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The Solar Corona Unwrapped

Copyright: Barden Ridge Observatory Changes in the alluring solar corona are detailed in this creative composite image mapping the dynamic outer atmosphere of the Sun during two separate total solar eclipses. Unwrapped from the complete circle of the eclipsed Sun’s edge to a rectangle and mirrored, the entire solar corona is shown during the 2017 […]

Comet Pons-Brooks at Night

Copyright: Dan Bartlett In dark evening skies over June Lake, northern hemisphere, planet Earth, Comet 12P/Pons-Brooks stood just above the western horizon on March 30. Its twisted turbulent ion tail and diffuse greenish coma are captured in this two degree wide telescopic field of view along with bright yellowish star Hamal also known as Alpha […]

Unusual Nebula Pa 30

Copyright: What created this unusual celestial firework? The nebula, dubbed Pa 30, appears in the same sky direction now as a bright “guest star” did in the year 1181. Although Pa 30’s filaments look similar to that created by a nova (for example GK Per), and a planetary nebula (for example NGC 6751), some astronomers […]

Detailed View of a Solar Eclipse Corona

Copyright: Phil Hart Only in the fleeting darkness of a total solar eclipse is the light of the solar corona easily visible. Normally overwhelmed by the bright solar disk, the expansive corona, the sun’s outer atmosphere, is an alluring sight. But the subtle details and extreme ranges in the corona’s brightness, although discernible to the […]

Swirling Magnetic Field around Our Galaxy’s Central Black Hole

Copyright: What’s happening to the big black hole in the center of our galaxy? It is sucking in matter from a swirling disk — a disk that is magnetized, it has now been confirmed. Specifically, the black hole’s accretion disk has recently been seen to emit polarized light, radiation frequently associated with a magnetized source. […]

Total Solar Eclipse Below the Bottom of the World

Copyright: Petr Horálek (ESO Photo Ambassador, Inst. of Physics in Opava) ; Acknowledgement: Xavier Jubier In late 2021 there was a total solar eclipse visible only at the end of the Earth. To capture the unusual phenomenon, airplanes took flight below the clouded seascape of Southern Ocean. The featured image shows one relatively spectacular capture […]

Medieval Astronomy from Melk Abbey

Copyright: Library of Melk Abbey, Frag. 229 Discovered by accident, this manuscript page provides graphical insight to astronomy in medieval times, before the Renaissance and the influence of Nicolaus Copernicus, Tycho de Brahe, Johannes Kepler, and Galileo. The intriguing page is from lecture notes on astronomy compiled by the monk Magister Wolfgang de Styria before […]

Galileo’s Europa

Copyright: Looping through the Jovian system in the late 1990s, the Galileo spacecraft recorded stunning views of Europa and uncovered evidence that the moon’s icy surface likely hides a deep, global ocean. Galileo’s Europa image data has been remastered here, with improved calibrations to produce a color image approximating what the human eye might see. […]

Millions of Stars in Omega Centauri

Copyright: Massimo Di Fusco Globular star cluster Omega Centauri, also known as NGC 5139, is 15,000 light-years away. The cluster is packed with about 10 million stars much older than the Sun within a volume about 150 light-years in diameter. It’s the largest and brightest of 200 or so known globular clusters that roam the […]

The Coma Cluster of Galaxies

Copyright: Joe Hua Almost every object in the featured photograph is a galaxy. The Coma Cluster of Galaxies pictured here is one of the densest clusters known – it contains thousands of galaxies. Each of these galaxies houses billions of stars – just as our own Milky Way Galaxy does. Although nearby when compared to […]

Comet Pons-Brooks’ Ion Tail

Copyright: Comet Pons-Brooks has quite a tail to tell. First discovered in 1385, this erupting dirty snowball loops back into our inner Solar System every 71 years and, this time, is starting to put on a show for deep camera exposures. In the featured picture, the light blue stream is the ion tail which consists […]

Sonified: The Jellyfish Nebula Supernova Remnant

Copyright: What does a supernova remnant sound like? Although sound is a compression wave in matter and does not carry into empty space, interpretive sound can help listeners appreciate and understand a visual image of a supernova remnant in a new way. Recently, the Jellyfish Nebula (IC 443) has been sonified quite creatively. In the […]

Looking Back at an Eclipsed Earth

Copyright: CNES Here is what the Earth looks like during a solar eclipse. The shadow of the Moon can be seen darkening part of Earth. This shadow moved across the Earth at nearly 2000 kilometers per hour. Only observers near the center of the dark circle see a total solar eclipse – others see a […]

Phobos: Moon over Mars

Copyright: A tiny moon with a scary name, Phobos emerges from behind the Red Planet in this timelapse sequence from the Earth-orbiting Hubble Space Telescope. Over 22 minutes the 13 separate exposures were captured near the 2016 closest approach of Mars to planet Earth. Martians have to look to the west to watch Phobos rise, […]

The Leo Trio

Copyright: Steve Cannistra This popular group leaps into the early evening sky around the March equinox and the northern hemisphere spring. Famous as the Leo Triplet, the three magnificent galaxies found in the prominent constellation Leo gather here in one astronomical field of view. Crowd pleasers when imaged with even modest telescopes, they can be […]