Mercury Mapped for the First Time

mercury_mapMercury is the smallest planet in the Solar System and has the closest proximity to our sun. As a result, it’s one of the most neglected when it comes to scientific study. While Mars, Venus, Jupiter and Saturn have been probed and photographed in exquisite detail during the space age, the closest planet to the Sun has had to make do with a few flybys from the Mariner 10 spacecraft in the early 1970s.

However, that is now changing thanks to NASA’s Messenger spacecraft. In addition to confirming the existence of ice and organic molecules back in November, the probe has also transmitted thousands of images of the planet over the past year. These have allowed NASA personnel to construct the first high-resolution maps of the planet, its own high-resolution maps, down to the scale of kilometers.

Global Map Of Mercury From Messenger.According to David Blewett, a scientist at the Applied Physics Laboratory at Johns Hopkins University and part of the Messenger team, part of the reason it has taken more than 30 years to revisit the planet since the Mariner 10 flybys was because a lack of public interest. Messenger, he claims, has changed all that. Speaking ahead of a briefing on Friday at the annual meeting of the American Association for the Advancement of Science in Boston, Blewett had this say:

“Messenger has revealed Mercury to be a fascinating, dynamic and complex world. We know now that it is an oddball planet. It’s the smallest of the eight planets but has the highest density. The interior structure is different than the other planets. The geologic surface is different to the moon and Mars. The surface composition is enigmatic because … it consists of rock types that we don’t have much experience with. It has a global, Earth-like magnetic field, Venus and Mars do not.”

messenger_mercuryThe new global map is an enhanced image that shows the different compositions of rocks on the surface of Mercury by color-coding them. The more orange areas are volcanic plains while the make-up of the rocks in the deep blue areas is unknown. Though Messenger was able to detect an abundance of individual elements on Mercury’s surface – including iron, titanium, sulphur and potassium – without rock samples to study, scientists cannot determine the exact compounds or minerals in which those elements are arranged.

But the biggest surprise came on the surface, where there was an abundance of relatively volatile elements such as potassium and sulphur was seen to be very high. Most of the models for the formation of Mercury predict that these elements should have evaporated away during the planet’s formation. So in addition to learning more about its surface features, scientists are now presented with the opportunity to study and learn more about the planet’s early history as well.

But of course, much of that information and research are going to have to wait for future generations of Rovers. These are likely to be similar in nature to Curiosity, in that they are remote controlled, networked robots with internal labs. But unlike those currently combing the Red Planet, these ones will have to be able to withstand surface temperatures in excess of 400 C and some dangerous surface activity. Hard to know exactly when NASA will be rolling any of those out, but the simplest answer is, not too bloody soon!

Check out the video of Mercury’s new color map as it rotates to show its fully-detailed surface. And FYI, this bit of breaking news has become my 900th post! Woohoo!

Source: gaurdian.co.uk

Update on Asteroid Apophis: No Apocalypse by 2036

apophisDiscovered back in 2004, the Apophis asteroid garnered lots of attention when initial calculations of its orbit indicated that there was a 2.7 percent chance that it would hit Earth when it did a flyby in 2029. After running additional calculations based on the asteroids data, scientists were able to rule out a 2029 impact, but there was still a remote possibility that it might hit Earth during another flyby in 2036. However, that estimate has also been revised.

Thanks to the European Space Agency’s Herschel Space Observatory, a number of thermal infrared observations were captured of Apophis at different wavelengths. Taken together with optical measurements, Hershel was able to refine earlier estimates of the asteroid’s properties, which included its overall diameter. Initially, it was estimated to be 270 m on a side but now stands at a robust 325 m, an increased which translates into a 75% increase in its volume.

The thermal readings on the asteroid also provided a new estimate of the asteroid’s albedo, which is the a measure of its reflectivity. Knowing the thermal properties of an asteroid indicates how its orbit might be altered due to subtle heating by the Sun. Known as the Yarkovsky effect, the heating and cooling cycle of a small body as it rotates and as its distance from the Sun changes can instigate long-term changes to the asteroid’s orbit.

