Eclipse in Seven

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. 2024 April 11 Eclipse in Seven Image Credit &Copyright:Xiaofeng Tan Explanation: Start at the upper left above and you can follow the progress ofApril 8'stotal eclipse of the Sun in seven sharp, separate exposures.The image sequence was recorded with a telescopeand camera located within thenarrow path of totality as theMoon's shadowswept across Newport, Vermont, USA.At center is a spectacular view ofthe solar corona.The tenuous outer atmosphere of the Sun is only easily visible tothe eye in clear dark skies during the total eclipse phase.Seen from Newport,the total phase for this solareclipse lasted about 3 minutes and 26 seconds. Monday's Eclipse Imagery: Notable Submissions to APOD Tomorrow's picture: the beginning and the end <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech. U.

The Solar Corona Unwrapped

APOD: 2024 April 5 - The Solar Corona Unwrapped 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. 2024 April 5 The Solar Corona Unwrapped Image Credit &Copyright: Peter Ward(Barden Ridge Observatory) Explanation: Changes in thealluring solar coronaare detailed in thiscreative composite imagemapping the dynamic outer atmosphere of the Sun during two separate total solar eclipses.Unwrapped from the complete circle of the eclipsed Sun's edgeto a rectangle and mirrored, the entire solar corona is shownduring the2017 eclipse (bottom)seen from Jackson Hole, Wyoming, and the2023 eclipse from Exmouth, Western Australia.While the 2017 eclipse was near a minimum in theSun's 11 year activity cycle,the 2023 eclipse was closer to solar maximum.The 2023 solar corona hints at the dramatically different characterof the active Sun,with many streamers and pinkish prominences arising along the solar limb.Of course, the solar corona is only easily visible to the eyewhile standing in the shadow of the Moon. NASA Coverage: Total Solar Eclipse of 2024 April 8 Tomorrow's picture: M51 unwound <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific...

Continue reading

Unwinding M51

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. 2024 April 6 Unwinding M51 Image Credit &Copyright:Data -Hubble Heritage Project,Unwinding - Paul Howell Explanation: The arms of a grand design spiral galaxy 60,000 light-years across areunwound in this digital transformation of the magnificent 2005Hubble Space Telescope portrait of M51.In fact, M51 is one of the original spiral nebulae, its windingarms described by a mathematical curve known as alogarithmicspiral, a spiral whose separation grows in ageometricway with increasing distance from the center.Applying logarithms to shift the pixelcoordinates in the Hubble image relative to the center of M51 mapsthe galaxy's spiral arms into diagonal straight lines.The transformed image dramatically shows the arms themselves aretraced by star formation, lined with pinkish starformingregions and young blue star clusters.Companion galaxy NGC 5195 (top) seems to alter the track of the arm infront of it though, and itself remains relatively unaffected by thisunwinding of M51.Also known as thespiramirabilis,logarthimic spirals can be found in nature on all scales.For example, logarithmic spirals can also describehurricanes, the tracks of subatomic particles in abubble chamberand, of course,cauliflower. NASA Coverage: Total Solar...

Continue reading

Comet Pons-Brooks at Night

APOD: 2024 April 4 - Comet Pons-Brooks at Night 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. 2024 April 4 Comet Pons-Brooks at Night Image Credit &Copyright: Dan Bartlett` Explanation: In dark evening skies over June Lake,northern hemisphere, planet Earth,Comet 12P/Pons-Brooksstood just above the western horizon on March 30.Its twisted turbulent ion tail and diffuse greenish coma are capturedin this two degree wide telescopic field of view along with brightyellowish star Hamal also known asAlpha Arietis.Now Pons-Brooks has moved out of the northern night though, approachingperihelion on April 21.On April 8 you mightstill spot the comet in daytime skies.But to do it, you will have to stand in the path of totality andlook away from the spectacle of analluring solar corona and totally eclipsed Sun. NASA Coverage: Total Solar Eclipse of 2024 April 8 Tomorrow's picture: pixels in space <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech. U.

