background preloader

'Brighter than a full moon': The biggest star of 2013... could be Ison - the comet of the century - Science - News

'Brighter than a full moon': The biggest star of 2013... could be Ison - the comet of the century - Science - News
Comet Ison could draw millions out into the dark to witness what could be the brightest comet seen in many generations – brighter even than the full Moon. It was found as a blur on an electronic image of the night sky taken through a telescope at the Kislovodsk Observatory in Russia as part of a project to survey the sky looking for comets and asteroids – chunks of rock and ice that litter space. Astronomers Vitali Nevski and Artyom Novichonok were expecting to use the International Scientific Optical Network's (Ison) 40cm telescope on the night of 20 September but clouds halted their plans. It was a frustrating night but about half an hour prior to the beginning of morning twilight, they noticed the sky was clearing and got the telescope and camera up and running to obtain some survey images in the constellations of Gemini and Cancer. When the images were obtained Nevski loaded them into a computer program designed to detect asteroids and comets moving between images.

This is Turnip Rock in Michigan, USA The final frontier of a son’s awe – and abject fear For most people, Feb. 1, 2003, passed like any other day. Sure, a pretty big disaster dominated the headlines: The space shuttle Columbia disintegrated as it re-entered the atmosphere, raining down bits of metal and debris on the lawns of some Texans. But at the end of the news cycle, most people ate dinner and drifted off to sleep. For me, however, it was different. Growing up the son of an astronaut sounds glamorous, and in many ways it is. I didn’t quite understand how lucky we were to have that access, but I always expected it to be there. Columbia changed all that. The news networks milked the disaster as long as they could, then moved on. My father’s previous spaceflight (STS-100) had occurred less than two years before Columbia, which meant that, regardless of scheduling changes related to the disaster, he wouldn’t be flying again any time soon. Then, in early 2008, Dad got a new assignment. I’d learned what failure means in my father’s line of work. Yes, I’m terrified.

Radio telescopes capture best-ever snapshot of black hole jets An international team, including NASA-funded researchers, using radio telescopes located throughout the Southern Hemisphere has produced the most detailed image of particle jets erupting from a supermassive black hole in a nearby galaxy. "These jets arise as infalling matter approaches the black hole, but we don't yet know the details of how they form and maintain themselves," said Cornelia Mueller, the study's lead author and a doctoral student at the University of Erlangen-Nuremberg in Germany. The new image shows a region less than 4.2 light-years across -- less than the distance between our sun and the nearest star. Radio-emitting features as small as 15 light-days can be seen, making this the highest-resolution view of galactic jets ever made. The study will appear in the June issue of Astronomy and Astrophysics and is available online. Mueller and her team targeted Centaurus A (Cen A), a nearby galaxy with a supermassive black hole weighing 55 million times the sun's mass.

Philosophie verständlich : Willensfreiheit : Harry G. Frankfurt Hauptwerke 1988 The Importance of What We Care About1999 Necessity, Volition, and Love Der klassische Kompatibilismus von Thomas Hobbes und David Hume setzt Freiheit mit Handlungsfreiheit gleich und definiert Handlungsfreiheit als die Fähigkeit, tun zu können, was man tun will. Wünsche erster und zweiter Stufe Menschen haben – wie viele andere Lebewesen auch – Wünsche: Sie wünschen sich Nahrung und Kleidung, eine neues Auto oder besseres Wetter und vieles mehr. Einen Wunsch zweiter Stufe habe ich zum Beispiel, wenn ich den Wunsch (erster Stufe) verspüre zu rauchen und gleichzeitig (auf der zweiten Stufe) wünsche, diesen Wunsch nicht zu haben. Bei den Wünschen erster Stufe unterscheidet Frankfurt Wünsche, die man einfach nur hat, von solchen, die tatsächlich handlungswirksam werden. Willensfreiheit nach Frankfurt Was bedeutet es, dass der Wille einer Person frei ist? Nehmen wir als Beispiel den Drogenabhängigen David. Freiheit und Verantwortlichkeit Kurzes Resümee Einwände Literatur

Why Explore Space? . Specifically, she asked how he could suggest spending billions of dollars on such a project at a time when so many children were starving on Earth. Stuhlinger soon sent the following letter of explanation to Sister Jucunda, along with a copy of "Earthrise," the iconic photograph of Earth taken in 1968 by astronaut William Anders, from the Moon (also embedded in the transcript). May 6, 1970Dear Sister Mary Jucunda:Your letter was one of many which are reaching me every day, but it has touched me more deeply than all the others because it came so much from the depths of a searching mind and a compassionate heart. The photograph which I enclose with this letter shows a view of our Earth as seen from Apollo 8 when it orbited the moon at Christmas, 1968.

