)

The NASA/ESA Hubble Space Telescope has taken a picture of the barred spiral galaxy NGC 1073, which is found in the constellation of Cetus (The Sea Monster). Our own galaxy, the Milky Way, is a similar barred spiral, and the study of galaxies such as NGC 1073 helps astronomers learn more about our celestial home. (Image credit: NASA, ESA)

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