So there has been some excitement and confusion lately over a signal discovered by SETI researchers after they aimed one of their radio telescopes toward “objects of interest” discovered by the Kepler mission. These are possible exoplanet discoveries, but they’ve yet to be confirmed by other telescopes. (These are called Kepler Objects of Interest, or KOIs.) Until now, SETI researchers have been blindly aiming their telescopes all over they sky listening for possible alien radio signals. Now that the Kepler team has a few KOIs that might be habitable, it makes sense for SETI to narrow their search and start listening specifically in the direction of those KOIs. Well, they did just that, and they found an interesting signal! One that is clearly not just natural background noise. But, that signal is almost definitely interference from one of our own satellites, because the signal still shows up even when they aim the radio telescopes away from the exoplanets. So, don’t let anyone fool you- SETI has NOT discovered an alien radio signal.
As he always does, Dr. Phil Plait of Bad Astronomy lays out the truth on this. Universe Today has an excellent post on it as well.
Kepler finds earth-sized alien planets/Some amazing volcano photos
December 21, 2011
Credit: NASA
The Kepler team at NASA announced yet another exciting discovery yesterday: the first confirmed earth-size alien planets, Kepler 20f and 20e. The mission has found other exoplanets that pretty close to earth-size, but these two are by far the closest yet. What really befuddled me about this announcement was that that in addition to those two smaller, rocky worlds, there are three bigger gas-giant or super-earths in this system as well. No only that, but all five of these exoplanets’ orbits would fit inside our own Mercury’s orbit around our sun! That’s a lot of planets crammed into a tiny area! Of course that also means that these planets are scorching hot- far too hot to be habitable. But, it’s very reassuring to confirm that Kepler can positively identify alien planets that are earth-size and even tad bit smaller (Kepler 20e is about 87% the size of earth). As usual, Dr. Phil Plait at Bad Astronomy has a very good explanation of the whole thing. And I’ll also point you toward this article on space.com about the likelihood of us finding a true earth-twin within the coming year.
And now I will simply tell you to go take a look at this amazing set of volcano photographs and have a a few eyegasms. You’re welcome.
Kepler finds potentially habitable exoplanet 2.4x size of earth
December 5, 2011
Should’ve gotten to posting this earlier today but I was waaay too busy.
Very exciting news in the science world today- NASA’s Kepler mission has been very busy lately, finding exoplanets left and right. Problem is, those observations have to be followed-up and duplicated by other telescopes, usually ground-based. Thus, it takes a while to fully confirm the existence of an exoplanet discovered by Kepler. Finally though, they’ve found one that is close to earth’s size, and orbits a star similar to our sun within its habitable zone. It’s not quite the “holy grail” of planet hunting because the planet is 2.4 times the size of earth, but it’s getting us ever-closer to the discovery of a true earth-twin. This is awesome. It’s only a matter of time…
Credit: NASA/Ames/JPL-Caltech
For more, check out this article on Space.com, or this article on Discovery News.
Mars Science Laboratory launches/other badassery
November 30, 2011
That is video of the final separation of NASA’s new Mars Science Laboratory rover (named Curiosity), sending it on its way to Mars. The probe launched successfully this past Saturday atop an Atlas V rocket, and will reach Mars in August of 2012. If you follow this blog you’ll know that I’ve mentioned this probe excitedly before- that’s because this is the biggest, boldest of all the robotic rovers we’ve sent to Mars. It’s about the size of a small SUV and it will be looking for evidence of conditions that may have been conducive to the development of microbial life, past and present. Important distinction: the probe is NOT searching for life itself, just for evidence that the planet may have been habitable in the past or maybe even the present. August 2012 will be a tense month for NASA and all following this probe’s progess, because the final landing stages are immensely tedious and complex. (See the landing animation below.) For now though, we just sit and wait as the probe zips through space and the engineers make the final adjustments to its trajectory. For some more expert commentary on this mission, check out Bad Astronomy or Universe Today.
Since I probably won’t be posting again until this Friday’s “A Few Good Shows” post, here are a couple more videos full utter badassery:
“Jetman” Yves Rossy flies alongside fighter jets on his jetpack. It doesn’t get much cooler than that…
Nothing like some shirtless 9-year-olds totally nailing “Crazy Train”
Monday videos: cats and space
November 14, 2011
Few words today, simply two videos to entertain you for different reasons.
HD timelapse footage of earth from the International Space Station. This has been making the rounds on the interwebs already, so you’ve probably seen it, but it’s just too good not to post. The city lights combined with the aurorae make this simply jaw-dropping/drool-inducing. Be sure to set HD to “on” and make it fullscreen!
And now let us take a quick look into the exciting new world of “catvertising”…
(Via yewknee’d)
Timelapse videos of auroras from the space station
October 20, 2011
This post needs very few words. Just sit back and enjoy these gorgeous timelapse videos shot from the International Space Station. They’re of the Aurora Borealis and/or Aurora Australis. Be sure to click on the resolution and choose the HD version, and make that shit fullscreen! (All via Universe Today)
Neutrinos faster than light? Let’s be realistic.
