Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 September 1 The Great Globular Cluster in Hercules Image Credit &Copyright: Serge Brunier, Jean-François Bax, David VernetOCA/C2PU Explanation: In 1716,English astronomerEdmond Halleynoted, "This is but a little Patch, but it shows itself to the naked Eye, whenthe Sky is serene and the Moon absent."Of course, M13is now less modestly recognized as the Great Globular Cluster inHercules, one of the brightestglobularstar clusters in the northern sky.Sharp telescopic views likethis onereveal the spectacular cluster'shundreds of thousands of stars.At a distance of 25,000 light-years, thecluster stars crowdinto a region 150 light-years in diameter.Approaching the cluster core, upwards of 100 stars could be containedin a cube just 3 light-years on a side.For comparison, theclosest star to the Sun is over4 light-years away.The remarkable range of brightnessrecorded in this image follows stars into the dense cluster core. Tomorrow's picture: wisdom in a flower<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA...

APOD: 2023 August 30 - Full Moons of August Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 30 Full Moons of August Image Credit &Copyright: Gianni Tumino Explanation: Near perigee,the closest point in its almost moonthly orbit,a Full Moon rose as the Sun set on August 1.Its brighter than average lunar disk was captured in thisdramatic moonrise sequence over dense cloud banks along theeastern horizon from Ragusa, Sicily.Illuminating night skies around planet Earth it was the secondsupermoon of 2023.Yet again near perigee, the third supermoon of 2023 will alsoshine on an August night.Rising as the Sun sets tonightthis second Full Moon in August will be known to some as a Blue Moon,even though scattered sunlight gives the lunar disk a reddened hue.Defined as the second full moon in a calendar month,blue moonsoccur only once every 2 or 3 years.That's because lunar phases take 29.5 days,almost a calendar month, to go through a complete cycle.Tonight an August Blue Moonwill find itself beside bright planet Saturn. Tomorrow's picture: the Crew-7 nebula<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors &...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 31 The Crew-7 Nebula Image Credit &Copyright: Michael Seeley Explanation: Not theJames Webb Space Telescope'slatest view of a distant galactic nebula,this illuminated cloud of gas and dust dazzledearly morning spacecoast skygazers on August 26.The snapshot was taken about 2 minutes after the launch ofof a Falcon 9 rocket onthe SpaceX Crew-7 mission,the seventh commercial crew rotation mission for the InternationalSpace Station.It captures drifting plumes and exhaust from the separatedfirst and second stage illuminated against the still dark skies.Near the center of the image, within the ragged blueish ring,are two bright points of light.The lower one is the second stage of the rocketcarrying 4 humans to space in a Crew Dragon spacecraft.The bright point above is the Falcon 9first stage boosterorienting itself for the trip backto Landing Zone-1at Cape Canaveral, planet Earth. Tomorrow's picture: a great little patch<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 30 Full Moons of August Image Credit &Copyright: Gianni Tumino Explanation: Near perigee,the closest point in its almost moonthly orbit,a Full Moon rose as the Sun set on August 1.Its brighter than average lunar disk was captured in thisdramatic moonrise sequence over dense cloud banks along theeastern horizon from Ragusa, Sicily.Illuminating night skies around planet Earth it was the secondsupermoon of 2023.Yet again near perigee, the third supermoon of 2023 will alsoshine on an August night.Rising as the Sun sets tonightthis second Full Moon in August will be known to some as a Blue Moon,even though scattered sunlight gives the lunar disk a reddened hue.Defined as the second full moon in a calendar month,blue moonsoccur only once every 2 or 3 years.That's because lunar phases take 29.5 days,almost a calendar month, to go through a complete cycle.Tonight an August Blue Moonwill find itself beside bright planet Saturn. Tomorrow's picture: the Crew-7 nebula<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry...

