Thursday, November 14, 2024

APOD - IC 348 and Barnard 3

Astronomy Picture of the Day

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2024 November 14
See Explanation.  Clicking on the picture will download  the highest resolution version available.

IC 348 and Barnard 3
Image Credit & Copyright: Ashraf Abu Sara

Explanation: A great nebulous region near bright star omicron Persei offers this study in cosmic contrasts. Captured in the telescopic frame the colorful complex of dust, gas, and stars spans about 3 degrees on the sky along the edge of the Perseus molecular cloud some 1000 light-years away. Surrounded by a bluish halo of dust reflected starlight, omicron Persei itself is just left of center. Immediately below it lies the intriguing young star cluster IC 348 recently explored by the James Webb Space Telescope. In silhouette against the diffuse reddish glow of hydrogen gas, dark and obscuring interstellar dust cloud Barnard 3 is at upper right. Of course the cosmic dust also tends to hide newly formed stars and young stellar objects or protostars from prying optical telescopes. At the Perseus molecular cloud's estimated distance, this field of view would span about 50 light-years.

Tomorrow's picture: pixels in space


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Wednesday, November 13, 2024

APOD - Barred Spiral Galaxy NGC 1365 from Webb

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2024 November 13
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Barred Spiral Galaxy NGC 1365 from Webb
Image Credit: NASA, ESA, CSA, Janice Lee (NOIRLab) - Processing: Alyssa Pagan (STScI)

Explanation: A mere 56 million light-years distant toward the southern constellation Fornax, NGC 1365 is an enormous barred spiral galaxy about 200,000 light-years in diameter. That's twice the size of our own barred spiral Milky Way. This sharp image from the James Webb Space Telescope's Mid-Infrared Instrument (MIRI) reveals stunning details of this magnificent spiral in infrared light. Webb's field of view stretches about 60,000 light-years across NGC 1365, exploring the galaxy's core and bright newborn star clusters. The intricate network of dusty filaments and bubbles is created by young stars along spiral arms winding from the galaxy's central bar. Astronomers suspect the gravity field of NGC 1365's bar plays a crucial role in the galaxy's evolution, funneling gas and dust into a star-forming maelstrom and ultimately feeding material into the active galaxy's central, supermassive black hole.

Tomorrow's picture: the light, the dark, and the dusty


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Tuesday, November 12, 2024

APOD - NGC 6888: The Crescent Nebula

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2024 November 12
A starfield is shown with a unusual textured nebula  in the center colored in brown with blue trimmings. Diffuse  red nebula appear around the edges. In the center is an  opaque brown object.   Please see the explanation for more detailed information.

NGC 6888: The Crescent Nebula
Image Credit & Copyright: Team ARO

Explanation: How was the Crescent Nebula created? Looking like an emerging space cocoon, the Crescent Nebula, visible in the center of the featured image, was created by the brightest star in its center. A leading progenitor hypothesis has the Crescent Nebula beginning to form about 250,000 years ago. At that time, the massive central star had evolved to become a Wolf-Rayet star (WR 136), shedding its outer envelope in a strong stellar wind, ejecting the equivalent of our Sun's mass every 10,000 years. This wind impacted surrounding gas left over from a previous phase, compacting it into a series of complex shells, and lighting it up. The Crescent Nebula, also known as NGC 6888, lies about 4,700 light-years away in the constellation of Cygnus. Star WR 136 will probably undergo a supernova explosion sometime in the next million years.

Jigsaw Challenge: Astronomy Puzzle of the Day
Tomorrow's picture: open space


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Sunday, November 10, 2024

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APOD - Valles Marineris: The Grand Canyon of Mars

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2024 November 10
A picture of Mars is shown as a large orange globe.  Across the center of the planet a long canyon is visible.   Please see the explanation for more detailed information.

Valles Marineris: The Grand Canyon of Mars
Image Credit: NASA, USGS, Viking Project

Explanation: The largest canyon in the Solar System cuts a wide swath across the face of Mars. Named Valles Marineris, the grand valley extends over 3,000 kilometers long, spans as much as 600 kilometers across, and delves as much as 8 kilometers deep. By comparison, the Earth's Grand Canyon in Arizona, USA is 800 kilometers long, 30 kilometers across, and 1.8 kilometers deep. The origin of the Valles Marineris remains unknown, although a leading hypothesis holds that it started as a crack billions of years ago as the planet cooled. Several geologic processes have been identified in the canyon. The featured mosaic was created from over 100 images of Mars taken by Viking Orbiters in the 1970s.

