Is the Earth getting lighter? BBC Radio's More or Less ("the mathematical icing on the cake of life") talks to some of the Naked Scientists from Cambridge about whether the Earth is gaining or losing mass, revealing some surprising and interesting facts.
King of the Cosmos (A Profile of Neil deGrasse Tyson) by Carl Zimmer. (Via) [more inside]
"They may well do it." [The Guardian] Sir Arthur C Clarke predicted in a lost BBC interview that the Russians would win the space race by landing the first man on the moon in 1968, probably on the 50th anniversary of the October Revolution. Arthur C Clarke on The Sky at Night – video.
One of my favorite blogs happens to be local to me. Eric Berger, the Houston Chronicle's "SciGuy" usually reports on the weather. But he also posts entertaining and serious stuff as well. [more inside]
Scientist and Science Fiction author Joan Slonczewski, author of A Door Into The Ocean, guest blogs about science fictional and microbiology on Charles Stross's site: Salt Beings, Microbes grow the starship, Synthetic Babies
Carolyn Porco is the leader of the Imaging Team on the Cassini-Huygens mission. Watch as she extolls the wonders and discovery about two of Saturn's most interesting moons, Titan and Enceladus. [more inside]
The Lunar Reconnaissance Orbiter has taken new photos of the landing sites of Apollo 12, 14 and 17. Almost 40 years after the missions, the tracks made by the astronauts and the Lunar Rover are still visible.
NASA May Have Discovered Flowing Water on Mars Dark, finger-like features appear and extend down some Martian slopes during late spring through summer, fade in winter, and return during the next spring. Repeated observations have tracked the seasonal changes in these recurring features on several steep slopes in the middle latitudes of Mars' southern hemisphere.
Are We Alone In the Universe? New Analysis Says Maybe. In a new paper published on arXiv.org, astrophysicist David Spiegel at Princeton University and physicist Edwin Turner at the University of Tokyo argue...using a statistical method called Bayesian reasoning...that the life here on Earth could be common, or it could be extremely rare — there's no reason to prefer one conclusion over the other. [more inside]
The official Google Earth plugin is one free download that makes all sorts of cool stuff possible in your browser. There's a full screen version of the program (complete with underwater views and 3D buildings) which can be searched by entering queries at the end of the URL. There's a framed version with support for layers, historical imagery, day/night cycles, and the Google Sky starmap. Less useful but more fun are Google's collection of "experiments" demonstrating the possibilities of the Earth API, including a "Geo Whiz" geography quiz, an antipode locater, a 3D first-person view of San Francisco, a virtual route-follower, and MONSTER MILKTRUCK!, a crazy fun driving simulator that lets you careen a virtual milk truck through the Googleplex campus, ricochet off the Himalayas, or explore any other place you care to name. Lots more can be found in the Google Earth Gallery -- highlights include a look at mountaintop removal mining, a real-time flight tracker, a guide to trails and outdoor recreation, a 360 panorama catalog, geotagged Panoramio photos, and the comprehensive crowdsourced Google Earth Community Layer. And while it's too large to view online, don't miss loading the Metafilter user location map into a desktop version of Google Earth! [more inside]
It is a stunning image and one that is bound to be reproduced over and over again whenever they recall the history of the US space shuttle.
The concept of time as a way to measure the duration of events is not only deeply intuitive, it also plays an important role in our mathematical descriptions of physical systems. For instance, we define an object’s speed as its displacement per a given time. But some researchers theorize that this Newtonian idea of time as an absolute quantity that flows on its own, along with the idea that time is the fourth dimension of spacetime, are incorrect. They propose to replace these concepts of time with a view that corresponds more accurately to the physical world: time as a measure of the numerical order of change.