Cybersleuths Uncover 5-Year Spy Operation Targeting Governments, Others | Threat Level Map showing the location and industry of victims in 69 countries hit by the spy operation. Courtesy of Kaspersky Lab An advanced and well-orchestrated computer spy operation that targeted diplomats, governments and research institutions for at least five years has been uncovered by security researchers in Russia. The highly targeted campaign, which focuses primarily on victims in Eastern Europe and Central Asia based on existing data, is still live, harvesting documents and data from computers, smartphones and removable storage devices, such as USB sticks, according to Kaspersky Lab, the Moscow-based antivirus firm that uncovered the campaign. Kaspersky has dubbed the operation “Red October.” While most of the victims documented are in Eastern Europe or Central Asia, targets have been hit in 69 countries in total, including the U.S., Australia, Ireland, Switzerland, Belgium, Brazil, Spain, South Africa, Japan and the United Arab Emirates.

Elon Musk's Mission to Mars | Wired Science Maverick entrepreneur Elon Musk Photo: Art Streiber When a man tells you about the time he planned to put a vegetable garden on Mars, you worry about his mental state. But if that same man has since launched multiple rockets that are actually capable of reaching Mars—sending them into orbit, Bond-style, from a tiny island in the Pacific—you need to find another diagnosis. That’s the thing about extreme entrepreneurialism: There’s a fine line between madness and genius, and you need a little bit of both to really change the world. All entrepreneurs have an aptitude for risk, but more important than that is their capacity for self-delusion. I have never met an entrepreneur who fits this model more than Elon Musk. And he is leading the private space race with SpaceX, which is poised to replace the space shuttle and usher us into an interplanetary age. It’s no wonder the character of Tony Stark in Iron Man, played by Robert Downey Jr., was modeled on Musk: This is superhero-grade stuff.

Okay... Don't move! Magnetosphere in Sound One of NASA's newest missions has recorded the radio waves coming from our magnetosphere. Musicians: Sample away. A graphic of Earth's twin rings of plasma known as the Van Allen Radiation Belts in our planet's magnetosphere (NASA) Surrounding our planet are rings of plasma, part of Earth's magnetosphere, which are pulsing with radio waves. Those waves are not audible to the human ear alone, but radio antennae can pick them up, and that's just what an instrument -- the Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) -- on NASA's recently launched Radiation Belt Storm Probes has done. The noises, often picked up here on Earth by ham-radio operators, are called Earth's "chorus" as they are reminiscent of a chorus of birds chirping in the early morning.

Segelqualle An den Strand gespülte Segelquallen Die Segelqualle (Velella velella) (syn. V. lata Chamisso & Eysenhardt, 1821) ist ein zu den Hydrozoen gehörendes Nesseltier (Cnidaria). Wegen ihres Baus wird die Qualle im Deutschen auch "Segler vor dem Wind" oder "Sankt-Peters-Schifflein" genannt[1] (Petrus: Schutzheiliger der Fischer). Merkmale[Bearbeiten] Die Meduse weist vier radiale Kanäle auf und besitzt zwei Paare sich gegenüber stehender perradialer Tentakeln, einen kurzen adaxialen Tentakel und einen langen abaxialen Tentakel. Segelqualle mit randständigen Wehrpolypen Geographische Verbreitung und Lebensweise[Bearbeiten] Segelquallen leben weltweit in tropischen und subtropischen Meeren (auch im westlichen Mittelmeer), und zwar an der Wasseroberfläche der Hochsee. Feinde[Bearbeiten] Zu den Feinden der Segelqualle gehören unter anderem die zu den Nacktkiemern gehörende pelagische Schnecke Glaucus atlanticus und die Veilchenschnecke (Janthina janthina). Fortpflanzung[Bearbeiten] Literatur[Bearbeiten]

Cosmic latte Cosmic Latte is a name assigned to the average color of the universe, given by a team of astronomers from Johns Hopkins University. Discovery of the color[edit] In 2001, Karl Glazebrook and Ivan Baldry determined that the color of the universe was a greenish white, but they soon corrected their analysis in a 2002 paper,[1] in which they reported that their survey of the color of all light in the universe added up to a slightly beigeish white. The survey included more than 200,000 galaxies, and measured the spectral range of the light from a large volume of the universe. The hexadecimal RGB value for Cosmic Latte is #FFF8E7. The finding of the "color of the universe" was not the focus of the study, which was examining spectral analysis of different galaxies to study star formation. Glazebrook's and Baldry's work was funded by the David and Lucile Packard Foundation. Naming of the color[edit] The color was displayed in a Washington Post article. References[edit] External links[edit]

Related: