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Tags: Hasselblad Hasselblad 907x 100c xcd 55v Osaka Japan Japan Edition street photography Street People Watch Medium Format 645
© All Rights Reserved
Tags: Hasselblad Hasselblad 907x 100c xcd 55v Osaka Japan Japan Edition street photography Street People Watch Medium Format 645
© All Rights Reserved
This NASA/ESA Hubble Space Telescope image features a spiral galaxy in the constellation Virgo named NGC 5668. It is relatively near to us at 90 million light-years from Earth and quite accessible for astronomers to study with both space- and ground-based telescopes. At first glance, it doesn’t seem like a remarkable galaxy. It is around 90,000 light-years across, similar in size and mass to our own Milky Way galaxy, and its nearly face-on orientation shows open spiral arms made of cloudy, irregular patches.
One noticeable difference between the Milky Way galaxy and NGC 5668 is that this galaxy is forming new stars 60% more quickly. Astronomers have identified two main drivers of star formation in NGC 5668. Firstly, this high-quality Hubble view reveals a bar at the galaxy’s center, though it might look more like a slight oval shape than a real bar. The bar appears to have affected the galaxy’s star formation rate, as central bars do in many spiral galaxies. Secondly, astronomers tracked high-velocity clouds of hydrogen gas moving vertically between the disk of the galaxy and the spherical, faint halo which surrounds it. These movements may be the result of strong stellar winds from hot, massive stars, that would contribute gas to new star-forming regions.
Credit: ESA/Hubble & NASA, C. Kilpatrick
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It’s giving rainbows and unicorns, like a middle school binder 🌈
Meet NGC 602, a young star cluster in the Small Magellanic Cloud (one of our satellite galaxies), where astronomers using @NASAWebb have found candidates for the first brown dwarfs outside of our galaxy. This star cluster has a similar environment to the kinds of star-forming regions that would have existed in the early Universe—with very low amounts of elements heavier than hydrogen and helium. It’s drastically different from our own solar neighborhood and close enough to study in detail.
Brown dwarfs are… not quite stars, but also not quite gas giant planets either. Typically they range from about 13 to 75 Jupiter masses. They are also free-floating; they aren’t gravitationally bound to a star like a planet would be. But they do share some characteristics with exoplanets, like storm patterns and atmospheric composition.
@NASAHubble showed us that NGC 602 harbors some very young low-mass stars; Webb is showing us how significant and extensive objects like brown dwarfs are in this cluster. Scientists are excited to better be able to understand how they form, particularly in an environment similar to the harsh conditions of the early universe.
Read more: esawebb.org/news/weic2425/
Image description: A star cluster is shown inside a large nebula of many-coloured gas and dust. The material forms dark ridges and peaks of gas and dust surrounding the cluster, lit on the inner side, while layers of diffuse, translucent clouds blanket over them. Around and within the gas, a huge number of distant galaxies can be seen, some quite large, as well as a few stars nearer to us which are very large and bright.
Image Credit: ESA/Webb, NASA & CSA, P. Zeidler, E. Sabbi, A. Nota, M. Zamani (ESA/Webb)
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