First Orbit. "On 12th April 2011 it will be 50 years to the day since Yuri Gagarin climbed into his space ship and was launched into space. It took him just 108 minutes to orbit Earth and he returned as the World's very first space man. To mark this historic flight we have teamed up with the astronauts onboard the International Space Station to film a new view of what Yuri would have seen as he travelled around the planet. Weaving these new views together with historic voice recordings from Yuri's flight and an original score by composer Philip Sheppard, we have created a spellbinding film to share with people around the World on this historic anniversary." [more inside]
As they leave the solar system, the Pioneer spacecraft have anomalously decelerated, pointing to a possible gap in our understanding of gravity. Now, a computer graphics technique known as Phong shading predicts that the Pioneer anomaly is just a side effect of how the shape of the spacecraft reflects sunlight.
"The Earth tide is a little-known daily event, similar to the oceans' more familiar tides. But the sun and moon's gravity doesn’t just pull on water, it deforms the Earth itself, causing the ground beneath us to bulge toward the pulling heavenly body." [more inside]
ISRO scientists think they have found a horizontal uncollapsed lava tube on the moon, 1.7 km long, 360 m wide, and 120 m high (roughly 1 mile x 1200 ft x 400 ft) which could be used as a lunar base by astronauts for inter-planetary missions. [more inside]
Introducing the Nautilus-X MMSEV, a manned deep space craft proposed by a team at NASA's Johnson Space Centre.
One of the most enduring mysteries in solar physics is why the Sun's outer atmosphere, or corona, is millions of degrees hotter than its surface. - Now scientists believe they have discovered a major source of hot gas that replenishes the corona
A space wardrobe - images of the National Air and Space Museum’s collection of spacesuits from throughout the history of American space exploration.
"I can sense stars, and their whispers amid the roaring of our own Sun." So goes one poetic status of the Voyager 2 twitterfeed, which appeals to my sense of wonder like nothing else on the internet. Interstellar space probes and microblogging go hand in hand in the 21st Century.
The most detailed photo of the surface of the sun looks like this. It was taken by the team at CA's Big Bear Solar Observatory. They have some other neat images of our nearest star at their website. [more inside]
Dmitar Sasselov is an astrophysicist, Director of the Origins of Life Initiative at Harvard and a co-investigator of the Kepler space telescope project to find Earth-like planets around the Cygnus constellation and discover extraterrestrial life. But no matter how successful the Kepler project may be, it still won't answer the most fundamental questions of astrobiology: How diverse is life in the universe? If alien life exists, will it have Earthly DNA and proteins? Or will it run on something else? So Dr. Sasselov has decided to collaborate with two synthetic biologists, asking them to create a life form based on mirror-image versions of what we know as the essential building blocks of living things on Earth. [more inside]
A hot carbon-rich gas giant exoplanet, WASP-12b, has been discovered. As the lead author of the paper being published today, Nikku Madhusudhan, says: ""This planet reveals the astounding diversity of worlds out there". In particular, the discovery supports theories that there are likely to be planets made of diamond and graphite out there.
Built as part of the fifth /dev/fort developer retreat, Spacelog.org allows you to explore early space missions via the original NASA transcripts. Currently live are Mercury 6 which made John Glenn the first American in orbit, and the 'successful failure' Apollo 13 (The transcribed key moment and the original). Alongside the transcripts are supporting materials from the NASA archives including photography and descriptions of the mission phases. The developers are looking for help to digitise the Gemini 7, Apollo 8 and Apollo 11 missions.
Time lapse footage of Earth taken by Don Pettit during his time on the International Space Station. [more inside]
Maybe the entire universe as we know it really is just sitting inside a black hole of another, bigger universe.
On July 17th, NASA's Wide-field Infrared Survey Explorer (WISE) satellite completed its first survey of the entire sky viewable from Earth. After just seven months in orbit, WISE -- a precursor to the planned James Webb Space Telescope -- has returned more than a million images that provide a close look at celestial objects ranging from distant galaxies to asteroids. The first release of WISE data, covering about 80 percent of the sky, will be delivered to the astronomical community in May of next year, but in the meantime we can see some of the images and animations that NASA has released to date: Galleries (containing just a small selection of images): 1, 2, 3, 4. Videos and Animations: 1, 2 [more inside]
Year On Earth breaks it down, explaining the complicated mechanics involved in trying to determine how long a year really is, why seasons and ice ages happen, and how not all years are created equal.