All of this taken together, has allowed NASA, the ESA and other space authorities to rule out the possibility of an impact by 2036 as well. Don Yeomans, manager of NASA’s Near-Earth Object Program Office at the Jet Propulsion Laboratory:

“We have effectively ruled out the possibility of an Earth impact by Apophis in 2036. The impact odds as they stand now are less than one in a million, which makes us comfortable saying we can effectively rule out an Earth impact in 2036. Our interest in asteroid Apophis will essentially be for its scientific interest for the foreseeable future.”

But the flyby on April 13, 2029 will be one for the record books, says NASA. On that date, Apophis will achieve the closest flyby of an asteroid of its size when it comes to within 31,300 kilometers (19,400 miles) of the Earth’s surface. And in the meantime, an smaller asteroid (40 meters in diameter) named 2012 DA14 will make an ever closer flyby as it passes Earth at a distance of 27,670 km (17,200 miles).

So people can rest, safe in the knowledge that no asteroids are likely to hit us anytime soon. But at the same time, apocalyptics can rest assured that there will be plenty of remote chances to exploit for the sake of their unusual brand of paranoia. As Yeomans said:

“With new telescopes coming online, the upgrade of existing telescopes and the continued refinement of our orbital determination process, there’s never a dull moment working on near-Earth objects.”

Second Asteroid Makes Even Closer Pass to Earth

CometThank you to Raven Lunatick for bringing this to my attention! It seems that while everyone was watching Toutatis the other day, another asteroid slipped past Earth with few noticing. Luckily, researchers had been observing this newly-discovered asteroid, named 2012 XE54, since Dec. 9th and knew that like the much larger Toutatis, this one would pass Earth by without incident.

But whereas Toutatis avoided Earth by a whopping 7 million kilometers, roughly 18 times the orbit of the Moon, XD54 passed within 230,000 km of Earth. That’s within the Moon’s orbit in case you don’t know, which is a far closer shave for those keeping track!

Granted, this asteroid was substantially smaller than Toutatis, measuring in at 36 meters at its widest point compared to Toutatis’ hefty 4.5 km length. However, that does not mean that such a small object does not have considerable destructive power. For the sake of perspective, consider the case of the asteroid that landed in Siberia in 1908. Here, the stellar object in question was similar size to XD54, and flattened some 2000 square km of forest when it exploded above Siberia’s Podkamennaya Tunguska River.

In addition, XD54 shares another characteristic to the much larger Toutatis, in that its orbit is similar to our own. Scientists now predict that it takes the stellar object 2.72 years to complete a single lap of around the sun. This means that, like Toutatis, we can expect to see it again in the not-too-distant future. However, that’s not likely to be for many years and there’s no indication of if and when it will collide with our planet. So as far as the Doomsayers are concerned, humanity just might make it out of 2012 alive!

Source: DNAIndia.com

2001: A Space Odyssey

Once more, a movie that was both a novel and a screenplay. But, unlike others I reviewed (Blade Runner, Dune), Space Odyssey was actually a movie that was later novelized. Not the cheap, dime-store novelizations that seek to cash in on the movies’ success mind you. No, this was a case of collaboration, where a scientist-turned-writer (Arthur C Clarke) collaborated with a filmmaker (Stanley Kubrick) to produce a movie, with the former writing the novel version simultaneously, but which was released after. And the combination worked pretty well, if I do say so myself! Clarke offered up the hard science and futurism while Kubrick brought the cinematic vision and directorial talent. But to be honest and fair about it, the novel was just not as good. I say that with all love and respect for Clarke, may he rest in peace. But that’s just the way I felt, having seen the movie and read the book. Whereas the movie was raw and emotional when it needed to be, capturing the awe and terror of space exploration and the unknown, Clarke approached these things with a sort of stoic detachment. And whereas the movie was a bit more complex in its depiction of technology and artificial intelligence, Clarke’s views were much more straightforward. But that was to be expected. Clarke was a futurist, after all, seeing humanity as perfectible through progress and the scientific method. Things like human nature, emotion, instinct and the fallibility of science were not really things that showed up on his radar much.

But that’s something for the literary reviews. Right now, it’s the movie that need dissecting. So once more, lets get into this sci-fi, cinematic classic and see why it was such a big hit.

(Background—>)
Even though it received mixed reviews when first released, 2001 has gone on to become one of the highest ranked movies of all time. Fans, the Academy Awards, and numerous polls place it in the top 10, with the Moving Arts Journal going as far as to rank it the number one movie of all time in 2010. Its visual style and its classical score, along with its thematic breadth and scientific realism, make it a favorite of movie-goers, critics and cinema cultists alike. And time doesn’t appear to have diminished this much. Of all Kubrick’s films, 2001 is often ranked as his greatest accomplishment, though there has been no shortage of competition for the top slot! For Clarke, the novels that followed the movie’s release were largely responsible for him being rocketed to fame as one of the “Big Three” of science fiction, alongside Robert A. Heinlein and Isaac Asimov. In addition, the success of the original novel Clarke to pen three sequels, 2010: Odyssey Two, 2061: Odyssey Three, and 3001: The Final Odyssey, the first of which was also made into a movie (for a more in-depth look at these novels, see my review, Clarke and his Odysseys)

(Content—>)
The film opens with the classic score, playing in front of planet Earth during a sunrise. I don’t imagine I need to tell anyone what a powerful opening this is. We see the planet Earth from space, is all its glory, and the music instantly captures the feeling of awe and wonder that defines the film. We then cut to the African desert, during what is referred to as “The Dawn of Man”, where a tribe of herbivorous apes are foraging for food in a hostile landscape. Through a series of images, we get a pretty clear view of their world and how they are struggling to survive in their harsh environment. All of their time is dedicated to foraging for food and water, they are in a constant state of competition with other animals and other tribes of simians (not to mention being preyed upon by hungry leopards!) However, their world changes forever when they wake up one morning and find that something in their environment has changed: a tall, black monolith has appeared out of nowhere and now sits in the middle of their encampment. Naturally, they begin to freak out and throw things at it, crying out loud and generally panicking in its presence. Slowly, they come to accept its presence and even begin to run their hands along its smooth surface, realizing that it does not pose them any immediate harm.

And I got to say, this scene was masterfully done! It’s perhaps the first example of everything the movie does right. The reactions of the actors playing the simians is perfect. How they initially panic and only slowly, very slowly, begin to calm down and even become intrigued by the monolith. The music also serves to heighten the feeling of uncertainty to the point where little is happening on screen, but we known in our hearts that something terribly significant is really going on. This music comes up again later in the movie, illustrating a direct parallel between when man’s early ancestors encountered the unknown in their own world and modern humans do the same with space exploration. It’s scary and exhilarating all at once.

Shortly thereafter, we see the simians going about their business as usual. But then, while picking amongst a set of dry bones, one of the tribe has a searing burst of revelation. Picking up what looks like an animal femur, he begins to realize (slowly, of course) that he can club things with it. As the scene picks up, the music reaching a crescendo, we get the same sort of feeling as when the apes encountered the monolith, except in reverse. What begins as a sort of tame display mounts until the ape is overcome with feeling, thrashing and smashing everything around him. And then, the camera cutting between the bones and a falling animal, we see him applying the lesson by killing another animal with it! That night, the tribe eats meat, and the transition from herbivores to omnivores has begun. We also see a frightening scene the next day, as a rival group of simians encounters them at a watering hole. But whereas the two groups would just shout at each other until one retreated, this time an ape is killed. The bone-carrying ape has passed on the lesson of the club to his kin, and they take turn beating their rival until he’s dead. The scene ends with a silent moment as the ape tosses the bone in the air, it swirls around and around, falling ever towards Earth… And then boom! The bone becomes a satellite, and the skies have become space in orbit around planet Earth.

Where do I begin? Once again, the sheer amount of significance in this scene. We are given, sans dialogue and through a series of brief but poignant scenes, a glimpse at how humanity came to evolve. From being herbivores who had to claw and scratch for every inch to omnivores who asserted control over their environment through the use of tools. And what accounted for this leap? A simple act of deductive reasoning, but clearly, higher forces appear to have played a part… Oooooo! Yes, that’s the impression we are meant to have, that the sudden appearance of the monolith and how it coincided with a jump start in evolution was no coincidence. But since there is no dialogue, all of this is going on in our minds, and it was bloody effective!

