Draco (constellation) Draco is a constellation in the far northern sky. Its name is Latin for dragon. Draco is circumpolar (that is, never setting) for many observers in the northern hemisphere. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations today. The constellation Draco as it can be seen by the naked eye. There are two other stars above magnitude 3 in Draco. Draco is home to several double stars and binary stars. η Draconis is a double star with a yellow-hued primary of magnitude 2.8 and a white-hued secondary of magnitude 8.2 located south of the primary. R Draconis is a red Mira-type variable star with a period of about 8 months. The constellation contains the star recently named Kepler-10 which has been confirmed to be orbited by Kepler-10b, the smallest ever rocky Earth-sized planet detected outside of our solar system. PGC 39058, a dwarf galaxy found within the Draco constellation – picture taken by ESA/Hubble & NASA.
Sirius Sirius appears bright because of both its intrinsic luminosity and its proximity to Earth. At a distance of 2.6 parsecs (8.6 ly), as determined by the Hipparcos astrometry satellite, the Sirius system is one of Earth's near neighbors; for Northern-hemisphere observers between 30 degrees and 73 degrees of latitude (including almost all of Europe and North America), it is the closest star (after the Sun) that can be seen with the naked eye. Sirius is gradually moving closer to the Solar System, so it will slightly increase in brightness over the next 60,000 years. After that time its distance will begin to recede, but it will continue to be the brightest star in the Earth's sky for the next 210,000 years. Sirius A is about twice as massive as the Sun and has an absolute visual magnitude of 1.42. It is 25 times more luminous than the Sun but has a significantly lower luminosity than other bright stars such as Canopus or Rigel. Observational history Kinematics
Betelgeuse Coordinates: 05h 55m 10.3053s, +07° 24′ 25.426″ The star is classified as a red supergiant of spectral type M2Iab and is one of the largest and most luminous observable stars. If Betelgeuse were at the center of the Solar System, its surface would extend past the asteroid belt, possibly to the orbit of Jupiter and beyond, wholly engulfing Mercury, Venus, Earth and Mars. In 1920, Betelgeuse became the second star (after the Sun) to have the angular size of its photosphere measured. Observational history Nascent discoveries The variation in Betelgeuse's brightness was first described in 1836 by Sir John Herschel, when he published his observations in Outlines of Astronomy. In 1920, Albert Michelson and Francis Pease mounted a 6-meter interferometer on the front of the 2.5-meter telescope at Mount Wilson Observatory. Imaging breakthroughs Recent studies Visibility Parallax
Fact or Fiction?: Dark Matter Killed the Dinosaurs Every once in a great while, something almost unspeakable happens to Earth. Some terrible force reaches out and tears the tree of life limb from limb. In a geological instant, countless creatures perish and entire lineages simply cease to exist. The most famous of these mass extinctions happened about 66 million years ago, when the dinosaurs died out in the planet-wide environmental disruption that followed a mountain-sized space rock walloping Earth. But this is only one of the “Big Five” cataclysmic mass extinctions recognized by paleontologists, and not even the worst. Or maybe mass extinctions are not matters of chaotic chance at all. In the early 1980s, the University of Chicago paleontologists David Raup and Jack Sepkoski found evidence for a 26-million-year pattern of mass extinction in the fossil record since the Great Dying of the Permian-Triassic. It may not be a fringe idea much longer. “In most models of dark matter, these clumps don’t exist,” Randall says.
Aurignacian - Wikipedia Entrance to the Potočka Zijalka, a cave in the Eastern Karavanke, where the remains of a human residence dated to the Aurignacian (40,000 to 30,000 BP) were found by Srečko Brodar in the 1920s and 1930s. It was the first high-altitude Aurignacian site to be discovered that significantly influenced the knowledge of the culture The Aurignacian (/ɔːrɪɡˈneɪʃən/) is an archaeological tradition of the Upper Palaeolithic. It is associated with the earliest modern humans in Europe and their migration from the Near East. The type site is Aurignac, Haute-Garonne, south-west France. The oldest undisputed example of human figurative art, the Venus of Hohle Fels, comes from the Aurignacian. Main characteristics Association with modern humans Art Typical statuettes consist of women that are called Venus figurines. Aurignacian finds include bone flutes. Tools Location Map of the Mediterranean with important Aurignacian sites (clickable map). Asia Siberia See also
Cygnus (constellation) Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, an distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. Cygnus as depicted in Urania's Mirror, a set of constellation cards published in London c.1825. Surrounding it are Lacerta, Vulpecula and Lyra. In Polynesia, Cygnus was often recognized as a separate constellation. Cygnus culminates at midnight on 29 June, and is most visible in the evening from the early summer to mid-autumn in the Northern Hemisphere.
