Public Posts

Fanning Tseng on Unsplash

NASA Astronomy Picture of the Day:

Messier 82 is a starburst galaxy with a superwind. In fact, through supernova explosions and powerful winds from massive stars, the burst of star formation in M82 is driving a prodigious outflow. Evidence for the superwind from the galaxy's central regions is clear in the sharp telescopic portrait. The composite image includes 33 hours of narrowband data, highlighting emission from long outflow filaments of atomic hydrogen gas in reddish hues. Some of the gas in the superwind, enriched in heavy elements forged in the massive stars, will eventually escape into intergalactic space. Triggered by a close encounter with nearby large galaxy M81, the furious burst of star formation in M82 should last about 100 million years or so. Also known as the Cigar Galaxy for its elongated visual appearance, M82 is about 30,000 light-years across. It lies 12 million light-years away near the northern boundary of Ursa Major.

Photo by Arnaud Malleval

Teichbachtal near Gütenbach/Simonswald, Baden-Württemberg, Germany.

Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons. View source.

Martin Luther King Jr. - (1929 - 1968) American Christian minister, activist and leader in the Civil Rights Movement from 1955 until his assassination in 1968.

Cristiane Teston on Unsplash

NASA Astronomy Picture of the Day:

If you live in the northern hemisphere, you may have learned how to locate the North Star, Polaris, in the night sky. It can be used to find north, and it approximately marks the northern celestial pole. If you live in the southern hemisphere, there is no bright star marking the southern celestial pole, but the Southern Cross can be used to find south. The featured image was taken in Padre Bernardo (GO), Brazil. It shows the apparent motion of the stars around the apparently empty southern celestial pole over 2 hours, on August 20, 2018. Each star takes about 24 hours to make a complete turn around the pole in the sky. Padre Bernardo is located in the Cerrado region, a tropical savanna that occupies most of central Brazil and supports rich biodiversity. The barren branch that apparently supports this sky wheel of rotating stars is a common sight there in the dry season during the southern winter.

Photo by Kiko Fairbairn

Blue shark (Prionace glauca), Faial-Pico Channel, Azores Islands, Portugal. The blue shark is a species of requiem shark, in the family Carcharhinidae, that inhabits deep waters (images taken though between 5 and 10 meter below water) averaging around 3.1 m (10 ft) and preferring cooler waters. They can live up to 20 years, can move very quickly and feed primarily on small fish and squid, although they can take larger prey.

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

When April's here and meadows wide
Once more with spring's sweet growths are pied
I close each book, drop each pursuit,
And past the brook, no longer mute,
I joyous roam the countryside.

Look, here the violets shy abide
And there the mating robins hide—
How keen my sense, how acute,
When April's here!

And list! down where the shimmering tide
Hard by that farthest hill doth glide,
Rise faint strains from shepherd's flute,
Pan's pipes and Berecyntian lute.
Each sight, each sound fresh joys provide
When April's here.

This poem by Jessie Redmon Fause is in the public domain.

Jessie Redmon Fauset (1882 – 1961) was a poet, essayist, novelist, educator and editor from the Harlem Renaissance. Her literary work helped sculpt African-American literature in the 1920s as she focused on portraying a true image of African-American life and history. She wrote several novels, including There Is Confusion (1924) and Plum Bun (1928). Fauset also served as the editor of The Crisis from 1919–26.... Wikipedia