The Solar Corona Unwrapped

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. 2024 April 5 The Solar Corona Unwrapped Image Credit &Copyright: Peter Ward(Barden Ridge Observatory) Explanation: Changes in thealluring solar coronaare detailed in thiscreative composite imagemapping the dynamic outer atmosphere of the Sun during two separate total solar eclipses.Unwrapped from the complete circle of the eclipsed Sun's edgeto a rectangle and mirrored, the entire solar corona is shownduring the2017 eclipse (bottom)seen from Jackson Hole, Wyoming, and the2023 eclipse from Exmouth, Western Australia.While the 2017 eclipse was near a minimum in theSun's 11 year activity cycle,the 2023 eclipse was closer to solar maximum.The 2023 solar corona hints at the dramatically different characterof the active Sun,with many streamers and pinkish prominences arising along the solar limb.Of course, the solar corona is only easily visible to the eyewhile standing in the shadow of the Moon. NASA Coverage: Total Solar Eclipse of 2024 April 8 Tomorrow's picture: M51 unwound <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility...

Continue reading

Comet Pons-Brooks at Night

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. 2024 April 4 Comet Pons-Brooks at Night Image Credit &Copyright: Dan Bartlett` Explanation: In dark evening skies over June Lake,northern hemisphere, planet Earth,Comet 12P/Pons-Brooksstood just above the western horizon on March 30.Its twisted turbulent ion tail and diffuse greenish coma are capturedin this two degree wide telescopic field of view along with brightyellowish star Hamal also known asAlpha Arietis.Now Pons-Brooks has moved out of the northern night though, approachingperihelion on April 21.On April 8 you mightstill spot the comet in daytime skies.But to do it, you will have to stand in the path of totality andlook away from the spectacle of analluring solar corona and totally eclipsed Sun. NASA Coverage: Total Solar Eclipse of 2024 April 8 Tomorrow's picture: pixels in space <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech. U.

Galileo's Europa

APOD: 2024 March 29 - Galileo's Europa 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. 2024 March 29 Galileo's Europa Image Credit: NASA,JPL-Caltech,SETI Institute,Cynthia Phillips,Marty Valenti Explanation: Looping through the Jovian system in the late 1990s, theGalileo spacecraftrecorded stunning views of Europa and uncoveredevidence that the moon's icy surface likely hidesa deep, global ocean.Galileo's Europa image data has beenremastered here, with improved calibrations to produce acolor image approximating what the human eye might see.Europa's long curving fractureshint at the subsurface liquid water. The tidal flexing the large moon experiencesin its elliptical orbitaround Jupiter supplies the energy to keep the ocean liquid.But moretantalizing is the possibilitythat even in theabsence of sunlight that process could also supply the energy tosupport life,making Europaone of the best places to look for lifebeyond Earth.The Juno spacecraft currently in Jovian orbithas also made repeated flybys of the water world,returning images along with data exploringEuropa's habitability.This October will see the launch of the NASA'sEuropa Clipperon a voyage ofexploration.The spacecraft will make nearly 50 flybys,approaching to within 25 kilometers of Europa's icy surface. Tomorrow's picture: Ptolemy's astronomy <| Archive| Submissions | Index| Search|...

Continue reading

Medieval Astronomy from Melk Abbey

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. 2024 March 30 Medieval Astronomy from Melk Abbey Image Credit: Paul Beck (Univ. Vienna),Georg Zotti (ViennaInst. Arch. Science)Copyright: Library of Melk Abbey, Frag. 229 Explanation: Discovered by accident, this manuscript pageprovides graphical insight to astronomy inmedieval times, before theRenaissance and the influence ofNicolaus Copernicus,Tycho de Brahe,Johannes Kepler, andGalileo.The intriguing page is from lecture noteson astronomy compiled by the monk Magister Wolfgang de Styriabefore the year 1490.The top panels clearly illustrate the necessary geometry for alunar (left) and solar eclipse in the Earth-centeredPtolemaic system.At lower left is a diagram of the Ptolemaic view of theSolar Systemwith text at the upper right to explain the movementof the planets according toPtolemy's geocentricmodel.At the lower right is a chart to calculate thedateof Easter Sunday in theJulian calendar.The illustrated manuscript page was found at historicMelk Abbey in Austria. Tomorrow's picture: eclipse below <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation&...

