astronomy

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Photography Science

Composite Images From NASA’s Most Powerful Telescopes Reveal Mind-Boggling Details of the Cosmos

Combining data from some of NASA’s most powerful instruments, four new composites highlight the enormity of the cosmos in unprecedented detail. Imagery from the Chandra Observatory and the James Webb and Hubble telescopes—plus infrared information from the Spitzer telescope’s final missions—mesh together to generate mesmerizing views of iconic nebulae and galaxies.

Messier 74, a spiral galaxy more than 30 million light-years from Earth, is sometimes called the Phantom Galaxy due to its relative dimness (despite hosting around 100 billion stars!). Webb captured its swirling network in infrared, spotlighting gas and dust, while Chandra provided X-ray data of high-energy stars. Returning a little closer to home, for the Pillars of Creation in Messier 16, a.k.a. the Eagle Nebula—about 7,000 light-years away—Webb contributed the dusty forms that shroud fledgling stars and Chandra included the glowing blue and red dots.

Explore in-depth analysis of the images, plus the individual sources, on the Chandra Observatory’s website, which also include a star cluster called NGC 34 and the “barred spiral” galaxy NGC 1672. (via PetaPixel)

 

Photography

Vivid Photographs by Cari Letelier Follow the Aurora Borealis Across Iceland’s Night Sky

During the last couple days in February, a series of impressive solar storms sent the aurora borealis as far as California and Western Australia. The lights were particularly brilliant in northern places like Scotland and Iceland where the long winter nights provide ample darkness as a backdrop to the waving illuminations. Chile-based photographer Cari Letelier took advantage of Iceland’s position just a few degrees south of the Arctic Circle to capture vibrant images of the auroras as they traversed the skies above waterfalls, icy expanses, and the Arctic Henge.

The northern lights result from enormous solar events in which the sun emits energized particles that slam into Earth’s upper atmosphere at speeds of up to 45 million miles per hour. Earth’s protective magnetic field redirects the particles toward the poles in a process that produces spectacular light shows. Letelier had been to Iceland once in 2019, but didn’t have much luck finding the phenomena, sharing that when she reached the Arctic Henge, “it was so cloudy and snowing, I told myself, ‘I have to come back and catch this place with the aurora.'”

This time, when she and a fellow photographer learned that there would be a solar flare that was likely to produce a spectacle, they made the seven-hour journey from the southern part of the island in search of sightings and captured some incredible images. “I had to make a decision whether to take the photo or to enjoy the show making mental captures,” she says. “As I wanted to make both, I set my camera to shoot photos for a timelapse while I was watching at the sky.”

Find more of Letelier’s work on her website and Instagram.

 

Photography Science

A Staggering 3.32 Billion Celestial Objects Dot an Enormous New Image of the Milky Way

A massive new composite released earlier this year reveals a confounding number of stars in the Milky Way. An international collaboration gathered from multiple telescopes at Cerro Tololo Inter-American Observatory in Chile, the stunning work captures a staggering 3.32 billion celestial objects across 130 degrees of the night sky—for context, the NSF’s NOIRLab team, which is responsible for the 21,400-image composite, shares that this stretch “equates to 13,000 times the angular area of the full moon.”

Requiring about 260 hours of observation, this new release follows data shared in 2017, although its breadth is far greater and allows for a complete 360-degree panoramic view. The full image shown below highlights the Milky Way’s vibrant band containing most of the stellar objects, while the detailed crop above captures an extraordinarily concentrated area. Researchers said about the density in a statement:

While this profusion of stars and dust makes for beautiful images, it also makes the galactic plane challenging to observe. The dark tendrils of dust seen threading through this image absorb starlight and blot out fainter stars entirely, and the light from diffuse nebulae interferes with any attempts to measure the brightness of individual objects. Another challenge arises from the sheer number of stars, which can overlap in the image and make it difficult to disentangle individual stars from their neighbors.

In addition to the standalone images, astronomers also released an interactive version for those interested in exploring specific locations and details within the celestial expanse. (via Kottke)

 

History Photography Science

A Scientific Paint-By-Number Pastel Drawing Was Our First Closeup Image of Mars

Let’s rewind to 1965. Around ten years before the personal computer was invented and twenty years before the first cell phones were released to the public, this was the year that saw the first color television released to the mass market. Families would gather around the set to catch up on daily news broadcasts on one of three channels. On July 15, when NASA’s Mariner 4 probe flew within 6,118 miles of Mars as it passed the planet, it was big news, but when the image data was transmitted back to Earth, scientists didn’t have the technology to quickly render a photograph that could be televised. Taking a queue from a popular mid-century pastime, the very first representation of another planet viewed from a vantage point in space was a data-driven paint-by-number drawing.

