Sheila Mendenhall

14 Flips | 3 Magazines | 3 Followers | @sheilarae1969 | Keep up with Sheila Mendenhall on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “Sheila Mendenhall”

Stunning Snapshot: Southern Star Cluster Helps Unlock Galactic Mysteries

Changing Planet<p>The star cluster NGC 3590 shines brightly in front of a dramatic landscape of dark patches of dust and richly hued clouds of glowing gas. Courtesy of ESO/G. Beccari<p><b>A colorful portrait of a distant star cluster offers space buffs some eye candy. But it’s also telling astronomers a lot</b> …

Colorado Mudslide Highlights Dangers of Drenched Slopes

Heavy rains can destabilize mountains and lead to deadly disasters.<p>A massive mudslide that has authorities searching for three missing men in remote western Colorado highlights the dangers of heavy rain saturating slopes.<p>Half a mile of a rain-soaked ridge near the small mountain town of Collbran, …

Earliest Bird Pollinator Found in Germany

Fossilized 47 million years ago, it was the size of a hummingbird—but unlike any living species.<p>Today's hummingbirds ferry pollen from blossom to blossom, helping flowering plants reproduce. Their occupational ancestors, however, were birds of a different feather. According to a paper published in …

Northern Hemisphere Cracks 400 ppm CO₂ for Whole Month for First Time

Carbon dioxide levels exceeded 400 ppm across the Northern Hemisphere for the entire month of April, a significant climate-change milestone.<p>Carbon dioxide levels in the atmosphere crossed a significant threshold in April, just weeks after the White House released a major report on the impacts of …

Christopher Payne photographs North Brother Island in his book, North Brother Island: The Last Unknown Place in New York City (PHOTOS).

North Brother Island is a secret hiding in plain sight. Located in New York’s East River, it was once an important part of the city’s infrastructure. …

no gasoline today (xpro). north edwards, ca. 2014.

fresh jerky. rice, ca. 2014.

A Tour of Japan Through the Lens of an Urban Explorer

Canadian photographer Chris Luckhardt (featured previously) travels the world in search of adventure and exploration. He specializes in documenting …

APOD: In the Center of Spiral Galaxy M61 (2014 May 20) Image Credit: ESA/Hubble, NASA; Acknowledgements: G. Chapdelaine & L. Limatola Explanation: M61 is a barred spiral galaxy located in the nearby Virgo Cluster of Galaxies. Visible in M61 are a host of features common to spiral galaxies: bright spiral arms, a central bar, dust lanes, and bright knots of stars. M61, also known as NGC 4303, in similar to our own Milky Way Galaxy. M61 was discovered by telescope in 1779 twice on the same day, but one observer initially mistook the galaxy for a comet. Light from M61 takes about 55 million years to reach us. The above image of the central regions of M61 was taken with the Hubble Space Telescope and adapted for release as part of the Hubble's Hidden Treasures image processing competition. Starship Asterisk* • APOD Discussion Page #APOD

APOD: A Supercell Storm Cloud Forming over Wyoming (2014 May 21) Video Credit: Basehunters (BasehuntersChasing) Music: Empire (Shakira) Explanation: How do supercell storm clouds form? Pictured above is a time-lapse video taken last Sunday detailing the formation of one such violent supercell in eastern Wyoming, USA. Starting as part of a large and dark thunderstorm complex, the supercell comes together along with a large rotating updraft of air known as a mesocyclone. Mesocyclones form during rapid changes in wind speed and direction with height and can produce torrential rain, damaging hail, swirling winds, and sometimes tornadoes. Storm watchers are seen studying, imaging, and ultimately running from the developing storm cloud during the video. During the middle part of the video, the kilometer-wide supercell can be seen swirling ominously with a nearly flat bottom. Toward the end of the video, another swirling supercell cloud forms but then quickly dissipates. Starship Asterisk* Poll: Have you seen this video before? Starship Asterisk* • APOD Discussion Page #APOD

APOD: Star Factory Messier 17 (2014 May 27) Image Credit & Copyright: Subaru Telescope (NAOJ), Hubble Space Telescope; Processing: Robert Gendler & Roberto Colombari Explanation: What's happening at the center of this nebula? Sculpted by stellar winds and radiation, the star factory known as Messier 17 lies some 5,500 light-years away in the nebula-rich constellation Sagittarius. At that distance, this degree wide field of view spans almost 100 light-years. The sharp, composite, color image utilizing data from space and ground based telescopes, follows faint details of the region's gas and dust clouds against a backdrop of central Milky Way stars. Stellar winds and energetic light from hot, massive stars formed from M17's stock of cosmic gas and dust have slowly carved away at the remaining interstellar material producing the cavernous appearance and undulating shapes. M17 is also known as the Omega Nebula or the Swan Nebula. Starship Asterisk* • APOD Discussion Page #APOD

APOD: Millions of Stars in Omega Centauri (2014 May 29) Image Credit & Copyright: CEDIC Team, Processing - Christoph Kaltseis Explanation: Globular star cluster Omega Centauri, also known as NGC 5139, is some 15,000 light-years away. The cluster is packed with about 10 million stars much older than the Sun within a volume about 150 light-years in diameter, the largest and brightest of 200 or so known globular clusters that roam the halo of our Milky Way galaxy. Though most star clusters consist of stars with the same age and composition, the enigmatic Omega Cen exhibits the presence of different stellar populations with a spread of ages and chemical abundances. In fact, Omega Cen may be the remnant core of a small galaxy merging with the Milky Way. This astronomically sharp color image of the classic globular cluster was recorded in March under Chilean skies from Hacienda Los Andes. Starship Asterisk* • APOD Discussion Page #APOD

APOD: The Cone Nebula from Hubble (2014 May 28) Image Credit: Hubble Legacy Archive, NASA, ESA - Processing & Licence: Judy Schmidt Explanation: Stars are forming in the gigantic dust pillar called the Cone Nebula. Cones, pillars, and majestic flowing shapes abound in stellar nurseries where natal clouds of gas and dust are buffeted by energetic winds from newborn stars. The Cone Nebula, a well-known example, lies within the bright galactic star-forming region NGC 2264. The Cone was captured in unprecedented detail in this close-up composite of several observations from the Earth-orbiting Hubble Space Telescope. While the Cone Nebula, about 2,500 light-years away in Monoceros, is around 7 light-years long, the region pictured here surrounding the cone's blunted head is a mere 2.5 light-years across. In our neck of the galaxy that distance is just over half way from the Sun to its nearest stellar neighbor, the Alpha Centauri star system. The massive star NGC 2264 IRS, seen by Hubble's infrared camera in 1997, is the likely source of the wind sculpting the Cone Nebula and lies off the top of the image. The Cone Nebula's reddish veil is produced by glowing hydrogen gas. Starship Asterisk* • APOD Discussion Page #APOD