Magazine Posts

Overview of the city of Horta, one of the three capitals of the archipelago, during the blue hour from Monte da Guia, Faial Island, Azores, Portugal.

Diego Delso, CC BY-SA 4.0, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

An intriguing pair of interacting galaxies, M51 is the 51st entry in Charles Messier's famous catalog. Perhaps the original spiral nebula, the large galaxy with whirlpool-like spiral structure seen nearly face-on is also cataloged as NGC 5194. Its spiral arms and dust lanes sweep in front of its smaller companion galaxy, NGC 5195. Some 31 million light-years distant, within the boundaries of the well-trained constellation Canes Venatici, M51 looks faint and fuzzy to the eye in direct telescopic views. But this remarkably deep image shows off stunning details of the galaxy pair's striking colors and fainter tidal streams. The image includes extensive narrowband data to highlight a vast reddish cloud of ionized hydrogen gas recently discovered in the M51 system and known to some as the H-alpha cliffs. Foreground dust clouds in the Milky Way and distant background galaxies are captured in the wide-field view. A continuing collaboration of astro-imagers using telescopes on planet Earth assembled over 3 weeks of exposure time to create this evolving portrait of M51. Watch: The 2024 Geminid Meteor Shower

Photo by The Deep Sky Collective

The image above shows a rare, cloud-free view of the remote Elephant Island on December 13, 2020, as captured by the Operational Land Imager (OLI) on Landsat 8.

NASA Earth Observatory image by Joshua Stevens, using Landsat data from the U.S. Geological Survey. Story by Kasha Patel., Public domain, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

Based on its well-measured orbit, 3200 Phaethon (sounds like FAY-eh-thon) is recognized as the source of the meteoroid stream responsible for the annual Geminid meteor shower. Even though most meteor shower parents are comets, 3200 Phaethon is a known and closely tracked near-Earth asteroid with a 1.4 year orbital period. Rocky and sun-baked, its perihelion or closest approach to the Sun is well within the orbit of innermost planet Mercury. In this telescopic field of view, the asteroid's rapid motion against faint background stars of the heroic constellation Perseus left a short trail during the two minute total exposure time. The (faint) parallel streaks of its meteoric children flashed much more quickly across the scene. The family portrait was recorded near the Geminid meteor shower's very active peak on 2017 December 13. That was just three days before 3200 Phaethon's historic close approach to planet Earth. This year, the night of December 13 should again see the peak of the Geminid meteor shower, but faint meteors will be washed out by the bright light of the nearly full moon. Watch: The 2024 Geminid Meteor Shower

Photo by Mikiya Sato

Saint Mary Basilica seen from the Cloth Hall in Kraków, Poland.

Jar.ciurus, CC BY-SA 3.0 pl, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

What's the closest active galaxy to planet Earth? That would be Centaurus A, cataloged as NGC 5128, which is only 12 million light-years distant. Forged in a collision of two otherwise normal galaxies, Centaurus A shows several distinctive features including a dark dust lane across its center, outer shells of stars and gas, and jets of particles shooting out from a supermassive black hole at its center. The featured image captures all of these in a composite series of visible light images totaling over 310 hours captured over the past 10 years with a homebuilt telescope operating in Auckland, New Zealand. The brightness of Cen A's center from low-energy radio waves to high-energy gamma rays underlies its designation as an active galaxy. Astrophysicists: Browse 3,500+ codes in the Astrophysics Source Code Library

"Since October 7th, 2023, fault lines around Palestinian solidarity have changed the landscape of visual art.....A wave of anti-Palestinian repression has swept the Western art world in the aftermath of October 7th, 2023. From Amsterdam to San Francisco, artists who have criticized Israel’s brutal war on Gaza have seen their exhibitions canceled, their work deinstalled, and other opportunities rescinded. Some of these incidents have been met with major backlash" More at Hyperallergic ➜

Mount Bolshoy Tkhach, 2,368 m (7,769 ft), 20 minutes after sunrise. Republic of Adygea, Western Caucasus. Today is International Mountain Day.

Vyacheslav Argenberg, CC BY 4.0, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

It was a night of 100,000 meteors. The Great Meteor Storm of 1833 was perhaps the most impressive meteor event in recent history. Best visible over eastern North America during the pre-dawn hours of November 13, many people -- including a young Abraham Lincoln -- were woken up to see the sky erupt in streaks and flashes. Hundreds of thousands of meteors blazed across the sky, seemingly pouring out of the constellation of the Lion (Leo). The featured image is a digitization of a wood engraving which itself was based on a painting from a first-person account. We know today that the Great Meteor Storm of 1833 was caused by the Earth moving through a dense part of the dust trail expelled from Comet Tempel-Tuttle. The Earth moves through this dust stream every November during the Leonid meteor shower. Later this week you might get a slight taste of the intensity of that 1833 meteor storm by witnessing the annual Geminid meteor shower. Explore Your Universe: Random APOD Generator

Newly-sown fields of Zangla village on the right bank of the Zanskar River contrasting refreshingly against the stark mountains of this arid region in the Indian Himalayas. The river flows from lower left to centre through a valley that narrows into the Zanskar gorge. Elevation: river 3,510 m (11,520 ft), peaks in centre ~5,200 m (17,100 ft). View from Zangla Fort, Zanskar, Ladakh, India.

This Photo was taken by Timothy A. Gonsalves. Feel free to use my photos, but please mention me as the author. I would much appreciate if you send me an email tagooty@gmail.com or write on my talk page, for my information. Please contact me before commercial use. Please do not upload an edited image here without consulting me. I would like to make corrections only at my own source to ensure that the changes improve the image and are preserved.Otherwise you may upload an edited image with a new name. Please use one of the templates derivative or extract., CC BY-SA 4.0, via Wikimedia Commons. View source.

NASA Astronomy Picture of the Day:

Have you ever seen the Pleiades star cluster? Even if you have, you probably have never seen it as large and clear as this. Perhaps the most famous star cluster on the sky, the bright stars of the Pleiades can be seen with the unaided eye even from the depths of a light-polluted city. With a long exposure from a dark location, though, the dust cloud surrounding the Pleiades star cluster becomes very evident. The featured 23-hour exposure, taken from Fagagna, Italy covers a sky area several times the size of the full moon. Also known as the Seven Sisters and M45, the Pleiades lies about 400 light years away toward the constellation of the Bull (Taurus). A common legend with a modern twist is that one of the brighter stars faded since the cluster was named, leaving only six of the sister stars visible to the unaided eye. The actual number of Pleiades stars visible, however, may be more or less than seven, depending on the darkness of the surrounding sky and the clarity of the observer's eyesight. New: Alternative multi-APOD front page

Photo by Francesco Pelizzo

Common crab spider (Xysticus cristatus) female with prey Carniolan honey bee (Apis melifera carnica), a subspecies of the western honey bee. Near Bled, Slovenia.

Charles J. Sharp, CC BY-SA 4.0, via Wikimedia Commons. View source.