Cue part II, named TMA-1. The story begins to unfold then as we get some shots of life in orbit around Earth, aboard the international space station, and then moving through a drawn out montage to the Moon. This is perhaps one weakness in the movie, the many scenes that seem to go on and on, classically scored and containing no dialogue. They are pleasant, and you get an obvious sense of scope and breadth from them, but for the most part… they’re kinda boring. But as I realized when I first watched it, the movie was made in a time when people actually had attention spans! In addition, the idea is to give us a glimpse of the future which is both cheery and wonderful, showing how far we’ve come and how technology has made so much possible. They also pace the movie between its more dramatic bits, where there’s meaningful interaction or drawn out scenes where everything is tense and dramatic. In any case, as I said, the story unfolds. We are told in no uncertain terms that the Cold War is still on, that the Americans have a colony on the moon that is being quarantined and the Russians suspect something is up.

We then see Doctor Heywood Floyd, chairman of the National Council of Astronautics (a futuristic version of NASA) travel to the Moon where he discusses with his peers how the quarantine story is not holding up, followed by another, though comparatively brief, scene where he is being shuttled out to the surface so he (and the audience) can see exactly what it is they are hiding. Some dialogue serves to fill in the blanks, explaining what the real situation is around the colony and what TMA-1 stands for. Basically, they’ve found an object which appears to have been “purposefully buried” millions of years ago. Its designation is “Tycho Magnetic Anomaly-1”. Everything becomes clear when they set down and begin walking around the excavation in space suits, and we see that what they’ve uncovered is in fact a monolith, one that is identical to the monolith encountered by the apes… I’m getting the tinglies! I should also not that this scene is a perfect example of the movie’s scientific realism. Not a trace of sound is heard as the astronauts are busy walking about, save for their breathing and the rumpling of space suits. This is in keeping with the physics in the vacuum of space, no atmosphere equals no sound. But then, each of them is momentarily deafened by a huge burst of radio-static that sets their teeth on edge! When it passes, they all look tellingly at the monolith…

Cut ahead to Part III, which is named Jupiter Mission. Here we see the spacecraft Odyssey for the first time as it slowly passes beyond the reaches of the inner solar system on its way to Jupiter. The crew are just waking up and David Bowman, one of the pilots, is busy jogging around the ship’s centrifugal section. His counterpart, Frank Poole, is also up and about soon, and the two are going through some expository things. This includes an interview which they are watching, newscasters back at Earth having sent questions and taken their answers while editing out the time delay. The interview features as segment where they talk to the ship’s computer, HAL 9000, they eerily calm-voiced robot with the red camera eyes. He seems like a swell guy, and boasts that like all 9000 series models, he is error-free. Can you say foreshadowing? We get treated to some more exposition as HAL discusses some misgivings he has about the mission to David, mainly over the amount of secrecy and how its official purpose doesn’t add up.

And then, to get the plot rolling again, HAL announces that he’s found a malfunction in the ship’s main array. The pilots look it over and determine there’s no problem, and the folks back at Earth say the same. Apparently, HAL has made an error! While discussing their options in the privacy of one of the shuttle pods, Bowman and Poole decide that it might be best to shut HAL down and go on without him. But HAL can see them, and reads their lips. We get a nice, big closeup of his big red eye… and are worried! As well we should be, because when Poole goes out to put the array back together, his pod suddenly turns on him. Bowman is then summoned to one of the ship’s terminals and sees a video feed of Poole flying off into space, his oxygen hose broken and his body flailing. He then jumps into another pod, forgetting his helmet, and sails off to rescue Frank’s body. But when he returns to the ship, HAL refused to let him in. “I’m sorry Dave, but I cannot do that…” he says, a line that lives on in infamy! So Bowman decides to take a huge risk and open the ship’s secondary airlock, where he then blows out the pod’s door and is catapulted into the ship’s airlock. Before he can be sucked out again, he grabs hold of the controls and seals himself shut and re-pressurizes the room. While this might sound a tad far-fetched, it was actually very realistic. For one, there’s no sound until air starts flooding back into the airlock. Second, Poole’s body is tossed about like a rag doll by the explosive decompression and he barely survives it (clearly they used a real one).

