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Showing posts from December, 2023

VIPER Mission Manager Update: Flight Rover Reaches Half-Built.

  The dedicated VIPER team is diligently constructing the lunar-bound flight vehicle, slated to touch down on the Moon in just one year. At the halfway mark of the build, enthusiasts can actively witness the intricate process and gain insights from the team's experts through engaging livestreams. A significant achievement occurred during the summer, as all science instrument teams successfully delivered their payloads to the VIPER Systems Integration & Test team.  Remarkably, nearly all instruments are now seamlessly integrated into the flight rover, marking a substantial milestone and overcoming a common hurdle in aerospace projects. The project leader expresses satisfaction in having all components aligned, likening it to having all the birds securely nested. Reaching another crucial milestone, the VIPER project has successfully received the majority of essential hardware from external vendors. This achievement holds particular significance, considering the challenges po...

Juno's Close Encounter: NASA's Probe to Investigate Jupiter's Volcanic Moon Io on December 30th.

  Capturing the north polar expanse of Jupiter's moon Io, this striking image, taken by NASA's Juno on October 15, unveils three previously unseen mountain peaks near the day-night border. Juno, with 56 flybys of Jupiter under its belt, has meticulously documented close encounters with three of the gas giant's largest moons. A significant milestone awaits on Saturday, December 30, as Juno embarks on the closest flyby of Io in over two decades, bringing the spacecraft within approximately 930 miles (1,500 kilometers) of this intensely volcanic moon. This proximity promises a deluge of data, as Juno's instruments stand poised to glean unprecedented insights from this daring journey. Juno's principal investigator, Scott Bolton of the Southwest Research Institute in San Antonio, Texas, underscores the significance of the upcoming Io flyby. By amalgamating data from this close encounter with previous observations, the Juno science team aims to unravel the dynamics of Io...

Exploring Cosmic Frontiers: The Pioneering Infrared Telescopes Preceding NASA’s Webb.

  For four decades, scientists have delved into the cosmos using infrared space telescopes, marking significant milestones with missions like the Infrared Astronomical Satellite (IRAS), launched in 1983; the Spitzer Space Telescope, launched in 2003; and the groundbreaking James Webb Space Telescope, which embarked on its celestial journey in 2021. As the James Webb Space Telescope commemorates its two-year launch anniversary on December 25, NASA reflects on the profound impact of its predecessors. The Webb telescope, with its unparalleled clarity in imaging, ushers in a new era of exploration, standing on the shoulders of space telescopes spanning 40 years, including the pivotal contributions of Spitzer and IRAS. The scientific revelations from Webb's observations are only beginning, promising to unravel the mysteries of the universe in unprecedented detail. The rich heritage of infrared space telescopes illuminates NASA's images of Rho Ophiuchi, a proximate star-forming regio...

NASA's Hubble Space Telescope reveals a spiral galaxy with 'forbidden' light.

  This captivating image showcases the whirling splendor of MCG-01-24-014, a luminous spiral galaxy situated approximately 275 million light-years away from Earth. Beyond its distinct spiral structure, MCG-01-24-014 boasts an exceptionally dynamic core classified as an active galactic nucleus (AGN), placing it in the category of a Type-2 Seyfert galaxy. Seyfert galaxies, akin to quasars, host one of the prevalent subclasses of AGNs. In the nuanced realm of AGN classification, Seyfert galaxies like MCG-01-24-014 are characterized by their relative proximity, with the central AGN not overpowering its host, in contrast to quasars that exhibit extraordinary luminosities and reside at vast distances, outshining their host galaxies. Within the realm of Seyfert galaxies and quasars, there exist further subclasses, adding layers of complexity to our understanding of these celestial phenomena. In the case of Seyfert galaxies, astronomers delineate between Type-1 and Type-2 based on their di...

Hubble shows the richness of spiral galaxies.

  In this mesmerizing Hubble Picture of the Week, a tapestry of spiral galaxies unfolds. The dominant presence on the right is NGC 1356, flanked by seemingly smaller spiral galaxies—LEDA 467699 above and LEDA 95415 at its left. Completing the cosmic ensemble is IC 1947 along the left side of the image. This celestial snapshot offers a fascinating illustration of the challenge in discerning whether galaxies are truly in close proximity or merely appear so from Earth's perspective. At first glance, NGC 1356, LEDA 467699, and LEDA 95415 may seem like close companions, while IC 1947 appears more distant. However, the image's two-dimensional nature only hints at angular separation—how objects are spread across the night sky's sphere. It cannot convey the true distance of these celestial entities from Earth. Delving into the cosmic distances, the apparent proximity of NGC 1356 and LEDA 95415 in the image is deceiving. Despite their appearance of interaction, NGC 1356 is situated ...

An ode to NASA's Perseverance Mars rover and the Ingenuity helicopter.

