Comet ISON entered the STEREO scene with Encke on Nov. 21 (Credit: Karl Battams/NASA/STEREO/CIOC)
As comets ISON and Encke continue toward their respective rendezvous with the Sun, they have now both been captured on camera by NASA’s solar-observing STEREO spacecraft. The image above, taken on Nov. 21 (UT) with STEREO-A’s high-resolution HI-1 camera, shows ISON as it enters the field of view from the left. Encke is at center, while the planets Mercury and Earth (labeled) are bright enough to cause vertical disruptions in the imaging sensors. (The Sun is off frame to the right.)
As cool as this image is, it gets even better: there’s a video version. Check it out below:
Animation of STEREO-A images acquired on Nov. 20-21 (Karl Battams/NASA/STEREO/CIOC)
The dark “clouds” coming from the right are density enhancements in the solar wind, causing all the ripples in comet Encke’s tail. (Source)
The position of NASA’s STEREO spacecraft relative to Earth and the Sun on Nov. 22
It’s fascinating to watch how the solar wind shapes and affects the tail of comet Encke… as ISON moves further into view, I’m sure we’ll see similar disruptions in its tail as well. (And look what STEREO-A saw happen to Encke’s tail back in 2007!)
Encke reached the perihelion of its 3.3-year-long orbit on Nov. 21; newcomer ISON will arrive at its on Nov. 28. While it seems to be holding together quite well in these STEREO images, what happens when it comes within 730,000 miles of the Sun next week is still anybody’s guess.
An erupting undersea volcano forms a new island off the coast of Nishinoshima, a small unihabited island in the southern Ogasawara chain of islands. The image was taken on November 21, 2013 by the Japanese Coast Guard.
A volcanic eruption is creating a tiny new island off the coast of Japan. The Japanese Coast Guard snapped images and video of the eruption taking place, showing the new island being formed. Footage showed heavy smoke, ash and rocks spewing from the volcanic crater. As of this writing, experts say the small island is about 200 meters (660 feet) in diameter. It is located just off the coast of Nishinoshima, a small, uninhabited island in the Ogasawara chain, also known as the Bonin Islands, about about 620 miles (1,000 km) south of Tokyo.
See a video and additional images below.
Only time will tell if the island will remain or if the ocean waters will reclaim it. According to Yahoo News, Japan’s chief government spokesman said they would welcome any new territory.
“This has happened before and in some cases the islands disappeared,” Yoshihide Suga said when asked if the government was planning on naming the new island. “If it becomes a full-fledged island, we would be happy to have more territory.”
An erupting undersea volcano forms a new island, shown by its nearest neighbor, Nishinoshima, a small unihabited island in the southern Ogasawara chain of islands. The image was taken on November 21, 2013 by the Japanese Coast Guard.This screenshot of Google Maps shows all the volcanoes in the The Japan, Taiwan, Marianas Region. Via Google Maps and the Smithsonian volcano website.
According to the Smithsonian Global Volcanism Program website, the Japan, Taiwan, Marianas Region is a very active region in the Pacific Ring of Fire and most volcanoes in this region “result from subduction of westward-moving oceanic crust under the Asian Plate. In the Izu-Mariana chain, however, the crust to the west is also oceanic, forming more basaltic island arcs (but with volcanoes that are far more explosive than oceanic hotspot volcanoes).”
A view of rivers in Montana, USA, from the ISS. Credit: ESA/Luca Parmitano.
A Canadian camera system aiming to provide near-realtime video views of Earth is readying for a launch from Kazakhstan.
If all goes well, the UrtheCast dual camera system will blast off in a Progress supply ship on Nov. 25, 2013.
This will be the world’s first ever high definition, live-streaming video platform of planet Earth from the International Space Station.
“Imagine you have a nearly live Google Earth, but it isn’t four year old data – you have data that is being refreshed all the time, with videos coming down over interesting areas where interesting events are going on, showing you what is changing, what is going on,” said George Tyc, the Chief Technology Officer at UrtheCast, in an interview with Universe Today earlier this year. “What we really hope to pull off is to change the paradigm, get the everyday person interacting and seeing the data coming down from space to see the Earth and how it is evolving over time in a way that isn’t available right now.”
