Black hole glimpsed playing cosmic billiards - BBC News Astronomers have witnessed two big blobs of plasma, shot into space by a black hole, cannoning into each other in a dramatic cosmic billiard-shot. The supermassive black hole sits at the heart of the sixth brightest galaxy in our sky, blasting out a jet of plasma at 98% of the speed of light. A fast-moving knot within that jet bore down on another, in a dazzling impact. It was captured in a series of images snapped by the Hubble Space Telescope, spanning 20 years.
The Beginning of the Universe and the Limit of Knowledge “Despite its name, the big bang theory is not really a theory of a bang at all. It is really only a theory of the aftermath of a bang.” -Alan Guth So you finally understand it. The Big Bang tells us that the Universe was hotter, denser, and expanding at a faster rate in the past. Image credit: original source unknown.
String Theory and the Scientific Method There’s a new philosophy of science book out, Richard Dawid’s String Theory and the Scientific Method (available online here if your institution is paying Cambridge University Press appropriately or if you have a credit card). It comes with endorsements from string theorists David Gross and John Schwarz, with Schwarz writing: Richard Dawid argues that string theory plays a novel role in the scientific process that has been neglected by philosophers of science. I believe that this book is a valuable contribution to the philosophy of science, which should interest practicing scientists as well as those who are more interested in the methodology of science. Dawid is a particle theorist turned philosopher, and as you might guess from the endorsement, he approaches string theory from an enthusiast’s point of view.
Surreal Hyperrealistic Paintings Turn Human Bodies Into Decorative Art Virtual reality - Acrylic, alkyd and oil on glazed canvas, 80 x 80 cm At first blush, Marco Grassi’s works of art look like intimate photographs, his models glancing shyly away from the camera. Their skin has a velvety fuzz and slightly mottled tone; their lips and knuckles are softly creased. Their tousled hair forms a halo of barely visible fibers around their heads. Detail, Virtual reality - Acrylic, alkyd and oil on glazed canvas, 80 x 80 cm
Wow! signal The Wow! signal was a strong narrowband radio signal detected by Jerry R. Ehman on August 15, 1977, while he was working on a SETI project at the Big Ear radio telescope of Ohio State University, then located at Ohio Wesleyan University's Perkins Observatory in Delaware, Ohio. The signal bore the expected hallmarks of non-terrestrial and non-Solar System origin. It lasted for the full 72-second window that Big Ear was able to observe it, but has not been detected again. The signal has been the subject of significant media attention.
Time Machines and Event Horizons » Undivided Looking I've written a pop-article about Time Machines and Event Horizons, which has appeared on the Scientific American blog Critical Opalescence. George Musser, my host, is an editor at Scientific American, and kindly gave me this opportunity to talk about some of my ideas in my article, The Generalized Second Law implies a Quantum Singularity Theorem. If you have any questions about the physics in the article, please feel free to leave comments on this post here.
Is Time an Illusion? (Video) “Time has no independent existence apart from the order of events by which we measure it.” —Albert Einstein Surprising as it may be to most non-scientists and even to some scientists, Albert Einstein concluded in his later years that the past, present, and future all exist simultaneously. Search Results You searched for "3d" 31 January 2013 This stuff was crazy! This mesmerizing video shows how incredibly vast space really is Light travels at about 186,000 miles per second. That's an incomprehensibly fast speed — faster than any other object in the universe. But the video above shows how huge just our corner of the galaxy is, even for a photon of light traveling at that remarkable speed. The film, by artist Alphonse Swinehart, gives you the view you'd see if you were a particle of light traveling from the sun across the solar system — even though it's 45 minutes long, you still don't even reach Saturn. This video is a striking reminder that even though we grow up looking at diagrams of the solar system with the planets neatly packed together, it's actually almost entirely made up of empty space.
125 Great Science Videos: From Astronomy to Physics & Psychology Astronomy & Space Travel A Brief, Wondrous Tour of Earth (From Outer Space) - Video - Recorded from August to October, 2011 at the International Space Station, this HD footage offers a brilliant tour of our planet and stunning views of the aurora borealis.A Universe from Nothing - Video – In 53 minutes, theoretical physicist Lawrence Krauss answers some big enchilada questions, including how the universe came from nothing.A Year of the Moon in 2.5 Minutes – Video – The Lunar Reconnaissance Orbiter has been orbiting the moon for over a year. The footage gets compressed into 2 slick minutes.A Day on Earth (as Seen From Space) – Video – Astronaut Don Pettit trained his camera on planet Earth, took a photo once every 15 seconds, and then created a brilliant time-lapse film.Atlantis’s Final Landing at Kennedy Space Center - Video - After more than 30 years, the space shuttle era comes to a close. Video runs 30 minutes. Physics
Total lunar eclipse of September 28, 2015 - online broadcasts schedule After more than 30 years a supermoon in combination with a lunar eclipse will be visible again across the skies of North and South America, Europe, Africa and parts of west Asia and the eastern Pacific. This rare celestial event is set for September 28 (UTC), 2015, and is expected to last for 1 hour and 11 minutes. For those who might find themselves to be unlucky with their location, weather conditions or light-polluted night skies, there is still hope, as many observatories will broadcast the event - live and free: NASA will broadcast the event from 00:00 UTC until at least 03:30 UTC, September 28, from Marshall Space Flight Center in Huntsville with a live feed from the Griffith Observatory, Los Angeles, Adler Planetarium, Chicago, Fernbank Observatory in Atlanta and other locations across the US.
Strange plants of Socotra Island Imagine waking up on the Socotra Island < > and taking a good look around you. After a yelp of disbelief, you'd be inclined to think you were transported to another planet - or traveled to another era of Earth's history. The second would be closer to the truth for this island, which is part of a group of four islands, has been geographically isolated from mainland Africa for the last 6 or 7 million years. Like the Galapagos Islands, this island is teeming with 700 extremely rare species of flora and fauna, a full 1/3 of which are endemic, i.e. found nowhere else on Earth. The climate is harsh, hot, and dry, and yet - the most amazing plant life thrives there. Situated in the Indian Ocean 250 km from Somalia and 340 km from Yemen, the wide sandy beaches rise to limestone plateaus full of caves (some 7 km in length) and mountains up to 1,525 metres high.
Inflatable, 20km tall 'space elevator' could replace rockets A Canada-based space company has patented an inflatable "space elevator" designed to propel astronauts up into the stratosphere before they blast off into space. If the maverick "ThothX Tower" were ever actually built, it would soar 20km (12.4 miles) into the sky, and would reduce the cost of space launches by 30 percent in fuel costs alone, according to estimations. It's even hoped that the lift could replace some kinds of satellites. Thoth Technology's Brendan Quine, who invented the prototype, explained: "Astronauts would ascend to 12 miles by electrical elevator. From the top of the tower, space planes will launch in a single stage to orbit, returning to the top of the tower for refuelling and reflight."
Today's Moon Phase The Moon today is in a Waning Gibbous Phase. This is the first phase after the Full Moon occurs. It lasts roughly 7 days with the Moon’s illumination growing smaller each day until the Moon becomes a Last Quarter Moon with a illumination of 50%.