  In a remarkable Martian moment, NASA's Perseverance Mars rover captured a selfie featuring the Ingenuity helicopter, positioned approximately 13 feet (3.9 meters) from the rover. Taken by the WATSON camera mounted on the rover's robotic arm on April 6, 2021, this image provides a snapshot of the historic encounter on the 46th Martian day, or sol, of the mission, showcasing the collaborative efforts of exploration on the Red Planet. In the boundless realm where aspirations soar high, a narrative unfurls of valor and strength. Mars, cradled in the distant embrace of the red planet, becomes the backdrop for a cosmic companionship. Etched in the annals of the cosmos, a tale of courage and might unfolds, featuring the intrepid duo of Perseverance and Ingenuity—bold and brave. Their legacy resonates, a source of inspiration urging souls to reach for the stars and pursue their loftiest ambitions. Perseverance, the intrepid rover traversing alien soil, dedicates itself to unraveling ...

NASA's Hubble Space Telescope discovered a phenomenon called Saturn's cloud bands and ring spokes.

  Captured by NASA's Hubble Space Telescope on October 22, 2023, this striking image of Saturn unveils the enigmatic phenomenon known as ring spokes. Situated approximately 850 million miles from Earth, Saturn's spokes are fleeting features that revolve in tandem with the rings, their ethereal presence lasting only two or three rotations around the planet. During active periods, these spokes form continuously, contributing to the intricate pattern observed.  Notably, the Voyager 2 spacecraft initially photographed the ring spokes in 1981, while NASA's Cassini orbiter, throughout its 13-year mission concluding in 2017, also provided insights into these captivating and transient features. Hubble's vigilance extends to Saturn, with annual observations tracking the recurring appearance and disappearance of the mysterious spokes. Facilitated by Hubble's Outer Planets Atmospheres Legacy (OPAL) program, initiated nearly a decade ago, this systematic monitoring aims to capt...

Created a 14-year time interval of the gamma-ray sky from data obtained by NASA's Fermi mission.

  The celestial theater unfolds in a captivating all-sky time-lapse crafted from 14 years of data collected by NASA's Fermi Gamma-ray Space Telescope. The Sun, intermittently bursting into prominence, gracefully charts its course across the firmament against the dynamic backdrop of high-energy sources spanning our galaxy and beyond. Seth Digel, a senior staff scientist at SLAC National Accelerator Laboratory, describes the scene. The bright, constant gamma-ray radiance of the Milky Way is accentuated by intense, days-long flares produced by near-light-speed jets, emanating from supermassive black holes nestled in the cores of distant galaxies. These awe-inspiring eruptions, visible from any point in the sky, transpired millions to billions of years ago, and their light is only now reaching Fermi as we witness this cosmic spectacle. Gamma rays, the most energetic form of light, take center stage in this captivating movie showcasing the intensity of gamma rays with energies surpassin...

Supernova Encore: NASA Webb spots a second lensed supernova in the galaxy MACS J0138.0-2155 during observations.

  The NASA James Webb Space Telescope recently detected a multiply-imaged supernova in the distant galaxy MRG-M0138. Captured by the Webb NIRCam, two supernova images are visible, with an anticipation of a third appearing by 2035. The image uses color-coding: blue for 1.15 and 1.5 microns, green for 2.0 and 2.77 microns, and red for 3.56 and 4.44 microns. Credit goes to NASA, ESA, CSA, STScI, Justin Pierel, and Andrew Newman. In November 2023, the telescope also observed the gravitational lensing effect in the massive galaxy cluster MACS J0138.0-2155, distorting and magnifying the appearance of the distant galaxy MRG-M0138 into five distinct images. Astronomers announced in 2019 that a supernova occurred within the galaxy MRG-M0138, as revealed by NASA's Hubble Space Telescope images from 2016. Astonishingly, when another group analyzed the 2023 Webb images, they found a second supernova in the same galaxy, seven years later. This revelation, shared by Justin Pierel (NASA Einstein ...

UGC 8091 was imaged using data from Hubble's Wide Field Camera 3 and Advanced Camera.

  The captivating image of the dwarf irregular galaxy, UGC 8091, is a result of combining data from NASA's Hubble Space Telescope's Wide Field Camera 3 and Advanced Camera for Surveys. Depicting a billion stars, the galaxy resembles a dazzling snow globe in this festive snapshot, beautifully captured by the collaborative efforts of NASA and the European Space Agency (ESA). Situated about 7 million light-years away in the Virgo constellation, the dwarf galaxy UGC 8091 earns its classification as an "irregular galaxy" due to its absence of a distinct spiral or elliptical structure. Unlike more ordered counterparts, the stars within this cosmic assembly resemble a radiant entanglement of string lights rather than a traditional galaxy. Irregular galaxies like UGC 8091 may acquire their peculiar shapes through tumultuous internal processes or interactions with neighboring galaxies, resulting in a diverse range of sizes and configurations, such as the diffuse scatter of sta...

Telescopes Illuminate the Enchanting 'Christmas Tree Cluster' in NGC 2264.