Tomorrow's picture: comet tails


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Saturday, November 9, 2024

APOD - Neptune at Night

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2024 November 9
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Neptune at Night
Image Credit & Copyright: Voyager 2, NASA

Explanation: Ice giant Neptune is faint in Earth's night sky. Some 30 times farther from the Sun than our fair planet, telescopes are needed to catch a glimpse of the dim and distant world. This dramatic view of Neptune's night just isn't possible for telescopes in the vicinity of planet Earth though. Peering out from the inner Solar System they can only bring Neptune's day side into view. In fact this night side image with Neptune's slender crescent next to the crescent of its large moon Triton was captured by Voyager 2. Launched from planet Earth in 1977 the Voyager 2 spacecraft made a close fly by of the Solar System's outermost planet in 1989, looking back on Neptune at night as the robotic spacecraft continued its voyage to interstellar space.

Tomorrow's picture: Valles Marineris


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Friday, November 8, 2024

APOD - Helping Hand in Cassiopeia

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2024 November 8
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Helping Hand in Cassiopeia
Image Credit & Copyright: Francesco Radici

Explanation: Drifting near the plane of our Milky Way galaxy these dusty molecular clouds seem to extend a helping hand on a cosmic scale. Part of a local complex of star-forming interstellar clouds they include LDN 1358, 1357, and 1355 from American astronomer Beverly Lynds' 1962 Catalog of Dark Nebulae. Presenting a challenging target for astro-imagers, the obscuring dark nebulae are nearly 3,000 light-years away, toward rich starfields in the northern constellation Cassiopeia. At that distance, this deep, telescopic field of view would span about 80 light-years.

Tomorrow's picture: light-weekend


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Thursday, November 7, 2024

APOD - Shell Galaxies in Pisces

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2024 November 7
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Shell Galaxies in Pisces
Image Credit & Copyright: George Williams

Explanation: This spectacular intergalactic skyscape features Arp 227, a curious system of galaxies from the 1966 Atlas of Peculiar Galaxies. Some 100 million light-years distant within the boundaries of the constellation Pisces, Arp 227 consists of the two galaxies prominent above and left of center, the shell galaxy NGC 474 and its blue, spiral-armed neighbor NGC 470. The readily apparent shells and star streams of NGC 474 are likely tidal features originating from the accretion of another smaller galaxy during close gravitational encounters that began over a billion years ago. The large galaxy on the bottom righthand side of the deep image, NGC 467, appears to be surrounded by faint shells and streams too, evidence of another merging galaxy system. Intriguing background galaxies are scattered around the field that also includes spiky foreground stars. Of course, those stars lie well within our own Milky Way Galaxy. The telescopic field of view spans 25 arc minutes or just under 1/2 degree on the sky.

Tomorrow's picture: pixels in space


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Wednesday, November 6, 2024

APOD - Comet Tsuchinshan-Atlas over the Dolomites

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2024 November 6
A town is shown in the foreground surrounded by tall  mountains with even taller mountains in the distance. Above   them all is a bright white streak that is a comet with both  a tail and an anti-tail. High above are stars in the night  sky.  Please see the explanation for more detailed information.

Comet Tsuchinshan-Atlas over the Dolomites
Credit & Copyright: Alessandra Masi

Explanation: Comet Tsuchinshan-Atlas is now headed back to the outer Solar System. The massive dusty snowball put on quite a show during its trip near the Sun, resulting in many impressive pictures from planet Earth during October. The featured image was taken in mid-October and shows a defining visual feature of the comet -- its impressive anti-tail. The image captures Comet C/2023 A3 (Tsuchinshan–ATLAS) with impressively long dust and ion tails pointing up and away from the Sun, while the strong anti-tail -- composed of more massive dust particles -- trails the comet and points down and (nearly) toward the recently-set Sun. In the foreground is village of Tai di Cadore, Italy, with the tremendous Dolomite Mountains in the background. Another comet, C/2024 S1 (ATLAS), once a candidate to rival Comet Tsuchinshan-Atlas in brightness, broke up last week during its close approach to our Sun.

Growing Gallery: Comet Tsuchinshan-ATLAS in 2024
Tomorrow's picture: open space


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Tuesday, November 5, 2024

APOD - Milky Way over Easter Island

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2024 November 5
A grassy hill appears in the foreground with tall statues   of human heads embeddd. High overhead the central band of the   Milky Way galaxy crosses horizontally. Above the Milky Way is  a dark sky filled with stars.   Please see the explanation for more detailed information.

