Credit: NASA
Space Shuttle Discovery touched down for the final time this morning just before noon at Kennedy Space Center. The shuttle has spent a total of 365 days in space and traveled a total of 148 million miles on 39 missions. It is the oldest shuttle in the fleet and has always been considered NASA’s workhorse. Universe Today has a post with a crop of great photos from this last mission, as does the NASA website of course. Some cool facts from my own knowledge as well as tweets from Astrophysicist Dr. Neil deGrasse Tyson: the shuttle is traveling roughly 17,500 mph while in orbit, but it’s de-orbit thrusters slow it by only 188 mph. That’s enough to allow it to slowly drop into the upper reaches of earth’s atmosphere, at which point the air begins to take over the slowing process. The drag from the earth’s atmosphere is the only thing that slows the shuttle down from then on, including on the runway because the shuttle has no brakes, just a parachute that deploys just after it touches down. Everything in the re-entry process is meticulously calculated because they only have one chance at it. The shuttle has no power- it’s only a glider once back in the atmosphere, so everything has to be absolutely perfectly executed. The pilot is assisted by lots of powerful onboard computers that take care of most of the difficult fine-tuned adjustments, but the pilot must be able to take over if something goes wrong- the skill level required is immense. On April 12th, NASA is expected to announce the final destinations of the three remaining orbiters after their retirement. Discovery is expected to go to the Smithsonian, but that is not certain until the announcement is made. More on that at Space.com.
I feel I must also mention the alien bacteria craziness that happened over the weekend and earlier this week. NASA scientist Richard Hoover had a paper published that claimed that he had found evidence of extraterrestrial bacteria in a meteorite. Well, basically everyone else in the science community is saying he’s wrong, and I’m inclined to agree. There are a host of reasons why his claim is probably bogus, not the least of which is the fact that contamination of a meteorite by earthly bacteria is all but inevitable. Also, the paper had not completed a peer-review process before it was published, not to mention that it was published in a less-than-reputable journal that has a history of publishing error-laden work. NASA even issued a statement saying that they had nothing to do with Hoover’s paper or his claim. Most of this info comes from Phil Plait’s analysis of the situation. Get the whole story from him.
On a lighter note, enjoy this animated GIF gem, also from Plait’s Bad Astronomy blog:
Amazing footage of Discovery launch from plane/Road to Bonnaroo tonight
February 28, 2011
Some amazing and unique footage of Space Shuttle Discovery’s launch last thursday from an airplane window. The people on this plane got very lucky, as this is something rarely seen by the public. It’s one of those “right place, right time” deals. Be sure to pump it up to HD resolution.
(Via Bad Astronomy)
If you’re in Nashville and are a fan of local music, be sure not to miss tonight’s Road to Bonnaroo 8 off 8th at Mercy Lounge. This is the third year of RTB, and tonight’s lineup looks great. This event really brings out the best in these bands, as most will have some sort of trick up their sleeve. We’ve seen just about every type of gimmick you can think of at these events in the past two years. If you didn’t know, the bands’ scores are made up of 50% audience vote and 50% judge vote. Tonight’s lineup:
Evan P. Donohue
Courtney Jaye
Chancellor Warhol
Majestico
Heartbeater
Kink Ador
The Kicks
Tyler Byant
For more info on the bands/artists and sample mp3s, visit the Mercy Lounge calendar.
Credit: NASA
Space Shuttle Discovery is ready for launch later today (4:50pm Eastern/3:50 Central) on its final trip to space. This mission has been delayed extensively- it was originally scheduled to launch in November of last year, but fuel leaks and then tiny cracks discovered on the external fuel tank caused major delays. The shuttle had to be returned to the massive vehicle assembly building (VAB) for repairs that took several months. But so far all is good for the launch today. The shuttle is carrying an additional storage module (essentially a storage closet in space) to the ISS, along with an external logistics platform and a humanoid robot called Robonaut 2. Robonaut 2, known as R2 (ha!) is basically an experiment to allow engineers to determine how the robot will work in space, and how to best control it from inside the ISS. The end goal is to have a humanoid robot that can venture outside the space station and assist spacewalking astronauts with repairs and upgrades. The robot will be controlled by an astronaut inside the space station via some sort of virtual reality-like interface.