APOD: 2023 August 25 - A Season of Saturn Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 25 A Season of Saturn Image Credit &Copyright: Andy Casely Explanation: Ringed planet Saturnwill be at its 2023 opposition,opposite the Sun in Earth's skies, on August 27.While that puts the sixth planet from the Sun at itsbrightest and well-placedfor viewing, its beautiful ring system isn'tvisible to the unaided eye.Still, this sequence of telescopic images taken a yearapart over the last six yearsfollows both Saturn and rings as seen from inner planet Earth.The gas giant's ring plane tiltsfrom most open in 2018 to approaching edge-on in 2023 (top to bottom).That's summer to nearly the autumnequinox for Saturn's northern hemisphere.In the sharp planetary portraits Saturn's northernhexagon and a largestorm system are clearly visible in 2018.In 2023 ice moon Tethysis transiting, casting its shadow acrosssouthern hemisphere cloud bands whileSaturn's cold blue south pole is emergingfrom almost a decade of winter darkness. Tomorrow's picture: crescents of Venus<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 26 Crescents of Venus Image Credit &Copyright: Roberto Ortu Explanation: Just as the Moon goesthrough phases, Venus' visible sunlit hemispherewaxes and wanes.This sequence oftelescopicimagesillustrates the steady changes for Venus duringits recent 2023 apparition as our evening star.Gliding along its interior orbit between Earth and Sun, Venus growslarger during that period because it is approaching planet Earth.Its crescent narrows though, as the inner planet swings closer to ourline-of-sight to the Sun.Closest to the Earth-Sun line but passing about 8 degrees south of theSun, on August 13 Venus reached its (non-judgmental)inferior conjunction.And now Venus shines above the eastern horizon inpredawn skies, completing its transition to planet Earth'smorning star.On August 21, NASA's Parker Solar Probe completed its sixthgravity assist flyby of Venus, using the encounter to maneuverthe probe toward itsclosest approach yet to the Sun. Tomorrow's picture: Three Galaxies and a Comet<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service...

APOD: 2023 August 24 - Meteors along the Milky Way Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 24 Meteors along the Milky Way Image Credit &Copyright: Ali Hosseini Nezhad Explanation: Under darkand mostly moonless night skies, manydenizens of planet Earthwere able to watch this year's Perseid meteor shower.Seen from a grassy hillside from Shiraz, Iran thesePerseid meteors streakalong the northern summer Milky Waybefore dawn on Sunday, August 13.Frames used to construct the composited imagewere captured near theactive annual meteor shower's peakbetween 02:00 AM and 04:30 AM local time.Not in this night skyscape, the shower's radiant inthe heroic constellation Perseus is far above the camera's fieldof view.But fans of northern summer nightscan still spota familiar asterism.Formed by bright stars Deneb, Vega, and Altair, theSummer Trianglespans the luminous band of the Milky Way. Tomorrow's picture: seasons of Saturn<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA /GSFC,NASA ScienceActivation& Michigan Tech. U.

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 25 A Season of Saturn Image Credit &Copyright: Andy Casely Explanation: Ringed planet Saturnwill be at its 2023 opposition,opposite the Sun in Earth's skies, on August 27.While that puts the sixth planet from the Sun at itsbrightest and well-placedfor viewing, its beautiful ring system isn'tvisible to the unaided eye.Still, this sequence of telescopic images taken a yearapart over the last six yearsfollows both Saturn and rings as seen from inner planet Earth.The gas giant's ring plane tiltsfrom most open in 2018 to approaching edge-on in 2023 (top to bottom).That's summer to nearly the autumnequinox for Saturn's northern hemisphere.In the sharp planetary portraits, Saturn's northernhexagon and a largestorm system are clearly visible in 2018.In 2023, ice moon Tethysis transiting, casting its shadow acrosssouthern hemisphere cloud bands, whileSaturn's cold blue south pole is emergingfrom almost a decade of winter darkness. Tomorrow's picture: phases of Venus<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 24 Meteors along the Milky Way Image Credit &Copyright: Ali Hosseini Nezhad Explanation: Under darkand mostly moonless night skies, manydenizens of planet Earthwere able to watch this year's Perseid meteor shower.Seen from a grassy hillside from Shiraz, Iran thesePerseid meteors streakalong the northern summer Milky Waybefore dawn on Sunday, August 13.Frames used to construct the composited imagewere captured near theactive annual meteor shower's peakbetween 02:00 AM and 04:30 AM local time.Not in this night skyscape, the shower's radiant inthe heroic constellation Perseus is far above the camera's fieldof view.But fans of northern summer nightscan still spota familiar asterism.Formed by bright stars Deneb, Vega, and Altair, theSummer Trianglespans the luminous band of the Milky Way. Tomorrow's picture: seasons of Saturn<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA /GSFC,NASA ScienceActivation& Michigan Tech. U.