September 26, 2011
Of course the big news about the “faster than light” neutrinos would have to break right in the middle of Soundland, when I was insanely busy running around taking literally thousands of photos for 4 days straight… but the above image pretty much sums up how I feel about it. There’s an old saying in science- extraordinary claims require extraordinary evidence. However, in this case we’re not dealing with crackpot fringe scientists, we’re dealing with CERN scientists. In other words these people are very disciplined and have ruled out just about every other statistical anomaly, measurement inaccuracy, or other explanation for their results. So the fact that they measured neutrinos that appear to have traveled faster than light is not in question. The key word there is appear. And this is such a massively important discovery that the scientists involved are asking for comparison from the rest of the worldwide scientific community. They want others to repeat their experiments and see if they get the same result. When you’re questioning one of the most iron-clad, thoroughly proven theories of science such as General Relativity, you’d better have rock-solid, repeatable evidence to support your claim. No matter what the outcome of this, it will fascinating to sit back and watch as it unfolds. Here are a few links to interesting articles I’ve found relating to this news:
Artist's concept of NASA's new SLS
Today NASA Administrator Charles Bolden and members of Congress announced an agreement to build the most powerful rocket in US history. The launch system (or SLS for space launch system) is intended to take astronauts beyond low-Earth orbit, including asteroids and Mars. The SLS is a derivative of the space shuttle in that it uses 5 space shuttle engines and a fuel tank based on the design of the shuttle’s external fuel tank. There will also be two solid rocket boosters on either side of the main stack. The key difference is that the multi-purpose crew vehicle (MPCV), which is already under construction, will sit atop the entire stack, and will have an escape rocket system that will enable the crew to safely escape almost any type of failure or explosion at any stage during ascent. In many ways this new system is a hybrid of the Apollo-era Saturn V system and the space shuttle. For more info check out the official story on NASA’s website.
This is an exciting announcement, and it’s good to know that many aspects of this new SLS are based on or directly utilize existing technology. This means that the overall cost should be significantly lower than if we’d tried to build something entirely new. I’m glad there was bipartisan agreement that led to this decision being made relatively quickly. The target date for the initial launch of this new SLS is 2017. That seems realistic and I certainly hope it is. Humanity is long overdue to reach beyond low-Earth orbit and explore deep space.
New somewhat Earth-like exoplanet/Symphony of Science
September 5, 2011
It’s been waaaay too long since I had a good space/science post. So here are a couple of interesting things that have already been floating around the science blogs for a few days, but you may not have heard about unless you’re as big of a nerd as I am. 🙂
- We have another interesting exoplanet discovery worth talking about. It’s another super-Earth that sits within the habitable zone of its parent star- that is- liquid water could exist on its surface. At least, provided there is sufficient cloud cover. This planet, which has the fascinating title of HD 85512 b, is near the warmer edge of the habitable zone, which means there would have to be sufficient cloud cover to reflect some of the incoming radiation from its star, lest it have a runaway greenhouse effect that would make it very Venus-like (scorching hot and covered in dense, toxic clouds). This world is about 3.6 times the mass of Earth, but it was detected using the radial velocity method rather than the transit method, so we only know its mass, not its size. But if it’s a rocky world and its mass is 3.6 times that of Earth, it’s bound be a good bit bigger than Earth. Granted, we don’t know anything for sure about the atmospheric makeup of this exoplanet because we don’t have any instruments capable of detecting that yet. The radial velocity method detects planets orbiting a star by seeing the tiny gravitational wobble the planet exerts on its parent star. If we eventually aim a telescope such as Kepler at this star, and the planet transits the star, we’ll then know its approximate size and may even be able to make a better judgment on its atmospheric makeup. Until then, though, we have to rely on computer models to speculate what the air might be like. For more info see: Universe Today or National Geographic.
- You may recall Symphony of Science from back when Jack White’s Third Man Records released a 7″ vinyl single of the track “A Glorious Dawn ft. Stephen Hawking.” Phil Plait of Bad Astronomy mentioned in a post yesterday that John Boswell, creator of Symphony of Science, has put 11 tracks in a compilation on bandcamp for free (or name your own price). So go snag it now and throw the guy a few bones while you’re at it. It’s a pretty awesome idea, and I’m obviously a fan of anything that puts music and science in the same sentence.
Credit: NASA (Click for full size)
NASA just released some pretty interesting news this afternoon. The Mars Reconnaissance Orbiter (MRO) has been taking photos of the surface of Mars for many years, and scientists have seen what looked like gullies on the surface. But, they had no way to confirm whether those gullies were caused by water or just sand sliding down a slope, or by frozen CO2. There is still no way to confirm for certain that what we’re seeing was caused by flowing water on the surface, but evidence is starting to lean in that direction. These dark finger-like features have been seen changing shape before- but on the colder side of the slope that faces away from the sun most of the day. That would point toward the gullies being caused by frozen CO2. These new images are of features on the warmer sun-facing side of the slopes, meaning the likelihood of them being caused by flowing liquid water is far greater. The most important thing here is to remember that this is NOT confirmation of liquid water on the surface of Mars. It is, however, highly suggestive of liquid water on the surface of Mars. This is exciting news because if it is indeed liquid water, there’s a much better chance that microbial life might still exist. Another important thing to remember is that we already know water exists on Mars- we’ve seen it as ice, both directly (Phoenix lander) and indirectly (radar soundings from MRO indicating water ice below the surface). The key to life though, is liquid water.
As usual, Dr. Phil Plait has a very good explanation of all this on Bad Astronomy, so I recommend checking that out. The NASA article can be found here.
steve cross loves music and science 