Continue reading

Millions of Stars in Omega Centauri

APOD: 2024 March 28 - Millions of Stars in Omega Centauri 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. 2024 March 28 Millions of Stars in Omega Centauri Image Credit &Copyright:Massimo Di Fuscoand Mirco Turra Explanation: Globular star clusterOmega Centauri,also known as NGC 5139, is 15,000 light-years away.The cluster is packed with about 10 millionstars much older than the Sun within a volume about 150 light-years indiameter.It's the largest and brightest of 200 or so knownglobular clusters that roam the halo of our Milky Way galaxy.Though most star clusters consist of stars with the same age andcomposition, the enigmatic Omega Cen exhibits the presence ofdifferentstellar populations with a spread of ages and chemical abundances.In fact,Omega Cen may betheremnantcore of a small galaxy merging with the Milky Way.With a yellowish hue,Omega Centauri's red giant stars are easy to pick out in thissharp, color telescopic view. Tomorrow's picture: Galileo's Europa <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech....

Continue reading

Galileo s Europa

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. 2024 March 29 Galileo's Europa Image Credit: NASA,JPL-Caltech,SETI Institute,Cynthia Phillips,Marty Valenti Explanation: Looping through the Jovian system in the late 1990s, theGalileo spacecraftrecorded stunning views of Europa and uncoveredevidence that the moon's icy surface likely hidesa deep, global ocean.Galileo's Europa image data has beenremastered here, with improved calibrations to produce acolor image approximating what the human eye might see.Europa's long curving fractureshint at the subsurface liquid water. The tidal flexing the large moon experiencesin its elliptical orbitaround Jupiter supplies the energy to keep the ocean liquid.But moretantalizing is the possibilitythat even in theabsence of sunlight that process could also supply the energy tosupport life,making Europaone of the best places to look for lifebeyond Earth.The Juno spacecraft currently in Jovian orbithas also made repeated flybys of the water world,returning images along with data exploringEuropa's habitability.This October will see the launch of the NASA'sEuropa Clipperon a voyage ofexploration.The spacecraft will make nearly 50 flybys,approaching to within 25 kilometers of Europa's icy surface. Tomorrow's picture: Ptolemy's astronomy <| Archive| Submissions | Index| Search| Calendar| RSS|...

Continue reading

Millions of Stars in Omega Centauri

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. 2024 March 28 Millions of Stars in Omega Centauri Image Credit &Copyright:Massimo Di Fuscoand Mirco Turra Explanation: Globular star clusterOmega Centauri,also known as NGC 5139, is 15,000 light-years away.The cluster is packed with about 10 millionstars much older than the Sun within a volume about 150 light-years indiameter.It's the largest and brightest of 200 or so knownglobular clusters that roam the halo of our Milky Way galaxy.Though most star clusters consist of stars with the same age andcomposition, the enigmatic Omega Cen exhibits the presence ofdifferentstellar populations with a spread of ages and chemical abundances.In fact,Omega Cen may betheremnantcore of a small galaxy merging with the Milky Way.With a yellowish hue,Omega Centauri's red giant stars are easy to pick out in thissharp, color telescopic view. Tomorrow's picture: pixels in space <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech. U.