Is NASA Covering Up the 100-Year Starship? - FoxNews.com NASA appears to be debating a way to permanently colonize another planet, boldly going where no one has ever gone -- and where no one could come back, some fear.Paramount A NASA official may have made a 35-million-mile slip of the tongue. The director of NASA's Ames Research Center in California casually let slip mention of the 100-Year Starship recently, a new program funded by the super-secret government agency, DARPA. In a talk at San Francisco's Long Conversation conference, Simon “Pete” Worden said DARPA has $1M to spend, plus another $100,000 from NASA itself, for the program, which will initially develop a new kind of propulsion engine that will take us to Mars or beyond. There's only one problem: The astronauts won't come back. The 100-year ship would leave Earth with the intention of colonizing a planet, but it would likely be a one-way trip because of the time it takes to travel 35 million miles. But what is the Hundred Year Starship? Dr.
Rigel Although Rigel has the Bayer designation "beta", it is almost always brighter than Alpha Orionis (Betelgeuse). Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified. Visibility Rigel is the third most inherently luminous first magnitude star after Deneb and Betelgeuse. Rigel has a color index (B–V) of −0.03, meaning it appears white or lightly blue-white. Culminating at midnight on December 12, and at 9 pm on January 24, Rigel is most visible in winter evenings in the northern hemisphere and summer in the southern. In the southern hemisphere, Rigel is the first bright star of Orion visible as the constellation rises. Properties Rigel is a variable supergiant, the variability being caused by stellar pulsations similar to those of Deneb, the prototype of the class of Alpha Cygni pulsating stars. Space photometry Computer generated image of Rigel compared to the Sun (to scale)
Paratrooper - Wikipedia Pakistani Paratroopers Landing at Kalam Valley During Kalam Valley Annual Festival Paratroopers are military parachutists — military personnel trained in parachuting into an operation and usually functioning as part of an airborne force. Military parachutists (troops) and parachutes were first used on a large scale during World War II for troop distribution and transportation. Paratroopers are often used to seize strategic objectives such as airfields or bridges. Overview U.S. This doctrine was first practically applied to warfare by the Italians and the Soviets. In World War II, paratroopers most often used parachutes of a circular or round design. Paratrooper forces around the world Many countries have one or several paratrooper units, usually associated to the national Army or Air Force, but in some cases to the Navy. History Argentina Australia Peru India The Parachute Regiment is the Special Forces/airborne regiment of the Indian Army. France
THE EGYPTIAN STAR OF BETHLEHEM. Excerpt from the book Secret Chamber The brightest of all the fixed stars is Sirius. Known to astronomers as Alpha Canis Major, it is the principal star of the constellation Canis Major (the Big Dog). The ancient Egyptians called it Septit, the Hebrews knew it as Sihor, to the Greeks as Sothis and also as the "the Dog Star" that followed Orion the Hunter. Sirius has a magnitude of -1.42, which makes it nine times more brilliant than a standard first magnitude star. It can even been seen in daylight with a telescope having an aperture of 12 mm. Plate 1: The star Sirius A in Canis Major Its colour is a brilliant white with a tinge of blue and purple. Plate 2: Sky region of the Duat Throughout recorded history, and probably long before, Sirius was the subject of much veneration and myth making throughout the world. Since earliest times the ancient Egyptian paid particular attention to Sirius, which they identified to the 'soul' of the Goddess Isis. Plate 3: Isis and the Child Horus Plate 4: Sirius-Isis following Orion-Osiris