Last week at the Canadian Space Society Summit, UrtheCast co-founder Wade Larson explained the camera setup will take place in phases, with Phase 1 of the project having two cameras facing the ground, with one having a fixed gaze and the other one featuring maneuverability to points of interest. These should be installed on the station sometime in December 2013, Larson said, with data coming in the first quarter of 2014.
The company’s aim is to make Earth video data more accessible to individuals and schoolchildren, who would log in on UrtheCast’s website, as well as the traditional customers of government and private companies. Additionally, a recent partnership agreement with the UN will see them offer real-time information on dynamic situations such as floods and mass movements of people during humanitarian disasters. They will also be integrating the data with live social media feeds as well as opening up their API for app developers.
The UK covered in snow, as seen on Dec. 8, 2010. Credit: NASA’s Aqua satellite.
Current sponsors on the project from UrtheCast (pronunced “Earthcast”) include Roscosmos, MacDonald, Dettwiler and Associates, the Discovery Channel, Energia, Unosat and RAL Space, Larson added.
The UrtheCast team is working in an exclusive relationship with the Russian Aerospace giant RSC Energia (NASA is not involved at all), and cosmonauts on board the ISS will install the cameras. The video data of the Earth will be down-linked to ground stations around the planet and then displayed in near real time on the UrtheCast web platform.
“We had to meet quite a strict set of requirements that the cameras are safe for cosmonauts and astronauts,” Tyc said, “as there can’t be any toxic substances because they will be inside the ISS before they are installed.”
Tyc added that it will take two spacewalks to do the full installation. The cameras are expected to last at least five years, and Tyc expects them to be up there even longer. “We’re looking at putting additional cameras up there for a second generation, and we expect to be up there for the life of the station, really,” he said.
Tyc said he thinks the social media aspect of UrtheCast will be a big part of the entire experience.
“For example, in a natural disaster or big event we’ll also incorporate videos from the ground of things going on, to experience an event in a far different way than you can now,” he said. “And it’s not being filtered through a media agency — it is what it is – and people can draw their own conclusions and add their own voice.”
Tyc said that if the concept takes off, they think this will be a shift in how people can interact with others around the world. “It could be a feeling of the Overview effect – people who go to space are have a completely changed perspective – we’re trying to bring a little bit of that to the ground,” he said.
The team said the name UrtheCast is a bit of a double entendre, as it is pronounced like “EarthCast” but also looks like “You Are the Cast” since it will be live views of planet Earth.
The "pale blue dot" of Earth as seen from Cassini on July 19, 2013.
This summer, for the first time ever, the world was informed that its picture was going to be taken from nearly a billion miles away as the Cassini spacecraft captured images of Saturn in eclipse on July 19. On that day we were asked to take a moment and smile and wave at Saturn, from wherever we were, because the faint light from our planet would be captured by Cassini’s camera, shielded by Saturn from the harsh glare of the Sun.
A few preliminary images were released just a few days later showing the “pale blue dot” of Earth nestled within the glowing bands of Saturn’s rings. It was an amazing perspective of our planet, and we were promised that the full mosaic of Cassini images was being worked on and would be revealed in the fall.
Well, it’s fall, and here it is:
The full mosaic from the Cassini imaging team of Saturn on July 19, 2013… the “Day the Earth Smiled”
“After much work, the mosaic that marks that moment the inhabitants of Earth looked up and smiled at the sheer joy of being alive is finally here. In its combination of beauty and meaning, it is perhaps the most unusual image ever taken in the history of the space program.”
In this panorama of the Saturnian system, a view spanning 404,880 miles (651,591 km), we see the planet silhouetted against the light from the Sun. It’s a unique perspective that highlights the icy, reflective particles that make up its majestic rings and also allows our own planet to be seen, over 900 million miles distant. And it’s not just Earth that was captured, but the Moon, Venus, and Mars were caught in the shot too.
According to the description on the CICLOPS page, “Earth’s twin, Venus, appears as a bright white dot in the upper left quadrant of the mosaic… between the G and E rings. Mars also appears as a faint red dot embedded in the outer edge of the E ring, above and to the left of Venus.”
This was no simple point-and-click. Over 320 images were captured by Cassini on July 19 over a period of four hours, and this mosaic was assembled from 141 of those images. Because the spacecraft, Saturn, and its moons were all in constant motion during that time, affecting not only positions but also levels of illumination, imaging specialists had to adjust for that to create the single image you see above. So while all elements may not be precisely where they were at the same moment in time, the final result is no less stunning.