APOD: 2023 August 18 - Northern Pluto Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 18 Northern Pluto Image Credit:NASA,Johns Hopkins Univ./APL,Southwest Research Institute Explanation: Gaze acrossthe frozen canyons of northern Pluto in this contrast enhanced color scene.The image data used to construct it was acquiredin July 2015 by the New Horizons spacecraft as it madethe first reconnaissance flight throughthe remote Pluto system six billion kilometers from the Sun.Now knownas Lowell Regio, the region wasnamed for Percival Lowell, founder of the Lowell Observatory.Also famous for his speculation that there were canals on Mars,Lowell started the search that ultimatelyled to Pluto's discoveryin 1930 byClyde Tombaugh.In this frame Pluto'sNorth Poleis above and left of center.The pale bluish floor of the broad canyon on the left is about 70kilometers (45 miles) wide, running vertically toward the south.Higher elevations take on a yellowish hue.New Horizon's measurementswere used to determine that in addition to nitrogen ice,methane ice is abundant across Lowell Regio.So far, Pluto is the onlySolar System world named by an 11-year-old girl. Tomorrow's picture: ringed ice giant<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 19 Ringed Ice Giant Neptune Image Credit: NASA,ESA,CSA,STScI,NIRCam Explanation: Ringed ice giant Neptunelies near the center of this sharpnear-infrared image from theJames Webb Space Telescope.The dim and distant world is thefarthest planet from the Sun,about 30 times farther away than planet Earth.But in the stunning Webb view, the planet's dark and ghostly appearanceis due to atmospheric methane that absorbs infrared light.High altitude clouds that reach above most of Neptune's absorbing methaneeasily stand out in the image though.Coated with frozen nitrogen, Neptune's largest moon Triton isbrighter than Neptune in reflected sunlight,seen at the upper left sporting the Webb telescope's characteristicdiffraction spikes.Including Triton, seven of Neptune's 14 known moons can beidentifiedin the field of view.Neptune's faint ringsare striking in this space-basedplanetary portrait.Details of the complex ring system are seen here for the firsttime since Neptune was visited by theVoyager 2 spacecraft in August 1989. Tomorrow's picture: long cloud<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights...

APOD: 2023 August 17 - A Cosmic Zoo in Cepheus Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 17 A Cosmic Zoo in Cepheus Image Credit &Copyright: Yann Sainty Explanation: Sprawling emission nebulae IC 1396 and Sh2-129 mixglowing interstellar gas and dark dust clouds in this nearly12 degree wide fieldof view toward the northern constellationCepheusthe King.Energized by its central star IC 1396 (left),is hundreds of light-years across and some 3,000 light-years distant.The nebula's intriguing dark shapes includea winding dark cloud popularly known as theElephant's Trunk below and right of center.Tens of light-years long, it holds the raw material for star formation and is known to hideprotostarswithin.Located a similar distance from planet Earth, thebright knots and swept back ridges of emission of Sh2-129 on the rightsuggest its popular name, theFlying Bat Nebula.Within the Flying Bat, the most recently recognizedaddition to this royal cosmic zoo is the faint bluish emission from Ou4, theGiant Squid Nebula.Near the lower right edge of the frame, the suggestivedark marking on the sky cataloged as Barnard 150 is also known as thedark Seahorse Nebula. Notable submissions to APOD: Perseids Meteor...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 18 Northern Pluto Image Credit:NASA,Johns Hopkins Univ./APL,Southwest Research Institute Explanation: Gaze acrossthe frozen canyons of northern Pluto in this contrast enhanced color scene.The image data used to construct it was acquiredin July 2015 by the New Horizons spacecraft as it madethe first reconnaissance flight throughthe remote Pluto system six billion kilometers from the Sun.Now knownas Lowell Regio, the region wasnamed for Percival Lowell, founder of the Lowell Observatory.Also famous for his speculation that there were canals on Mars,Lowell started the search that ultimatelyled to Pluto's discoveryin 1930 byClyde Tombaugh.In this frame Pluto'sNorth Poleis above and left of center.The pale bluish floor of the broad canyon on the left is about 70kilometers (45 miles) wide, running vertically toward the south.Higher elevations take on a yellowish hue.New Horizon's measurementswere used to determine that in addition to nitrogen ice,methane ice is abundant across Lowell Regio.So far, Pluto is the onlySolar System world named by an 11-year-old girl. Tomorrow's picture: ringed ice giant<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss|...

