Magazine Posts

NASA Astronomy Picture of the Day:

Some 190 million light-years away, far beyond the bright stars and nebulae of the Milky Way, these three galaxies are drawn together by gravity in a mesmerizing cosmic dance. Clearly distorted by galactic-scale gravitational interactions, large spiral galaxies NGC6769 and NGC6770 are seen face-on, with luminous galactic disks scarred by obscuring interstellar dust lanes. Their young blue star clusters along drawn out spiral arms are spawned in star forming regions that result from collisions of massive molecular clouds. Below, spiral NGC6771 presents a more edge-on perspective, its boxy central bulge due to tidal star streams. Of course, in the distant future a merger of the three galaxies is inevitable. At the estimated distance of this galaxy trio, known to some as the Devil's Mask, the sharp telescopic frame spans over 300 thousand light-years within the boundaries of the far southern constellation Pavo.

Photo by Mike Selby

Common chimpanzee (Pan troglodytes schweinfurthii) feeding on fig (Ficus sur), in the Kibale Forest, Uganda.

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

NASA Astronomy Picture of the Day:

What happens when one of the stars in a binary goes supernova? This image combines visible (yellow), ultraviolet (purple) and infrared light (cyan, red and orange) to show two supernova remnants and their surrounding environment, about 6,000 light-years away. The younger one is the well-known Jellyfish Nebula in the center (mostly in yellow). If we could see it by eye, it would appear larger than the full moon in the sky. The filament shown in purple is part of an older, overlapping supernova remnant, G189.6+3.3. A new study used data from NASA's Fermi Gamma-ray Space Telescope to piece together their story. Astronomers believe that there were two stars in a binary system, then the first one exploded as a supernova, kicking away its companion, which also exploded as a supernova tens of thousands of years later, creating the superimposed supernova remnants we see today. The bright star on the right is actually a triple star system named Propus.

Schwäbisch Hall, Germany: the northern old town on Salinenstrasse, seen over the River Kocher. In the foreground is the Kocher weir with a fish ladder (right).

Roman Eisele, CC BY-SA 4.0, via Wikimedia Commons. View source.

This is the time to be slow
Lie low to the wall
Until the bitter weather passes

Try, as best you can, not to let
The wire brush of doubt
Scrape from your heart
All sense of yourself
And your hesitant light.

If you remain generous,
Time will come good;
And you will find your feet

Again on fresh pastures of promise,
Where the air will be kind
And blushed with beginning.

John O’Donohue

To Bless the Space Between Us: A Book of Blessings

Sue Tucker on Unsplash

NASA Astronomy Picture of the Day:

Although they look like cotton candy, you cannot eat these clouds! Taken in Cádiz, Spain, today's image features the Rho Ophiuchi complex, a rich tapestry of young and old astronomical phenomena. This colorful cloud complex is a nearby star-forming region containing hundreds of young stellar objects, including protostars and T Tauri stars. Light from the triple star system at its center reflects off of small dust grains to create the blue reflection nebula. Ultraviolet light from hot stars ionizes the surrounding hydrogen gas, creating the red emission nebula. Antares, a red supergiant big enough to engulf the Solar System’s asteroid belt, lights up the yellow region. Dark interstellar dust blocks some of the complex’s color. Recent JWST observations exhibit shadows cast by hidden circumstellar disks, the beginning stages of planet formation. Messier 4, a globular cluster almost as old as the universe, sits in the bottom right and witnesses yet another chaotic burst of youth in the Milky Way.

Photo by Ángel Molina Text: Keighley Rockcliffe (NASA GSFC, UMBC CSST, CRESST II)

Willan's chromodoris (Chromodoris willani), Anilao, Philippines. This 5 centimetres (2.0 in)-long nudibranch can be found in the Western Pacific Ocean and feeds, like many other nudibranchs, on sponges.

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

Looking through these three windows on history reminds us that while the tools of civilization evolve, the human story continues to be driven by many of the same hopes, challenges, and ambitions that have shaped every generation. Continue reading