Check back to see if your country has been added. More countries will be added as more national contest organizers are identified. (*) To submit an essay for the Bangladesh contest, please use this link: Essay from Bangladesh. National coordinators can set their own deadline, but must follow the basic structure of the contest: same topics and similar age groups. Scientist for a Day 2020-2021 Contest National CoordinatorsĪnd Himansu Sekhar Hindi, Punjabi, Assamese, Bengali, Gujarati, Kannada, Malayalam, Marathi, Oriya, Sanskrit, Tamil, Telugu. must contact the contest National Coordinator in their country. Parallel contests are being run in other countries, and we welcome participation from additional nations. While Webb gives us a snapshot of the current state of the Cartwheel, it also provides insight into what happened to this galaxy in the past and how it will evolve in the future.While this contest is designed for students in the United States, our goal is to inspire students all over the world. The galaxy, which was presumably a normal spiral galaxy like the Milky Way before its collision, will continue to transform. Webb’s observations underscore that the Cartwheel is in a very transitory stage. These spokes are evident in previous Hubble observations released in 2018, but they become much more prominent in this Webb image. These regions form a series of spiraling spokes that essentially form the galaxy’s skeleton. It reveals regions within the Cartwheel Galaxy rich in hydrocarbons and other chemical compounds, as well as silicate dust, like much of the dust on Earth. MIRI data are colored red in this composite image. Learning finer details about the dust that inhabits the galaxy, however, requires Webb’s Mid-Infrared Instrument (MIRI). NIRCam also reveals the difference between the smooth distribution or shape of the older star populations and dense dust in the core compared to the clumpy shapes associated with the younger star populations outside of it. The galaxy displays many individual blue dots, which are individual stars or pockets of star formation. In this image, NIRCam data are colored blue, orange, and yellow. This is because young stars, many of which are forming in the outer ring, are less obscured by the presence of dust when observed in infrared light. The Near-Infrared Camera (NIRCam), Webb’s primary imager, looks in the near-infrared range from 0.6 to 5 microns, seeing crucial wavelengths of light that can reveal even more stars than observed in visible light. Webb, with its ability to detect infrared light, now uncovers new insights into the nature of the Cartwheel.ĭownload the full-resolution, uncompressed version and supporting visuals from the Space Telescope Science Institute But the dramatic galaxy has been shrouded in mystery – perhaps literally, given the amount of dust that obscures the view. Other telescopes, including the Hubble Space Telescope, have previously examined the Cartwheel. SIGN UP FOR SPACE COAST DAILY NEWS TEXT ALERTS HERE: As this ring expands, it plows into surrounding gas and triggers star formation. On the other hand, the outer ring, which has expanded for about 440 million years, is dominated by star formation and supernovas. The bright core contains a tremendous amount of hot dust with the brightest areas being the home to gigantic young star clusters. Because of these distinctive features, astronomers call this a “ring galaxy,” a structure less common than spiral galaxies like our Milky Way. These two rings expand outwards from the center of the collision, like ripples in a pond after a stone is tossed into it. The Cartwheel Galaxy sports two rings - a bright inner ring and a surrounding, colorful ring. The collision most notably affected the galaxy’s shape and structure. Collisions of galactic proportions cause a cascade of different, smaller events between the galaxies involved the Cartwheel is no exception. Its appearance, much like that of the wheel of a wagon, is the result of an intense event – a high-speed collision between a large spiral galaxy and a smaller galaxy not visible in this image. The Cartwheel Galaxy, located about 500 million light-years away in the Sculptor constellation, is a rare sight. This image provides a new view of how the Cartwheel Galaxy has changed over billions of years. Webb’s powerful infrared gaze produced this detailed image of the Cartwheel and two smaller companion galaxies against a backdrop of many other galaxies.
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