APOD: 2023 August 16 - Arp 93: A Cosmic Embrace Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 16 Arp 93: A Cosmic Embrace Image Credit &Copyright: Mike Selby,Observatorio El Sauce Explanation: Locked in a cosmic embrace,two large galaxies are mergingat the center of this sharp telescopic field of view.The interacting system catalogedas Arp 93 is some 200 millionlight-years distant toward the constellation Aquarius in planet Earth'ssky.Individually the galaxies are identified as NGC 7285 (right) and NGC 7284.Their bright cores are still separated by about20,000 light-years or so, but a massivetidal stream,a result of their ongoinggravitational interaction,extends over 200,000 light-yearstoward the bottom of the frame.Interacting galaxies do lookpeculiar,but are now understood to be common in the Universe.In fact, closer to home, the large spiral Andromeda Galaxy is known to beapproaching the Milky Way.Arp 93 may well present an analog of their distantfuture cosmic embrace. Notable submissions to APOD: Perseids Meteor Shower 2023 Tomorrow's picture: a cosmic zoo<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 17 A Cosmic Zoo in Cepheus Image Credit &Copyright: Yann Sainty Explanation: Sprawling emission nebulae IC 1396 and Sh2-129 mixglowing interstellar gas and dark dust clouds in this nearly12 degree wide fieldof view toward the northern constellationCepheusthe King.Energized by its central star IC 1396 (left),is hundreds of light-years across and some 3,000 light-years distant.The nebula's intriguing dark shapes includea winding dark cloud popularly known as theElephant's Trunk below and right of center.Tens of light-years long, it holds the raw material for star formation and is known to hideprotostarswithin.Located a similar distance from planet Earth, thebright knots and swept back ridges of emission of Sh2-129 on the rightsuggest its popular name, theFlying Bat Nebula.Within the Flying Bat, the most recently recognizedaddition to this royal cosmic zoo is the faint bluish emission from Ou4, theGiant Squid Nebula.Near the lower right edge of the frame, the suggestivedark marking on the sky cataloged as Barnard 150 is also known as thedark Seahorse Nebula. Notable submissions to APOD: Perseids Meteor Shower 2023 Tomorrow's picture: northern...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 16 Arp 93: A Cosmic Embrace Image Credit &Copyright: Mike Selby,Observatorio El Sauce Explanation: Locked in a cosmic embrace,two large galaxies are mergingat the center of this sharp telescopic field of view.The interacting system catalogedas Arp 93 is some 200 millionlight-years distant toward the constellation Aquarius in planet Earth'ssky.Individually the galaxies are identified as NGC 7285 (right) and NGC 7284.Their bright cores are still separated by about20,000 light-years or so, but a massivetidal stream,a result of their ongoinggravitational interaction,extends over 200,000 light-yearstoward the bottom of the frame.Interacting galaxies do lookpeculiar,but are now understood to be common in the Universe.In fact, closer to home, the large spiral Andromeda Galaxy is known to beapproaching the Milky Way.Arp 93 may well present an analog of their distantfuture cosmic embrace. Tomorrow's picture: a cosmic zoo<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA /GSFCNASA Science Activation& Michigan Tech. U.

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 12 Ghirigori - Star Scribbles Image Credit &Copyright: Paolo Palma Explanation: It's fun to scribble on thecanvas of the sky.You can use a creative photographic technique to causethe light of point-like stars to dance across a digitalimage by tapping lightly on the telescope while makingan exposure.The result will be a squiggly line traced by the star (or twosquiggles traced by binary stars) that can reveal the star's color.Colorful lines, dubbed Ghirigori,made from stars found inthe northern sky constellations Bootes,Corona Borealis, Ophiucus, and Coma Berenices, are capturedin this artistic mosaic.The 25 stars creating the varied and colorful squigglesare identified around the border.Of course, temperature determinesthe color of a star.While whitish stars tend to be close to the Sun's temperature,stars with bluer hues are hotter, and yellowand red colors are coolerthan the Sun. Weekend Watch: Perseid Meteor Shower Tomorrow's picture: a tip of the sombrero<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy...