“This version was processed for balance and beauty,” it says in the description. (And I’ve no argument with that.)
See below for an annotated version showing the position of all visible objects, and read the full article on the CICLOPS page for an in-depth description of this gorgeous and historic image.
2013 Saturn mosaic, annotated version.
“I hope long into the future, when people look again at this image, they will recall the moment when, as crazy as it might have seemed, they were there, they were aware, and they smiled.”
All images credit NASA/JPL-Caltech/Space Science Institute
UPDATE 11/13: CICLOPS Director Carolyn Porco describes how this image was acquired and assembled in this interview video from the World Science Festival:
This article was originally written in 2010, but we’ve now updated it and added this spiffy new video.
As you probably know, the Earth is rotating on its axis. This gives us day and night. Of course it’s impossible, but what would happen if the Earth stopped spinning? Remember, this isn’t possible, it can’t happen, so don’t worry.
Everything would be launched in a ballistic trajectory sideways
The first thing to think about is the momentum of everything on the surface of the Earth. You’re held down by gravity and you’re whizzing through space at a rotational velocity of 1,674.4 km/h (at the equator). You can’t feel it because of momentum. Just like how you can’t feel that you’re moving in a car going down the highway. But you feel the effects when you stop, or get into an accident. And so, if the Earth suddenly stopped spinning, everything on the surface of the Earth at the equator would suddenly be moving at more than 1,600 km/hour sideways. The escape velocity of Earth is about 40,000 km/hour, so that isn’t enough to fly off into space; but it would cause some horrible damage as everything flew in a ballistic trajectory sideways. Imagine the oceans sloshing sideways at 1,600 km/hour.
The rotational velocity of the Earth decreases as you head away from the equator, towards the poles. So as you got further away from the equator, your speed would decrease. If you were standing right on the north or south pole, you’d barely even feel it.
A day would last 365 days
The next problem is that day and night wouldn’t work the same any more. Right now the Earth is rotating on its axis, returning the Sun to the same position every 24 hours. But if the Earth stopped spinning, it would then take 365 days for the Sun to move through the sky and return to the same position. Half of the Earth would be baked for half a year, while the other hemisphere was in darkness. It would get very hot on the sunny side, and very cold in the shadowed side. You can imagine how that would be devastating to plants and animals. We get a hint of this at the poles, where you can experience weeks of permanent night and then weeks of permanent day. But imagine 6 months of night, followed by 6 months of day.
The Earth would become a perfect sphere
This might seem minor compared to the other catastrophes, but the Earth would become an almost perfect sphere. The Earth is currently rotating on its axis, completing one turn approximately every 24 hours. This rotational velocity causes the Earth to bulge out around its equator, turning our planet into an oblate spheroid (a flattened ball). Without this spin, gravity would be able to pull the Earth into a nice perfect sphere. This sounds interesting and probably harmless, but it’s actually a *big* problem. Because of the Earth’s bulge in the middle, the oceans are held out at the equator by 8 km. On perfect sphere Earth, the world’s oceans would redistribute, flooding many regions of the planet with an immense volume of water. We’d end up with a single continent around the middle of the planet, with oceans surrounding the north and south poles.
The Earth would no longer be tilted
The Earth’s tilt is defined by how the planet is rotating compared to the Sun. This axis of rotation defines the Earth’s seasons. But without any rotation, the concept doesn’t make sense any more. There’s still a north pole of the planet, where the radiation from the Sun is at its lowest angle, and an equator, where the light hits most directly. But there would no longer be seasons.
Super Typhoon Haiyan over the Philippines on November 9, 2013 as imaged from Earth orbit by NASA Astronaut Karen Nyberg aboard the International Space Station. Credit: NASA/Karen Nyberg
Super Typhoon Haiyan over the Philippines on November 9, 2013 as imaged from Earth orbit by NASA Astronaut Karen Nyberg aboard the International Space Station.Category 5 killer storm Haiyan stretches across the entire photo from about 250 miles (400 kilometer) altitude. Credit: NASA/Karen Nyberg See more Super Typhoon Haiyan imagery and video below
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NASA GODDARD SPACE FLIGHT CENTER, MARYLAND – Super Typhoon Haiyan smashed into the island nation of the Philippines, Friday, Nov. 8, with maximum sustained winds estimated at exceeding 195 MPH (315 kilometer per hour) by the U.S. Navy Joint Typhoon Warning Center – leaving an enormous region of catastrophic death and destruction in its terrible wake.