The Carnegie Institution for Science reports "a much higher water content in the Moon’s interior than previous studies." For decades, the moon's water content was estimated at less than 1 part per billion; the new estimates range from 64 ppb to 5 parts per million. A scientist at Washington University said, "We can now finally begin to consider the implications—and the origin—of water in the interior of the Moon.” There's more at NASA and the BBC, and the full paper is available at PNAS (PDF).
Trouble started soon into Hayabusa's treacherous round-trip journey to Itokawa when she lost her companion, Minerva. On arrival, she stumbled and dropped the sample she was sent to retrieve, and we thought the worst when she stopped calling. One accident left her disoriented and unable to find her way, and another reduced her progress to a slow limp. But on Sunday, with unfailing help from home, Hayabusa returns, three years late and seven years after she departed.
Moon Zoo is another project from Oxford astrophysicist Chris Lintott, the creator of Galaxy Zoo (previously: 1, 2, 3). Moon Zoo calls for citizen scientists to record the craters and boulders, among other things, on the Moon's surface. [more inside]
NASA's MESSENGER team (previously: 1, 2, 3), with help from the U.S. Geological Survey, released yesterday the first global map of the planet Mercury. [more inside]
Reprocess of Bubble Nebula Data. NGC 7635, also called the Bubble Nebula, is an emission nebula in the constellation Cassiopeia. It's created by stellar winds from a superhot star 40 times the size of our sun which whip the cloud of gas around the star into a bubble. [Via]
...the lyrics to that last song were basically taken from an encyclopedia written in the 50s, and since the 50s, some remarkable things have happened...In 1959, a number of songs about science were released on an album called Space Songs. One of these was later covered by the band They Might Be Giants: Why Does The Sun Shine? (The Sun Is A Mass of Incandescent Gas). Only one problem: it isn't--the song was based on an incorrect text from 1951. So they wrote an answer song to themselves: Why Does The Sun Really Shine? (The Sun Is a Miasma of Incandescent Plasma). Bonus link: see for yourself! (previously)
The Anatomy of Spiral Arms, shows how galaxies naturally evolve to form grand-design two-arm spirals. The Hubble Ultra Deep Field in 3D. [more inside]
Spacehack "A directory of ways to participate in space exploration. Interact and connect with the space community."
Welcome to the Universe - III: The Size of Things . . .we take a breif trip through the Solar System and beyond to see the size of the Universe. A youtube video by AndromedasWake about the scale of the Universe.
Go buy a helmet because Astronomers calculate there is a tiny chance that Mars or Venus could collide with Earth. [more inside]
SpaceTimeTV collects and lets you watch all the best educational videos online from full length documentaries (such as the 50 minute long Is There Life on Mars) to short video clips such as this one on glaciers and global warming. There are hundreds of videos on topics including history, space, technology, and nature.
Are plasma crystals alive? Cosmic dust can, in the presence of plasma, creates formations known as plasma crystals. An international team of researchers published a study in the Aug.14, 2007, issue of the New Journal of Physics (PDF here, abstract here) that indicates that these crystals may be more sophisticated than anyone realized. In simulations involving cosmic dust, the researchers witnessed the formation of plasma crystals displaying some of the elementary characteristics of life -- DNA-like structure, autonomous behavior, reproduction and evolution. [more inside]
A dot in the sky becomes a rock in the hand. An asteroid near miss (as opposed to the more recent near hit) is the first time an object first seen in space is brought back to the laboratory. [more inside]
Tonight NASA is scheduled to launch the Kepler Mission (named after planetary legislator Johannes Kepler) with the goal of finding Earth size planets in orbit around stars in the Cygnus-Lyra region of the sky. Over the next 3 and a half years it will maintain a nearly unblinking gaze on the approximately 100 thousand stars in the region. NASA expects it to find about 50 Earth size planets, as well as hundreds that are larger. You can watch the launch live on NASA TV. [more inside]