Milky Way over Easter Island
Credit & Copyright: Josh Dury

Explanation: Why were the statues on Easter Island built? No one is sure. What is sure is that over 900 large stone statues called moais exist there. The Rapa Nui (Easter Island) moais stand, on average, over twice as tall as a person and have over 200 times as much mass. It is thought that the unusual statues were created about 600 years ago in the images of local leaders of a vibrant and ancient civilization. Rapa Nui has been declared by UNESCO to a World Heritage Site. Pictured here, some of the stone giants were imaged last month under the central band of our Milky Way galaxy. Previously unknown moais are still being discovered.

Alternative Multi-APOD Front Page: MyUniverseHub.com
Tomorrow's picture: comet mountain


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Monday, November 4, 2024

APOD - M42: The Great Nebula in Orion

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2024 November 4
A starfield is shown with a nebula glowing in red, purple,  and blue. Dark brown gas is also seen on the lower left.   A small cluster of stars appears in the center.  Please see the explanation for more detailed information.

M42: The Great Nebula in Orion
Credit & Copyright: FĂ©nyes LĂ³rĂ¡nd

Explanation: The Great Nebula in Orion, an immense, nearby starbirth region, is probably the most famous of all astronomical nebulas. Here, glowing gas surrounds hot young stars at the edge of an immense interstellar molecular cloud only 1500 light-years away. In the featured deep image in assigned colors highlighted by emission in oxygen and hydrogen, wisps and sheets of dust and gas are particularly evident. The Great Nebula in Orion can be found with the unaided eye near the easily identifiable belt of three stars in the popular constellation Orion. In addition to housing a bright open cluster of stars known as the Trapezium, the Orion Nebula contains many stellar nurseries. These nurseries contain much hydrogen gas, hot young stars, proplyds, and stellar jets spewing material at high speeds. Also known as M42, the Orion Nebula spans about 40 light years and is located in the same spiral arm of our Galaxy as the Sun.

Tomorrow's picture: galaxy watchers


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Sunday, November 3, 2024

APOD - Jupiter Abyss

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2024 November 3
Swirling clouds on the planet Jupiter are pictured, mostly  in white, tan, and light blue. A dark spot appears in the center  surrounded by swirling white and blue clouds.   Please see the explanation for more detailed information.

Jupiter Abyss
Image Credit: NASA, Juno, SwRI, MSSS; Processing & License: Gerald Eichstädt & Sean Doran

Explanation: What's that black spot on Jupiter? No one is sure. During one pass of NASA's Juno over Jupiter, the robotic spacecraft imaged an usually dark cloud feature informally dubbed the Abyss. Surrounding cloud patterns show the Abyss to be at the center of a vortex. Since dark features on Jupiter's atmosphere tend to run deeper than light features, the Abyss may really be the deep hole that it appears -- but without more evidence that remains conjecture. The Abyss is surrounded by a complex of meandering clouds and other swirling storm systems, some of which are topped by light colored, high-altitude clouds. The featured image was captured in 2019 while Juno passed only about 15,000 kilometers above Jupiter's cloud tops. The next close pass of Juno near Jupiter will be in about three weeks.

Tomorrow's picture: orion the great


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Saturday, November 2, 2024

APOD - Saturn at Night

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2024 November 2
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Saturn at Night
Image Credit: NASA, JPL-Caltech, Space Science Institute, Mindaugas Macijauskas

Explanation: Saturn is bright in Earth's night skies. Telescopic views of the outer gas giant planet and its beautiful rings often make it a star at star parties. But this stunning view of Saturn's rings and night side just isn't possible from telescopes in the vicinity of planet Earth. Peering out from the inner Solar System they can only bring Saturn's day side into view. In fact, this image of Saturn's slender sunlit crescent with night's shadow cast across its broad and complex ring system was captured by the Cassini spacecraft. A robot spacecraft from planet Earth, Cassini called Saturn orbit home for 13 years before it was directed to dive into the atmosphere of the gas giant on September 15, 2017. This magnificent mosaic is composed of frames recorded by Cassini's wide-angle camera only two days before its grand final plunge. Saturn's night will not be seen again until another spaceship from Earth calls.