The Red Cross estimates over 1200 deaths so far. The final toll could be significantly higher. Local media reports today say bodies of men, women and children are now washing on shore.
The enormous scale of Super Typhoon Haiyan can be vividly seen in space imagery captured by NASA, ISRO and Russian satellites – as well as astronaut Karen Nyberg flying overhead on board the International Space Station (ISS); collected here.
As Super-Typhoon Haiyan moved over the central Philippines on Nov. 8 at 05:10 UTC/12:10 a.m. EDT, the MODIS instrument aboard NASA’s Aqua satellite captured this visible image. Credit: NASA Goddard MODIS Rapid Response Team
Super Typhoon Haiyan is reported to be the largest and most powerful storm ever to make landfall in recorded human history.
Haiyan is classified as a Category 5 monster storm on the U.S. Saffir-Simpson scale.
It struck the central Philippines municipality of Guiuan at the southern tip of the province of Eastern Samar early Friday morning Nov. 8 at 20:45 UTC (4:45 am local time).
As Haiyan hit the central Philippines, NASA says wind gusts exceeded 235 mph (379 kilometers per hour).
The high resolution imagery and precise measurements provided by the worlds constellation of Earth observing space satellites (including NASA, Roscosmos, ISRO, ESA, JAXA) are absolutely essential to tracking killer storms and providing significant advance warning to evacuate residents in affected areas to help minimize the death toll and damage.
More than 800,000 people were evacuated. The storm surge caused waves exceeding 30 feet (10 meters), mudslides and flash flooding.
NASA’s Tropical Rainfall Measuring Mission (TRMM) satellite captured visible, microwave and infrared data on the storm just as it was crossing the island of Leyte in the central Philippines, reports NASA – see image below.
NASA’s TRMM satellite data on Nov. 8 at 00:19 UTC showed Haiyan had a well-defined eye surrounded by a symmetric area of moderate rain (green ring with a blue center) with several rainbands wrapping in from the south (green arcs) while crossing the island of Leyte in the central Philippines. Credit: NASA/SSAI, Hal Pierce
TRMM data from rain rates are measured by the TRMM Precipitation Radar (PR) and TRMM Microwave Imager (TMI) and combined with infrared (IR) data from the TRMM Visible Infrared Scanner (VIRS) by science teams working at NASA’s Goddard Space Flight Center in Greenbelt, Md.
Coincidentally NASA Goddard has just completed assembly of the next generation weather satellite Global Precipitation Measurement (GPM) observatory that replaces TRMM – and where I inspected the GPM satellite inside the Goddard clean room on Friday.
“GPM is a direct follow-up to NASA’s currently orbiting TRMM satellite,” Art Azarbarzin, GPM project manager, told Universe Today during my exclusive clean room inspection of the huge GPM satellite.
NASA’s next generation Global Precipitation Measurement (GPM) observatory inside the clean room at NASA Goddard Space Flight Center. GPM is slated to launch In February 2014 and will provide global measurements of rain and snow every 3 hours – as a direct follow-up to NASA’s currently orbiting TRMM satellite; reaching the end of its usable lifetime.
Credit: Ken Kremer/kenkremer.com
“TRMM is reaching the end of its usable lifetime. GPM launches in February 2014 and we hope it has some overlap with observations from TRMM.”
“The Global Precipitation Measurement (GPM) observatory will provide high resolution global measurements of rain and snow every 3 hours,” Dalia Kirschbaum, GPM research scientist, told me at Goddard.
GPM is equipped with advanced, higher resolution radar instruments. It is vital to continuing the TRMM measurements and will help provide improved forecasts and advance warning of extreme super storms like Hurricane Sandy and Super Typhoon Haiyan, Azarbarzin and Kirschbaum explained.
Video Caption: Super Typhoon Haiyan imaged on Nov 6 – 8, 2013 by the Russian Elektro-L satellite operating in geostationary orbit. Credit: Roscosmos via Vitaliy Egorov
The full magnitude of Haiyan’s destruction is just starting to be assessed as rescue teams reach the devastated areas where winds wantonly ripped apart homes, farms, factories, buildings and structures of every imaginable type vital to everyday human existence.
