Icaria, GreeceJune 15, 2011Image Credit & Copyright: Chris Kotsiopoulos...
Kamis, 28 Februari 2013
Rabu, 27 Februari 2013
Asperatus Clouds over New Zealand
What kind of clouds are these? Although their cause is presently unknown, such unusual atmospheric structures, as menacing as they might seem, do not appear to be harbingers of meteorological doom. Known informally as Undulatus asperatus clouds, they can be stunning in appearance, unusual in occurrence, are relatively unstudied,...
Supercell
A supercell is a thunderstorm that is characterized by the presence of a mesocyclone: a deep, persistently rotating updraft. For this reason, these storms are sometimes referred to as rotating thunderstorms. Of the four classifications of thunderstorms (supercell, squall line, multi-cell, and single-cell), supercells are the overall least common...
Senin, 25 Februari 2013
Alaskan Moondogs
Moonlight illuminates a snowy scene in this night land and skyscape made on January 17, 2013 from Lower Miller Creek, Alaska, USA. Overexposed near the mountainous western horizon is the first quarter Moon itself, surrounded by an icy halo and flanked left and right by moondogs. Sometimes called mock...
Minggu, 24 Februari 2013
A Lenticular Cloud over New Zealand
What's happening above those mountains? Several clouds are stacked up into one striking lenticular cloud. Normally, air moves much more horizontally than it does vertically. Sometimes, however, such as when wind comes off of a mountain or a hill, relatively strong vertical oscillations take place as the air stabilizes....
Sabtu, 23 Februari 2013
Sunrise Solstice at Stonehenge
This picture was taken during the week of the 2008 summer solstice at Stonehenge in United Kingdom, and captures a picturesque sunrise involving fog, trees, clouds, stones placed about 4,500 years ago, and a 5 billion year old large glowing orb. Even given the precession of the Earth's rotational...
Kamis, 21 Februari 2013
Rabu, 20 Februari 2013
NASA's Kepler Mission Discovers Tiny Planet System
NASA's Kepler mission has discovered a new planetary system that is home to the smallest planet yet found around a star like our Sun, approximately 210 light-years away in the constellation Lyra. The artist's concept depicts the new planet dubbed Kepler-37b. The planet is slightly larger than our Moon, measuring...
Andromeda's Colorful Rings
The ring-like swirls of dust filling the Andromeda Galaxy stand out colorfully in this new image from the Herschel Space Observatory, a European Space Agency mission with important NASA participation. The glow seen here comes from the longer-wavelength, or far, end of the infrared spectrum, giving astronomers the chance to...
Selasa, 19 Februari 2013
Eastern Coast of United States at Night
One of the Expedition 30 crew members aboard the International Space Station took this nighttime photograph of much of the eastern (Atlantic) coast of the United States. Large metropolitan areas and other easily recognizable sites from the Virginia/Maryland/Washington, D.C. area spanning almost to Rhode Island are visible in the...
Senin, 18 Februari 2013
Shadows across Jupiter
Two dark shadows loom across the banded and mottled cloud tops of Jupiter in this sharp telescopic view. In fact, captured on January 3, 2013, about a month after the ruling gas giant appeared at opposition in planet Earth's sky, the scene includes the shadow casters. Visible in remarkable...
Sabtu, 16 Februari 2013
Mariner 10's Portrait of Venus
On February 5, 1974, Mariner 10 took this first close-up photo of Venus. Made using an ultraviolet filter in its imaging system, the photo has been color-enhanced to bring out Venus's cloudy atmosphere as the human eye would see it. Venus is perpetually blanketed by a thick veil of clouds...
Jumat, 15 Februari 2013
Massive Star Makes Waves
The giant star Zeta Ophiuchi is having a "shocking" effect on the surrounding dust clouds in this infrared image from NASA’s Spitzer Space Telescope. Stellar winds flowing out from this fast-moving star are making ripples in the dust as it approaches, creating a bow shock seen as glowing gossamer...
Kamis, 14 Februari 2013
The Cosmic Hearth
The Orion Nebula is featured in this sweeping image from NASA's Wide-field Infrared Survey Explorer, or WISE. The constellation of Orion is prominent in the evening sky throughout the world from about December through April of each year. The nebula (also catalogued as Messier 42) is located in the...
Rabu, 13 Februari 2013
W49B: Rare Explosion May Have Created Our Galaxy's Youngest Black Hole
The highly distorted supernova remnant shown in this image may contain themost recent black hole formed in the Milky Way Galaxy. The image combines X-rays from NASA's Chandra X-ray Observatory in blue and green, radio data from the NSF's Very Large Array in pink, and infrared data from Caltech's...
Stratocumulus Clouds over Pacific
On January 4, 2013 a large presence of stratocumulus clouds was the central focus of camera lenses which remained aimed at the clouds as the Expedition 34 crew members aboard the International Space Station flew above the northwestern Pacific Ocean about 460 miles east of northern Honshu, Japan. This...
Senin, 11 Februari 2013
The Milky Way seen over Ontario
Sometimes, after your eyes adapt to the dark, a spectacular sky appears. Such was the case earlier July 2008 over Ontario, Canada, when part of a spectacular sky also became visible in a reflection off a lake. To start, the brightest objects visible are bright stars and the planet...
Reflections on the Horsehead Nebula
Sculpted by stellar winds and radiation, a magnificent interstellar dust cloud by chance has assumed this recognizable shape. Fittingly named the Horsehead Nebula, it is some 1,500 light-years distant, embedded in the vast Orion cloud complex. About five light-years "tall", the dark cloud is cataloged as Barnard 33 and...
Minggu, 10 Februari 2013
Minggu, 03 Februari 2013
A Circumhorizontal Arc over Ohio
Why would clouds appear to be different colors? The reason here is that ice crystals in distant cirrus clouds are acting like little floating prisms. Sometimes known as a fire rainbow for its flame-like appearance, a circumhorizon arc lies parallel to the horizon. For a circumhorizontal arc to be...
Sabtu, 02 Februari 2013
Anticrepuscular Rays over Colorado
What's happening over the horizon? Although the scene may appear somehow supernatural, nothing more unusual is occurring than a setting Sun and some well placed clouds. In this picture are anticrepuscular rays. To understand them, start by picturing common crepuscular rays that are seen any time that sunlight pours...
Jumat, 01 Februari 2013
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