Tomorrow's picture: gaze into the abyss


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Friday, November 1, 2024

APOD - Spiral Galaxy NGC 6744

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2024 November 1
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Spiral Galaxy NGC 6744
Image Credit & Copyright: John Hayes

Explanation: Big, beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way. It lies some 30 million light-years distant in the southern constellation Pavo but appears as only a faint smudge in the eyepiece of a small telescope. We see the disk of the nearby island universe tilted towards our line of sight in this remarkably deep and detailed galaxy portrait, a telescopic image that spans an area about the angular size of a full moon. In it, the giant galaxy's elongated yellowish core is dominated by the light from old, cool stars. Beyond the core, grand spiral arms are filled with young blue star clusters and speckled with pinkish star forming regions. An extended arm sweeps past smaller satellite galaxy NGC 6744A at the upper left. NGC 6744's galactic companion is reminiscent of the Milky Way's satellite galaxy the Large Magellanic Cloud.

Tomorrow's picture: light-weekend


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Thursday, October 31, 2024

APOD - Rigel and the Witch Head Nebula

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2024 October 31
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Rigel and the Witch Head Nebula
Image Credit & Copyright: Simone Curzi

Explanation: By starlight, this eerie visage shines in the dark with a crooked profile evoking its popular name, the Witch Head Nebula. In fact, this entrancing telescopic portrait gives the impression that a witch has fixed her gaze on Orion's bright supergiant star Rigel. More formally known as IC 2118, the Witch Head Nebula spans about 50 light-years and is composed of interstellar dust grains reflecting Rigel's starlight. The color of the Witch Head Nebula is caused not only by Rigel's intense blue light, but because the dust grains scatter blue light more efficiently than red. The same physical process causes Earth's daytime sky to appear blue, although the scatterers in Earth's atmosphere are molecules of nitrogen and oxygen. Rigel and this dusty cosmic crone are about 800 light-years away. You may still see a few witches in your neighborhood tonight though, so have a safe and Happy Halloween!

Tomorrow's picture: pixels in space


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Wednesday, October 30, 2024

APOD - NGC 7635: The Bubble Nebula

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2024 October 30
A starfield is shown with a big light bubble in   the center. A bright star is toward the upper right in  the translucent bubble. To some, the bubble may resemble  a skull.  Please see the explanation for more detailed information.

NGC 7635: The Bubble Nebula
Credit & Copyright: Chad Leader

Explanation: What created this huge space bubble? Blown by the wind from a star, this tantalizing, head-like apparition is cataloged as NGC 7635, but known simply as the Bubble Nebula. The featured striking view utilizes a long exposure to reveal the intricate details of this cosmic bubble and its environment. Although it looks delicate, the 10 light-year diameter bubble offers evidence of violent processes at work. Seen here above and right of the Bubble's center, a bright hot star is embedded in the nebula's reflecting dust. A fierce stellar wind and intense radiation from the star, which likely has a mass 10 to 20 times that of the Sun, has blasted out the structure of glowing gas against denser material in a surrounding molecular cloud. The intriguing Bubble Nebula lies a mere 11,000 light-years away toward the boastful constellation Cassiopeia.

Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
Tomorrow's picture: All Hallow's Eve


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Tuesday, October 29, 2024

APOD - NGC 602: Stars Versus Pillars from Webb

Astronomy Picture of the Day

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2024 October 29
A starfield is shown featuring many stars in the center  and many pillars of interstellar dust around the edges  pointing toward the center. The main image is in infrared  light, and a rollover image from Hubble shows the same  scene in visible light.  Please see the explanation for more detailed information.

NGC 602: Stars Versus Pillars from Webb
Credit: ESA/Webb, NASA & CSA, P. Zeidler, E. Sabbi, A. Nota, M. Zamani (ESA/Webb)

Explanation: The stars are destroying the pillars. More specifically, some of the newly formed stars in the image center are emitting light so energetic that is evaporating the gas and dust in the surrounding pillars. Simultaneously, the pillars themselves are still trying to form new stars. The whole setting is the star cluster NGC 602, and this new vista was taken by the Webb Space Telescope in multiple infrared colors. In comparison, a roll-over image shows the same star cluster in visible light, taken previously by the Hubble Space Telescope. NGC 602 is located near the perimeter of the Small Magellanic Cloud (SMC), a small satellite galaxy of our Milky Way galaxy. At the estimated distance of the SMC, the featured picture spans about 200 light-years. A tantalizing assortment of background galaxies are also visible -- mostly around the edges -- that are at least hundreds of millions of light-years beyond.

Tomorrow's picture: head space


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Monday, October 28, 2024

[27+] Sculptures Contemporaines Abstraites Uniques Originales - ..

21+

APOD - STEVE: A Glowing River over France

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2024 October 28
A night sky is shown with a bright red band running  overhead. Above the red band is a diffuse red glow.  A path through a grassy filed is in the foreground  with a path going out toward the horizon.   Please see the explanation for more detailed information.