  This captivating image of NGC 2264, known as the "Christmas Tree Cluster," reveals a celestial tree formed by the radiant lights of young stars. Situated approximately 2,500 light-years away in our Milky Way, NGC 2264 comprises stars aged between one and five million years. Differing in size, these stars vary from smaller ones, less than a tenth of the Sun's mass, to larger counterparts containing about seven solar masses. The composite image combines X-ray, optical, and infrared data, showcasing the cosmic beauty of this stellar congregation. In this newly composed image, the Christmas tree motif is accentuated through strategic color choices and rotation. The twinkling blue and white lights, captured in an animated version of the picture, represent youthful stars emitting X-rays, detected by NASA’s Chandra X-ray Observatory. Optical data from the National Science Foundation’s WIYN 0.9-meter telescope paints the nebula's gas in green, mimicking the "pine needl...

Discovered by NASA, some icy exoplanets are likely to have habitable oceans and geysers.

  The NASA study broadens the exploration for extraterrestrial life by proposing that 17 exoplanets may possess oceans of liquid water beneath icy surfaces, a crucial component for supporting life. These oceans could potentially give rise to geysers, as calculated by the science team in a groundbreaking effort, marking the first estimates of geyser activity on these distant worlds. Notably, two of these exoplanets are identified as being close enough for potential observation of these eruptions through telescopes, adding a new dimension to the search for signs of life beyond our solar system. While the conventional quest for extraterrestrial life centers on exoplanets within a star's habitable zone, where temperatures permit liquid water, a NASA study highlights the possibility of distant and cold exoplanets harboring oceans beneath icy crusts through sufficient internal heating. Drawing parallels to our solar system, moons like Europa (Jupiter's moon) and Enceladus (Saturn...

Hubble's Gaze Unveils the Enigmatic Beauty of a Late-Type Galaxy.

  The NASA Hubble Space Telescope unveils celestial wonders, and among them is NGC 2814, an irregular galaxy residing 85 million light-years away. Captured by Hubble's Advanced Camera for Surveys, the image portrays NGC 2814 as a seemingly isolated stroke of brilliance on a cosmic canvas. However, appearances can deceive, for within this cosmic artwork lies a tale of galactic neighbors and a misunderstood astronomical terminology. NGC 2814 and Its Galactic Neighbors. In the captured image, NGC 2814 stands alone, but astral proximity reveals its companions. Three neighboring galaxies—NGC 2820, a side-on spiral galaxy; IC 2458, an irregular galaxy; and NGC 2805, a face-on non-barred spiral galaxy—form a celestial quartet known as Holmberg 124. Together, they dance through the vastness of space, challenging the perception of NGC 2814's solitude. The Enigma of "Late-Type" and "Early-Type" Galaxies. Astronomy introduces the terms "late-type" for spiral ...

Webb identified the smallest free-floating brown dwarf in the central portion of the star cluster IC 348.

Brown dwarfs exist in a celestial realm, bridging the boundary between stars and planets. These enigmatic objects undergo a star-like formation, accumulating sufficient density to succumb to gravitational collapse. However, unlike stars, they never reach the critical density and temperature required to initiate hydrogen fusion, preventing them from becoming radiant stars. At the lower end of the mass spectrum, some brown dwarfs share similarities with giant planets, boasting masses just a few times that of Jupiter. This delicate balance between stellar and planetary characteristics renders brown dwarfs a fascinating category in the cosmic tapestry, offering unique insights into the diverse processes shaping celestial bodies. The quest to unveil the smallest objects capable of forming in a manner akin to stars has led astronomers on a scientific exploration. Utilizing NASA's James Webb Space Telescope, a dedicated team has recently pinpointed a new record-holder—a diminutive, free-f...

Seeing, Believing: 15 Years of Captivating Exoplanet Images Unveiled Through Direct Imaging.

  French astronomers, employing the European Southern Observatory's Very Large Telescope, made a groundbreaking discovery of the giant exoplanet Beta Pictoris b. This achievement culminated in a remarkable direct image capturing the celestial body. Initially, a captivating dusty disk and observable tracks of "exocomets" hinted at the planetary presence. However, the defining moment occurred 15 years ago when Beta Pictoris unveiled an iconic image—a direct depiction of a planet orbiting a distant star. Despite the challenge posed by the luminous, young star located 63 light-years away, the astronomers, aided by the observatory's telescope, successfully isolated the planet's faint light. The resulting image, a mere pixelated dot, marked a pivotal moment, opening a new frontier in the realm of direct imaging in astrophysics. Marie Ygouf, a researcher specializing in direct imaging of exoplanets at NASA's Jet Propulsion Laboratory in Southern California, vividly r...

NASA's Perseverance rover reveals ancient history of Mars' lake.

  Celebrating its 1,000th day on Mars, NASA's Perseverance rover has successfully explored an ancient river delta on the Red Planet, uncovering crucial evidence of a prehistoric lake within Jezero Crater. Throughout its mission, the rover has diligently collected 23 samples, shedding light on the geological history of this Martian region. Notably, the sample named "Lefroy Bay" boasts an abundance of fine-grained silica, a substance recognized for preserving ancient fossils on Earth. Another sample, "Otis Peak," contains a significant quantity of phosphate, often linked to life as we understand it. Both samples are rich in carbonate, providing a record of the environmental conditions during the rock's formation. These groundbreaking discoveries were presented at the American Geophysical Union fall meeting in San Francisco on Tuesday, December 12. Image of Jezero Crater. This composite image of Mars' Jezero Crater combines the crater's visual data with...