Typhoon Haiyan is moving westward and is expected to forcefully strike central Vietnam in a day or two. Mass evacuations are underway at this time
Super Typhoon Haiyan imaged by the Russian Elektro-L satellite operating in geostationary orbit. Credit: Roscosmos via Vitaliy EgorovSuper Typhoon Haiyan’s ocean surface winds were measured by the OSCAT radar scatterometer on the Indian Space Research Organization’s (ISRO) OceanSAT-2 satellite at 5:30 p.m. PST on Nov. 6. The colors indicate wind speed and arrows indicate wind direction. Credit: ISRO/NASA/JPL-Caltech
Much to learn about Pluto's surface we have. (Screenshot)
Of course you do! (Who doesn’t?) And so here’s a wonderful tour of our Solar System to provide you with just the type of space you need.
A 3D animation project by Australian video artist Shane Gehlert, I Need Some Space takes us from low-Earth orbit to the Moon and Sun and then through the lineup of planets in the Solar System, using images and models from NASA to accurately depict their unique appearances. Along the way we’ll get some basic info on the planets, select moons, and a few of the various spacecraft that have visited (or are visiting) each world. Set to an intriguing string score by The Zephyr Quartet (of which Shane’s sister Belinda is a member) I Need Some Space is a mesmerizing 6-minute voyage for any space fan — myself very included.
I particularly like the “ghostly” look of Pluto, reminding us that we still have another year and a half before New Horizons reveals its true appearance to us.
Enjoy! (As with most videos, full-screening and HD-ing are strongly suggested.)
The constellation Orion photographed from orbit by Karen Nyberg (NASA)
The mighty hunter soars above the atmosphere in this photo, taken by NASA astronaut Karen Nyberg currently living and working in space aboard the ISS. One of the most recognizable constellations in night skies all across the Earth, Orion also puts on an impressive display for those well above the Earth!
Appearing here to be lying on his right side, the three stars of Orion’s famous belt — Mintaka, Alnilam, and Alnitak, top to bottom — are center frame, while his sword is nearly horizontal just to the right (the blurry center star of which isn’t a star at all, of course, but rather the enormous star-forming Orion nebula.)
Betelgeuse, as seen by the Hubble Space Telescope.
At Orion’s right shoulder is Betelgeuse, a huge red giant 20 times more massive than our Sun. Its fiery color is obvious in Karen’s photo, mirroring many of the much-closer human-made city lights visible on the ground.
In addition to featuring my favorite constellation, this photo that Karen recently shared on Twitter also serves to prove (to those few who still require evidence of such) that yes, astronauts can see stars from space. Very nicely too, I may add. The only reason they are not visible in all images is purely photographic — cameras exposing for a bright scene, like a daylit Earth (or Moon) won’t be able to capture the relatively much dimmer light of stars in the same shot, making it look like space is empty of them. Even here we can see a bit of noise in the glowing line of Earth’s atmosphere and a little blurring of edges — that’s a result of a high ISO setting to increase camera sensitivity along with a slightly longer shutter speed than your hand can easily keep stable… again, all to better capture the faint streams of photons from distant stars.
We’ve talked about Venus, the hottest planet in the Solar System, but we know things can get pretty hot here on Earth, too. You may be wondering, where on the surface of the Earth has the highest natural temperature been recorded?
The location of this world record has had some controversy, but as of 2013, the hottest spot on record was the Furnace Creek Ranch in California’s Death Valley. On July 10, 1913, weather instruments measured 56.7 degrees Celsius, or 134 degrees Fahrenheit.
The previous record of 56 degrees at El Azizia, Libya was overturned because a systematic study in 2012 discovered there were errors in the measuring methods.
Similar temperatures to Death Valley’s record have been recorded around the World:
55 degrees in Africa,
53.6 in Asia,
50.7 in Australia,
and 49.1 in Argentina.
But these are just measurements from weather stations. It’s likely there are hotter temperatures, but nobody was around to measure. NASA satellites have spotted regions in Iran’s Lut desert which might have reached 70 degrees Celsius during the summers of 2004 and 2005.