Strapping into a spacesuit, Bowman then stalks around the ship while HAL tries to “reason” with him. Basically, he’s doing the sanitized, stoic version of begging for his life, and he’s right to because Bowman’s first stop is HAL’s circuit room. Slowly, HAL begins to shut down as David pulls more and more of his components out. A frightening scene, as we are basically witnessing the AI’s version of being lobotomized. As its happening, he keeps saying “I can feel my mind going…” until he finally breaks down and begins singing “Daisy” in a faltering voice. When Bowman is finally done, one of the monitors come on with a transmission from Earth. As if there could be a worse time, the true nature of the mission is now being explained. Seems the monolith on the moon was sending out a transmission, and its destination… Jupiter!

Thus begins the final part of the movie. The title is certainly indicative: Jupiter and Beyond the Infinite. This entire section is strictly visuals, that same frightening music in the background, and not a touch of dialogue. The entire climax is told with the special effects and facial expressions, conveying incredible awe, wonder, and terror. Thankfully, Clarke’s novel version told audiences what they needed to know. Essentially, Bowman has arrived within the vicinity of Jupiter’s Jovian moons, and found yet another monolith! This one is bigger, much, much bigger. And it appears to be moving around in response to his presence. When he gets close to it in one of the Discovery’s pods, it pulls up horizontally, its black profile disappearing into the dark of space. The camera then pans upwards, and a visual light show begins. We are told in the novel, and the second movie, that Bowman’s last words before “disappearing” were: “My God, its full of stars!” Like I said, no utterances in the movie, Bowman simply seems to have entered the monolith and is shooting through space and time. We get several stills of his face frozen in looks of terror, the colors becoming vivid and changing drastically with each frame. He also seems to be seeing incredible things, things that the audience can only guess at. But, for my money, he appears to be witnessing the birth of stars, the formations of planets, and the beginnings of life itself. In technicolor!

Finally, the light show ends and Bowman appears to be hovering over what appears to be an alien landscape. The colors are still psychedelic, but everything returns to a normal chromatic pattern when he finds himself inside a some kind of living space. At first, he’s himself, in his spacesuit walking around. He then sees himself change into an older man, eating a meal at the table, then transitions to the bed where he is a very old man and clearly near death. He then looks up and sees himself as a child still in the womb. More curious visuals the audience is left to puzzle over. Is he witnessing his own lifespan, or is this a metaphor for his death and rebirth as something new? According to the novel, the latter appears to be the case. He’s not sure why or even how, but making contact with the monolith has changed him. He’s become The Star Child, and he can see home from where he now sits. Earth, the moon, the stars, and the entire cosmos. Much like the apes who had undergone a great change in their own time, he too has achieved a cosmic leap in evolution, all because of his contact with an artifact that no one can even begin to understand.

(Synopsis—>)
As I’ve said before, this movie was masterfully done in the way it relied on visuals and music to tell the story. This was not always easy considering how complex the material was and how deep the themes ran. Almost without words, Kubrick and Clarke told said volumes about human evolution, consciousness, evolution, technology, and artificial intelligence. And it all ran together, in spite of what you might think. HAL’s malfunction was no stray commentary on the dangers of AI. If anything, it was a commentary on the dangers of intelligence, as personified by the apes who suddenly became very violent once they learned how to use basic tools. Bowman’s death and transformation was also a commentary on this process of evolution, how it can be painful and sometimes might involves a great deal of loss. And last, but certainly not least, there is the awe and wonder of it all. Nothing frightens more than the unknown, and nothing fails to inspire us more. But always there is danger in peaking around those corners. And what better way to personify this danger than through a big, black, monolith? Yep, I tell ya, those towering, featureless shapes still inspire fear and intrigue for me today. As does the classical store! If you haven’t seen it, do so. And for the love of God, do it sober! You need to be clear of mind to appreciate all the nuances of this movie. Never mind that it was made in 1968 and many people were high when they first saw it!

2001: A Space Odyssey:
Entertainment Value: 7/10 (bit slow, can be incomprehensible at times too)
Plot: 10/10 (oh yeah!)
Direction: 10/10 (double oh yeah!)
Total: 9/10