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NASA Astronomy Picture of the Day:

There is no sea on Earth large enough to contain the Shark nebula. This predator apparition poses us no danger as it is composed only of interstellar gas and dust. Dark dust like that featured here is somewhat like cigarette smoke and created in the cool atmospheres of giant stars. After expelling gas and gravitationally recondensing, massive stars may carve intricate structures into their birth cloud using their high energy light and fast stellar winds as sculpting tools. The heat they generate evaporates the murky molecular cloud as well as causing ambient hydrogen gas to disperse and glow red. During disintegration, we humans can enjoy imagining these great clouds as common icons, like we do for water clouds on Earth. Including smaller dust nebulae such as Van den Bergh 149 & 150, the Shark nebula, sometimes cataloged as LDN 1235, spans about 15 light years and lies about 650 light years away toward the constellation of the King of Aethiopia (Cepheus). Explore Your Universe: Random APOD Generator

Photo by Timothy Martin

New leaf from one Sorbus opens up. Focus stack of 14 photos.

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

NASA Astronomy Picture of the Day:

Thor not only has his own day (Thursday), but a helmet in the heavens. Popularly called Thor's Helmet, NGC 2359 is a hat-shaped cosmic cloud with wing-like appendages. Heroically sized even for a Norse god, Thor's Helmet is about 30 light-years across. In fact, the cosmic head-covering is more like an interstellar bubble, blown by a fast wind from the bright, massive star near the bubble's center. Known as a Wolf-Rayet star, the central star is an extremely hot giant thought to be in a brief, pre-supernova stage of evolution. NGC 2359 is located about 15,000 light-years away toward the constellation of the Great Overdog. This sharp image is a mixed cocktail of data from narrowband filters, capturing not only natural looking stars but details of the nebula's filamentary structures. The star in the center of Thor's Helmet is expected to explode in a spectacular supernova sometime within the next few thousand years.

Photo by Brian Hopkins (East Coast Astronomer)

Grey-breasted mountain toucan (Andigena hypoglauca), Hacienda El Bosque, Manizales, Caldas, Colombia.

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

John Updike (1932 - 2009),  Prolific American writer born in Reading, Pennsylvania. His work included 22 novels, many short stories, poetry and literary criticism. He was known for his careful craftsmanship and "realistic but subtle depiction of American, Protestant, small-town, middle-class” life. Updike's most famous work is his Rabbit series (Rabbit, Run; Rabbit Redux; Rabbit Is Rich; Rabbit At Rest; and Rabbit Remembered. More 

Source: John Updike, My Father's Tears and Other Stories.

Saint Patrick (c. 385 – c. 461), the foremost patron saint of Ireland. Saint Patrick's Day, or the Feast of Saint Patrick,  commemorates Saint Patrick and the arrival of Christianity in Ireland, and, by extension, celebrates the heritage and culture of the Irish in general. Initially, it was a religious observance, but it evolved into a secular celebration of Irish culture and heritage, particularly due to the Irish diaspora. It is now celebrated annually on March 17, in more than 200 countries. More

NASA Astronomy Picture of the Day:

This was a very unusual type of solar eclipse. Typically, it is the Earth's Moon that eclipses the Sun. In 2012, though, the planet Venus took a turn. Like a solar eclipse by the Moon, the phase of Venus became a continually thinner crescent as Venus became increasingly better aligned with the Sun. Eventually the alignment became perfect and the phase of Venus dropped to zero. The dark spot of Venus crossed our parent star. The situation could technically be labeled a Venusian annular eclipse with an extraordinarily large ring of fire. Pictured here during the occultation, the Sun was imaged in three colors of ultraviolet light by the Earth-orbiting Solar Dynamics Observatory, with the dark region toward the right corresponding to a coronal hole. Hours later, as Venus continued in its orbit, a slight crescent phase appeared again. The next Venusian transit across the Sun will occur in 2117.

Palmas Gate, Badajoz, Spain.

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

"I’m not sure when I first encountered the Serenity Prayer, or when it first occurred to me to ask who wrote it. For much of my life it never occurred to me that prayers were the kind of things that people actually wrote down, especially something as popular as the Serenity Prayer: “God grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to tell the difference.....” More at The Conversation ➜