STEVE: A Glowing River over France
Credit & Copyright: Louis LEROUX-GÉRÉ

Explanation: Sometimes a river of hot gas flows over your head. In this case the river created a Strong Thermal Emission Velocity Enhancement (STEVE) that glowed bright red, white, and pink. Details of how STEVEs work remain a topic of research, but recent evidence holds that their glow results from a fast-moving river of hot ions flowing over a hundred kilometers up in the Earth's atmosphere: the ionosphere. The more expansive dull red glow might be related to the flowing STEVE, but alternatively might be a Stable Auroral Red (SAR) arc, a more general heat-related glow. The featured picture, taken earlier this month in CĂ´te d'Opale, France, is a wide-angle digital composite made as the STEVE arc formed nearly overhead. Although the apparition lasted only a few minutes, this was long enough for the quick-thinking astrophotographer to get in the picture -- can you find him?

Tomorrow's picture: webb stars


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Sunday, October 27, 2024

APOD - LDN 43: The Cosmic Bat Nebula

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2024 October 27
A starfield is shown with a large brown dust nebula  in the center. The nebula appears, to some, to be shaped  like a bat. One of the stars in the dust nebula even appears  to be the eye of the bat.   Please see the explanation for more detailed information.

LDN 43: The Cosmic Bat Nebula
Credit & Copyright: Mark Hanson and Mike Selby; Text: Michelle Thaller (NASA's GSFC)

Explanation: What is the most spook-tacular nebula in the galaxy? One contender is LDN 43, which bears an astonishing resemblance to a vast cosmic bat flying amongst the stars on a dark Halloween night. Located about 1400 light years away in the constellation Ophiuchus, this molecular cloud is dense enough to block light not only from background stars, but from wisps of gas lit up by the nearby reflection nebula LBN 7. Far from being a harbinger of death, this 12-light year-long filament of gas and dust is actually a stellar nursery. Glowing with eerie light, the bat is lit up from inside by dense gaseous knots that have just formed young stars.

Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)
Tomorrow's picture: amazing STEVE


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Saturday, October 26, 2024

APOD - Phantoms in Cassiopeia

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2024 October 26
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Phantoms in Cassiopeia
Image Credit & Copyright: Christophe Vergnes, Hervé Laur

Explanation: These brightly outlined flowing shapes look ghostly on a cosmic scale. A telescopic view toward the constellation Cassiopeia, the colorful skyscape features the swept-back, comet-shaped clouds IC 59 (left) and IC 63. About 600 light-years distant, the clouds aren't actually ghosts. They are slowly disappearing though, under the influence of energetic radiation from hot, luminous star gamma Cas. Gamma Cas is physically located only 3 to 4 light-years from the nebulae and lies just above the right edge of the frame. Slightly closer to gamma Cas, IC 63 is dominated by red H-alpha light emitted as hydrogen atoms ionized by the hot star's ultraviolet radiation recombine with electrons. Farther from the star, IC 59 shows less H-alpha emission but more of the characteristic blue tint of dust reflected star light. The field of view spans over 1 degree or 10 light-years at the estimated distance of the interstellar apparitions.

Tomorrow's picture: bats in space


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Friday, October 25, 2024

[47+] Caligraphie Asmaul Husna - Web`s Blog: Lirik Asmaul Husna Hijjaz | ..

24+

APOD - Globular Star Cluster NGC 6752

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2024 October 25
See Explanation.  Clicking on the picture will download  the highest resolution version available.

Globular Star Cluster NGC 6752
Image Credit & Copyright: Massimo Di Fusco, Aygen Erkaslan

Explanation: Some 13,000 light-years away toward the southern constellation Pavo, the globular star cluster NGC 6752 roams the halo of our Milky Way galaxy. Over 10 billion years old, NGC 6752 follows clusters Omega Centauri, 47 Tucanae, and Messier 22 as the fourth brightest globular in planet Earth's night sky. It holds over 100 thousand stars in a sphere about 100 light-years in diameter. Telescopic explorations of NGC 6752 have found that a remarkable fraction of the stars near the cluster's core, are multiple star systems. They also reveal the presence of blue straggle stars, stars which appear to be too young and massive to exist in a cluster whose stars are all expected to be at least twice as old as the Sun. The blue stragglers are thought to be formed by star mergers and collisions in the dense stellar environment at the cluster's core. This sharp color composite also features the cluster's ancient red giant stars in yellowish hues. (Note: The bright, spiky blue star about 8 o'clock from the cluster center is a foreground star along the line-of-sight to NGC 6752)

Tomorrow's picture: pixels in space


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