Phobos: Moon over Mars

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. 2024 March 22 Phobos: Moon over Mars Image Credit: NASA,ESA,Zolt Levay (STScI)-Acknowledgment:J.Bell (ASU) andM.Wolff (SSI) Explanation: A tiny moon with a scary name,Phobos emerges from behindthe Red Planet in this timelapse sequence from the Earth-orbitingHubble Space Telescope.Over 22 minutes the 13 separate exposures werecaptured near the 2016 closestapproach of Mars to planet Earth.Martians have to look to the westto watch Phobos rise, though.The small moon is closer to itsparent planet than any othermoon in the Solar System, about 3,700 miles (6,000 kilometers)above the Martian surface.It completes one orbit in just 7 hours and 39 minutes.That's faster than a Mars rotation, which corresponds toabout 24 hours and 40 minutes.So on Mars, Phobos can be seen to rise abovethe western horizon 3 times a day.Still, Phobos is doomed. Tomorrow's picture: Ares 3 Landing Site <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech. U.

The Leo Trio

APOD: 2024 March 21 - The Leo Trio 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. 2024 March 21 The Leo Trio Image Credit &Copyright: Steve Cannistra Explanation: This popular group leaps into the early evening sky around the Marchequinox andthe northern hemisphere spring. Famous as theLeo Triplet,the three magnificent galaxies found in the prominentconstellation Leogather here in one astronomical field of view.Crowd pleasers when imaged with even modesttelescopes, they can be introduced individually asNGC 3628 (left), M66 (bottom right), and M65 (top).All three are largespiral galaxies buttend to look dissimilar, because their galactic disks aretilted at different angles to our line of sight.NGC 3628,also known as the Hamburger Galaxy,is temptingly seen edge-on, with obscuring dust lanescutting across its puffy galactic plane.The disksof M66andM65 areboth inclined enough to show off their spiral structure. Gravitational interactions between galaxies in the grouphave left telltale signs, including the tidal tails andwarped, inflated disk of NGC 3628 and the drawn out spiral arms of M66.This gorgeous viewof the region spans over 1 degree (two full moons) on the skyin a frame that covers over half a million light-years at...

Continue reading

The Leo Trio

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. 2024 March 21 The Leo Trio Image Credit &Copyright: Steve Cannistra Explanation: This popular group leaps into the early evening sky around the Marchequinox andthe northern hemisphere spring. Famous as theLeo Triplet,the three magnificent galaxies found in the prominentconstellation Leogather here in one astronomical field of view.Crowd pleasers when imaged with even modesttelescopes, they can be introduced individually asNGC 3628 (left), M66 (bottom right), and M65 (top).All three are largespiral galaxies buttend to look dissimilar, because their galactic disks aretilted at different angles to our line of sight.NGC 3628,also known as the Hamburger Galaxy,is temptingly seen edge-on, with obscuring dust lanescutting across its puffy galactic plane.The disksof M66andM65 areboth inclined enough to show off their spiral structure. Gravitational interactions between galaxies in the grouphave left telltale signs, including the tidal tails andwarped, inflated disk of NGC 3628 and the drawn out spiral arms of M66.This gorgeous viewof the region spans over 1 degree (two full moons) on the skyin a frame that covers over half a million light-years at thetrio's estimated distance...

Continue reading

ELT and the Milky Way

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. 2024 March 16 ELT and the Milky Way Image Credit &License:European Southern Observatory -Courtesy: Jens Scheidtmann Explanation: The southern winterMilky Way sprawlsacross this night skyscape.Looking due south, thewebcam viewwas recorded near local midnighton March 11 in dry, dark skies over the central Chilean Atacama desert.Seen below the graceful arc of diffuse starlightare satellite galaxies of the mighty Milky Way, also known asthe Large and SmallMagellanic clouds.In the foreground is the site of the European SouthernObservatory's 40-metre-classExtremely Large Telescope(ELT).Under construction at the 3000 metre summit ofCerro Armazones, the ELT ison track to become planet Earth's biggest Eye on the Sky. Tomorrow's picture: when galaxies collide <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility NoticesA service of:ASD atNASA /GSFC,NASA Science Activation& Michigan Tech. U.