APOD: 2023 August 11 - M51 in 255 Hours Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 11 Messier 51 in 255 Hours Image Credit &Copyright: The Deep Sky Collective -Carl Björk,Thomas Bähnck,Sebastian Donoso, Jake Gentillon,Antoine and Dalia Grelin,Stephen Guberski,Richard Hall,Tino Heuberger,Jason Jacks,Paul Kent, Brian Meyers,William Ostling, Nicolas Puig, Tim Schaeffer,Felix Schöfbänker, Mikhail Vasilev Explanation: An intriguing pair of interacting galaxies, M51 isthe 51st entryin Charles Messier's famous catalog.Perhaps theoriginal spiral nebula,the large galaxy with whirlpool-like spiral structure seen nearly face-onis also cataloged as NGC 5194.Itsspiral arms and dust lanessweep in front of a companion galaxy (right),NGC 5195.Some 31 million light-years distant,within the boundaries of the well-trained constellationCanesVenatici,M51 looks faint and fuzzy to the eye in direct telescopic views.But this remarkably deep imageshows off stunning details of the galaxy pair'sstriking colors and extensive tidal debris.A collaboration of astro-imagers using telescopes on planet Earthcombined over 10 days of exposure time tocreate this definitive galaxy portrait of M51.The image includes 118 hours of narrowband datathat also reveals a vast glowing cloud of reddish ionized hydrogen gasdiscovered in the M51system. Weekend Watch: Perseid Meteor Shower Tomorrow's...

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 11 Messier 51 in 255 Hours Image Credit &Copyright: The Deep Sky Collective -Carl Björk,Thomas Bähnck,Sebastian Donoso, Jake Gentillon,Antoine and Dalia Grelin,Stephen Guberski,Richard Hall,Tino Heuberger,Jason Jacks,Paul Kent, Brian Meyers,William Ostling, Nicolas Puig, Tim Schaeffer,Felix Schöfbänker, Mikhail Vasilev Explanation: An intriguing pair of interacting galaxies, M51 isthe 51st entryin Charles Messier's famous catalog.Perhaps theoriginal spiral nebula,the large galaxy with whirlpool-like spiral structure seen nearly face-onis also cataloged as NGC 5194.Itsspiral arms and dust lanessweep in front of a companion galaxy (right),NGC 5195.Some 31 million light-years distant,within the boundaries of the well-trained constellationCanesVenatici,M51 looks faint and fuzzy to the eye in direct telescopic views.But this remarkably deep imageshows off stunning details of the galaxy pair'sstriking colors and extensive tidal debris.A collaboration of astro-imagers using telescopes on planet Earthcombined over 10 days of exposure time tocreate this definitive galaxy portrait of M51.The image includes 118 hours of narrowband datathat also reveals a vast glowing cloud of reddish ionized hydrogen gasdiscovered in the M51system. Tomorrow's picture: 26 squiggles <| Archive| Submissions | Index| Search|...

APOD: 2023 August 10 - Five Meters over Mars Discover the cosmos!Each day a different image or photograph of our fascinating universe isfeatured, along with a brief explanation written by a professional astronomer. 2023 August 10 Five Meters over Mars Image Credit:NASA,JPL-Caltech,Ingenuity Explanation: On mission sol 872 (Earth date August 3) Ingenuity snappedthis sharp imageon its 54th flightabove the surfaceof the Red Planet.During the flight the Mars Helicopter hovered about 5 meters,or just over 16 feet, above the Jezero crater floor.Tips of Ingenuity's landing legs peek over the left and right edgesin the camera's field of view.Tracks visible near the upper right corner lead to thePerseverance Mars Rover, seen looking on from a distanceat the top right edge of the frame.Plannedas a brief "pop-up" flight, Ingenuity's 54th flight lasted less than 25seconds.It followed Ingenuity's 53rd flight made on July 22 that resulted inan unscheduled landing. Tomorrow's picture: 255 hours<| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Phillip NewmanSpecific rights apply.NASA WebPrivacy Policy and Important NoticesA service of:ASD atNASA /GSFCNASA Science Activation& Michigan Tech. U.