So that’d be the hottest spot on the surface, but what about the hottest natural spot anywhere in the entire planet? Now you’ve got to travel straight down 6,371 kilometers to the very center of the Earth. At the inner core, the temperatures rise to about 5,430 degrees C, or 5700 Kelvin. Amazingly, this is about the same temperature as the surface of the Sun.
Some of this high temperature comes from leftover heat from the formation of the planet, 4.54 billion years ago, but the vast majority comes from the decay of radioactive minerals inside the Earth. It was likely hotter in the past, but all the short-period isotopes have already been depleted.
I keep saying the word “natural”, but what about “unnatural”? Wondering about the hottest temperature EVER generated on Earth? Thermonuclear explosions reach temperatures of tens of millions of Kelvin. Fusion experiments have hit 500 million Kelvin. But that’s nothing.
In 2012, physicists working with the Large Hadron Collider were investigating the conditions that might have existed during the earliest moments of the Big Bang.
They generated a quark gluon plasma that had a temperature of 5.5 trillion Kelvin.
Unless aliens can do better, this is not only the hottest temperature ever recorded on Earth, it’s easily the hottest temperature anywhere in the Universe since the Big Bang itself.
According to a new study, meteors may be less dangerous than we thought, thanks to Earth's atmosphere. Credit: David A Aguilar (CfA).
How did life on Earth originally develop from random organic compounds into living, evolving cells? It may have relied on impacts by enormous meteorites and comets — the same sort of catastrophic events that helped bring an end to the dinosaurs’ reign 65 million years ago. In fact, ancient impact craters might be precisely where life was able to develop on an otherwise hostile primordial Earth.
“This is bigger than finding any dinosaur. This is what we’ve all searched for – the Holy Grail of science,” Chatterjee said.
Our planet wasn’t always the life-friendly “blue marble” that we know and love today. At one point early in its history it was anything but hospitable to life as we know it.
“When the Earth formed some 4.5 billion years ago, it was a sterile planet inhospitable to living organisms,” Chatterjee said. “It was a seething cauldron of erupting volcanoes, raining meteors and hot, noxious gasses. One billion years later, it was a placid, watery planet teeming with microbial life – the ancestors to all living things.”
Exactly how did this transition happen? That’s the Big Question in paleontology, and Chatterjee believes he may have found the answer lying within some of the world’s oldest and largest impact craters.
After studying the environments of the oldest known fossil-containing rocks in Greenland, Australia and South Africa, Chatterjee said these could be remnants of ancient craters and may be the very spots where life began in deep, dark and hot environments — similar to what’s found near thermal vents in today’s oceans.
Larger meteorites that created impact basins of about 350 miles in diameter inadvertently became the perfect crucibles, according to Chatterjee. These meteorites also punched through the Earth’s crust, creating volcanically driven geothermal vents. They also brought the basic building blocks of life that could be concentrated and polymerized in the crater basins.
In addition to new organic compounds — and, in the case of comets, considerable amounts of water — impacting bodies may also have brought the necessary lipids needed to help protect RNA and allow it to develop further.
“RNA molecules are very unstable. In vent environments, they would decompose quickly. Some catalysts, such as simple proteins, were necessary for primitive RNA to replicate and metabolize,” Chatterjee said. “Meteorites brought this fatty lipid material to early Earth.”
How organic compounds in crater basins were encapsulated in lipid membranes and became the first cells (Chatterjee)
Based on research in Australia by University of California professor David Deamer, the ingredients for all-important cell membranes were delivered to Earth via meteorites and existed in water-filled craters.
“This fatty lipid material floated on top of the water surface of crater basins but moved to the bottom by convection currents,” suggests Chatterjee. “At some point in this process during the course of millions of years, this fatty membrane could have encapsulated simple RNA and proteins together like a soap bubble. The RNA and protein molecules begin interacting and communicating. Eventually RNA gave way to DNA – a much more stable compound – and with the development of the genetic code, the first cells divided.”
And the rest, as they say, is history. (Well, biology really, and no small amount of chemistry and paleontology… and some astrophysics… well you get the idea.)
Chatterjee recognizes that further experiments will be needed to help support or refute this hypothesis. He will present his findings Oct. 30 during the 125th Anniversary Annual Meeting of the Geological Society of America in Denver, Colorado.
