![]() The Hubble Space Telescope captured an image of the galaxy cluster ACO S520, containing several interesting astronomical finds, including a ring-shaped galaxy and a pair of bright stars. The observations are part of a series searching for massive, luminous galaxy clusters that had not been previously explored, providing insights into the distribution of dark matter and offering a unique natural gravitational lens to study distant objects. Alongside several large elliptical galaxies, the image reveals a ring-shaped galaxy and a pair of bright stars notable for their colorful crisscrossing diffraction spikes. In return, they make us look as though we know what we’re doing.This stunning image, captured by the Hubble Space Telescope, showcases the galaxy cluster ACO S520, located in the constellation Pictor. “It has occurred to that we are there to provide them support, drive and work the radio. They work their hearts out for nothing more than praise and a toy reward,” Ferguson wrote. “We have no idea how these amazing creatures do such marvelous feats. The child find was notable due to the large amount of scent contamination in the area,” Ferguson added. Live finds include one man who wandered over 10 miles after a head wound and a 6-year-old who had been out all night …. “Our K-9s have located drops of blood in light rain and human decomposition in various vehicles. “They constantly make decisions that seem unusual at the time but make sense once the full story is known.” “We have learned to allow the K-9s to do their work with as little supervision as possible,” Ferguson wrote. Ferguson shared his fascination with dogs’ sniffing abilities, having worked with the animals in search and rescue efforts for the last 20 years with his wife. “The eight points are a distinctive feature of JWST, like an artist’s signature.” “Images from the Hubble Space Telescope have these too, but they only have four,” Grossman says. ![]() Scientists designed the telescope so that four of the spikes from the secondary supports overlap with four of the primary mirror’s spikes, Grossman says, so though there are 12 spikes, we see only eight.ĭiffraction spikes are not unique to JWST. The six edges of the primary mirror also create six spikes. When it hits the telescope, light bends at the two edges of each of the secondary mirror’s supports, producing six diffraction spikes. JWST has two mirrors: a primary hexagonal mirror and a smaller secondary mirror that sits in front of the primary mirror and is held up by three support beams. Those are called diffraction spikes, Grossman says, and they’re an artifact of the telescope’s optical setup. Reader Stu Kantor asked why some stars in the JWST images appear to have eight spikes - six large ones and two smaller ones (see “Out of this world,” below). “There’s a subjective artistry to it too.” How to colorize those elements can be more of an art than a science, Grossman says. But there are also other considerations, such as data on the chemical compositions of stuff in the image. Wavelengths in between are assigned a spectrum of greens and yellows ( SN: 3/17/18, p. The light emitted in the longest wavelength in an image is assigned the color red, and the shortest blue, she says. Their basic rule of thumb is to paint the pictures using wavelengths of light as a guide. JWST’s images are colorized by senior data imaging developer Joseph DePasquale and science visuals developer Alyssa Pagan, both of the Space Telescope Science Institute in Baltimore, Grossman says. Reader John Dohrmann wondered how that colorizing is done. To visualize the images, scientists colorize them. JWST observes space using infrared, a form of light not visible to the human eye. The stunning first pictures from the James Webb Space Telescope provide the deepest and clearest look yet into outer space, Lisa Grossman reported in “ Postcards from a new space telescope” (SN: 8/13/22, p.
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