Magazine Posts

NASA Astronomy Picture of the Day:

From a garden on planet Earth, 38 hours of exposure with a camera and small telescope produced this cosmic photo of the M81 galaxy group. In fact, the group's dominant galaxy M81 is near the center of the frame sporting grand spiral arms and a bright yellow core. Also known as Bode's galaxy, M81 itself spans some 100,000 light-years. Near the top is cigar-shaped irregular galaxy M82. The pair have been locked in gravitational combat for a billion years. Gravity from each galaxy has profoundly affected the other during a series of cosmic close encounters. Their last go-round lasted about 100 million years and likely raised density waves rippling around M81, resulting in massive star forming regions arrayed along M81's spiral arms. M82 was left with violent star forming regions too, and colliding gas clouds so energetic that the galaxy glows in X-rays. In the next few billion years, their continuing gravitational encounters will result in a merger, and a single galaxy will remain. Another group member, NGC 3077 is below and left of the large spiral M81. Far far away, about 12 million light-years distant the M81 group galaxies are seen toward the northern constellation Ursa Major (the Great Bear). But in the closer foreground the wide-field image is filled with integrated flux nebulae whose faint, dusty interstellar clouds reflect starlight above the plane of our own Milky Way galaxy.

Photo by Daniel Yang K.

Beautiful unfurling leaf of a Polystichum setiferum ('Herrenhausen'). Focus stack of 21 photos.

Dominicus Johannes Bergsma, CC BY-SA 4.0, via Wikimedia Commons. View source.

"Pastel-colored apparitions of tenderness, magnolias are titans of resilience. They have been consecrating Earth with their beauty since the time dinosaurs roamed it, long before bees evolved to give our planet its colors, pioneering the exquisitely orchestrated pollination strategies by which perfect flowers survive". Read more at the Marginalian

NASA Astronomy Picture of the Day:

What's at the tip of this interstellar jet? First let's consider the jet: it is being expelled by a star system just forming and is cataloged as Herbig-Haro 49 (HH 49). The star system expelling this jet is not visible -- it is off to the lower right. The complex conical structure featured in this infrared image by the James Webb Space Telescope also includes another jet cataloged as HH 50. The fast jet particles impact the surrounding interstellar gas and form shock waves that glow prominently in infrared light -- shown here as reddish-brown ridges. This JWST image also resolved the mystery of the unusual object at HH 49's tip: it is a spiral galaxy far in the distance. The blue center is therefore not one star but many, and the surrounding circular rings are actually spiral arms. Jump Around the Universe: Random APOD Generator

A modernist staircase of the BGK Building in Gdynia, Poland.

Bart Lumber, CC0, via Wikimedia Commons. View source.

BUT WE HAD MUSIC

Right this minute
across time zones and opinions
people are
making plans
making meals
making promises and poems

while

at the center of our galaxy
a black hole with the mass of
four billion suns
screams its open-mouth kiss
of oblivion.

Someday it will swallow
Euclid’s postulates and the Goldberg Variations,
swallow calculus and Leaves of Grass.

I know this.

And still
when the constellation of starlings
flickers across the evening sky,
it is enough

to stand here
for an irrevocable minute
agape with wonder.

It is eternity.

By Maria Popova Read more at the Marginalian

NASA Astronomy Picture of the Day:

Sometimes, the Moon visits the Pleiades. Technically, this means that the orbit of our Moon takes it directly in front of the famous Pleiades star cluster, which is far in the distance. The technical term for the event is an occultation, and the Moon is famous for its rare occultations of all planets and several well-known bright stars. The Moon's tilted and precessing orbit makes its occultations of the Seven Sisters star cluster bunchy, with the current epoch starting in 2023 continuing monthly until 2029. After that, though, the next occultation won't occur until 2042. Taken from Cantabria, Spain on April 1, the featured image is a composite where previous exposures of the Pleiades from the same camera and location were digitally added to the last image to bring up the star cluster's iconic blue glow. Jigsaw Challenge: Astronomy Puzzle of the Day

Portrait of a geometric moray (Gymnothorax griseus), Red Sea, Egypt. This moray eel belongs to the family Muraenidae and is found throughout the western Indian Ocean and Red Sea at depths to 40 metres (130 ft). Its length is up to 65 centimetres (26 in).

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