The Mariner 4 probe was NASA’s second attempt to capture an image of the surface of Mars after a camera shroud malfunctioned on Mariner 3. Dan Goods, who presently leads a team called The Studio at NASA’s Jet Propulsion Laboratory, describes how the scientists troubleshot and devised their next steps when faced with technical anomalies and errors:

After the flyby of the planet, it would take several hours for computers to process a real image. So while they were waiting, the engineers thought of different ways of taking the 1’s and 0’s from the actual data and create an image. After a few variations, it seemed most efficient to print out the digits and color over them based upon how bright each pixel was.

 

We now turn our focus to a scientist named Richard Grumm, who chose a more analog means of visualizing data as a failsafe if the intended image failed to transmit. He went to a local art supplies shop and requested gray chalk; the shop sent him with back to the lab with a pack of Rembrandt pastels. He and his team used the crayons to color in the 1’s and 0’s data, printed on 3-inch wide ticker tape, and determined the brightness level of the image using a key in shades of orange, brown, and yellow.

In spite of Mars’ nickname the “Red Planet,” the color scheme was coincidental. Grumm was concerned primarily with gradients and how it would appear in grayscale, since televisions were still in black-and-white. He justified the drawing to the Jet Propulsion Lab’s wary PR department—which thought the pastel drawing would be a distraction and preferred the public saw the real image—as a means to record the data in case Mariner 4’s equipment also failed. Eventually, the media found out anyway, and the pastel drawing was the first image of Mars to be broadcast on television.

In time, Mariner 4’s black-and-white photograph did come through successfully, and in comparison, Grumm’s drawing appears widened due to the width of the ticker tape. You can read more about this historic moment on Dan Goods’ blog and on the NASA website. (via Kottke)

 

Photography Science

The ‘Pillars of Creation’ Glow in Remarkable Detail in a Groundbreaking Image from NASA’s James Webb Telescope

In a small region within the vast Eagle Nebula—a 6,500 light-year journey from our solar system in the constellation Serpens—the iconic “Pillars of Creation” appear in a ghostly formation. Made of cool hydrogen gas and dust, these incubators for new stars are dense celestial structures that have survived longer than their surroundings. Ultraviolet light from incredibly hot newborn stars gradually erodes the surrounding space and illuminates the ethereal surfaces of the pillars and the streams of gas they emit.

Since July, NASA’s James Webb Space Telescope has released numerous photographs of the cosmos in unprecedented detail. To process this image, scientists combined captures taken with the telescope’s Near-Infrared Camera (NIRCam) and Mid-Infrared Instrument (MIRI), which brought different elements into focus. Near-infrared light emphasizes the stars, including thousands of newly-formed orange spheres that hover around the columns. The saturated hues around the interstellar formations are visible thanks to the mid-infrared contribution, which highlights the diffused orange dust around the top, deep indigo of the densest regions, and bright neutral color of the pillars. Lava-red spots on the upper parts of the spires contain young, embedded stars that will continue to form for millions of years.

See the full 47.59-megapixel photograph on the James Webb website. (via PetaPixel)

 

Photography Science

NASA’s James Webb Telescope Captures an Astounding Photo of the Gaseous Pillars of Creation

Back in 1995, NASA’s Hubble Space Telescope documented the now iconic Pillars of Creation, a photo of a celestial area known for its staggering number of star formations. That initial image offered an illuminating glimpse of the interstellar stone-like columns made of gas and dust, although a composite recently released from the James Webb Space Telescope uses near-infrared light to highlight the region in even more detail.

This new 122-megapixel photo features a deep-blue expanse studded with light, and the pillars themselves appear less opaque than in the earlier shot. When cropped, the new image shows the Eagle Nebula, located 6,500 light-years away. The bright red fiery orbs apparent from this view are new stars, which are formed “when knots with sufficient mass form within the pillars of gas and dust… begin to collapse under their own gravity (and) slowly heat up.”

 

Some of the incandescent bodies still in the early stages of life also produce undulating, lava-like ejections, which NASA describes:

Young stars periodically shoot out supersonic jets that collide with clouds of material, like these thick pillars. This sometimes also results in bow shocks, which can form wavy patterns like a boat does as it moves through water. The crimson glow comes from the energetic hydrogen molecules that result from jets and shocks. This is evident in the second and third pillars from the top–the NIRCam image is practically pulsing with their activity. These young stars are estimated to be only a few hundred thousand years old.

Researchers say the new photo will allow more accurate counts of new formations and their development.