As I said, this is the last flight of Discovery. The only confirmed remaining flight is that of Endeavour, scheduled for launch in April. This mission will carry a very important piece of scientific equipment called the Alpha Magnetic Spectrometer to the ISS. The AMS will help physicists answer some of the most daunting questions in cosmology. An additional flight of Atlantis is likely, though not 100% confirmed. It would launch in June and be the absolute final flight of the Space Shuttle program.
Thundersnow/new rocket for NASA
February 9, 2011
Thundersnow is possibly the coolest-sounding meteorological term I can think of. It happens very rarely, but when it does it’s awesome. Convection strong enough to cause lighting during a snowstorm is simply amazing, as are most things that rare. Through a ridiculous stroke of luck, scientists in Huntsville, AL got a rare opportunity to study this bizarre phenomenon in-depth. As you may know, Huntsville is home to NASA’s Marshall Space Flight Center. There are meteorologists and other scientists there with a barrage of better-than-average instruments that monitored the inner-workings of the snowstorm that hit the area Jan. 9th. They got the most thorough data ever recorded for thundersnow, and observed one bolt of lightning that traveled a whopping 50 miles horizontally before hitting the ground. The fact that such a rare and interesting phenomenon happened right on top of a facility so well-equipped to study it is quite remarkable, and those scientists were very excited to be able to study the thundersnow in such great detail. I look forward to seeing what is learned from this experience. (Via Discovery News)
NASA has been presented with yet another viable commercial option for replacing the Space Shuttle’s role of ferrying astronauts to and from the space station, as well as carrying cargo. A U.S. company called Alliant Techsystems teamed up with Europe’s Astrium to draft the proposal for a new rocket called Liberty. This new rocket would combine research of the now-dead Constellation program with the proven components of the European Space Agency’s Ariane 5 launch system. Since this collaborative effort combines mostly well-proven technology, it would be both cheap and relatively quick to build, shortening the problematic gap between the last Space Shuttle flight and the first availability of commercial access to space. If it truly will shorten said gap, I’m all for it. I hope it’s really as good as it sounds, but things like this always run into unforseen problems/delays. Right now, SpaceX still has the edge simply because it’s already had 2 very successful tests of its launch system, the Falcon 9 rocket and Dragon capsule. But Liberty could give SpaceX a run for their money. Check out the promo video below. (Via Universe Today)
Planetary scale/arctic oscillation/what is 4G?
February 2, 2011
Some cool science-related stuff I’ve come across the past few days:
- Let’s be frank, the climatologists were absolutely dead wrong in their prediction of a warmer-than-average winter in the eastern US for 2010/2011. Their forecast was based on the fact that historically, La Nina winters are warmer in the eastern US. We are definitely in a La Nina winter, so what the hell has been going on? The fact is, the global climate is VERY complex, and our computer models for both short-term and long-term forecasting are still struggling to get a grasp on what’s really going to happen. The main culprit for our cold winter this year is the Arctic Oscillation. This is another large-scale weather pattern that is fairly unpredictable over the long-term, and has so far overpowered any effects the La Nina pattern has had on the southeast US. The Nashville office of the National Weather Service has been posting fairly frequent updates about this situation, so I recommend reading the latest one to get the detailed explanation you may or may not be desiring. It would appear that winter will be re-establishing its grip on TN for a few more weeks at least.
- In the past year all the major mobile phone service providers have been touting their new 4G networks. But honestly none them have speeds even close to what was traditionally defined as “4G.” The International Telecommunication Union has a set of standards for what speeds can be considered 2G, 3G, 4G, and so on. 4G used to be defined as download speeds of 100 Mbps to 1Gbps. Those kinds of speeds won’t be attained for 4 to 5 years, by most estimates. In December of 2009, the ITU changed the rules on what can be called 4G, which allowed all mobile phone service providers to instantly start labeling their slightly improved wireless broadband speeds as such. Most of these speeds are probably better described as “3.5G” or “3G+” but I honestly don’t care. I just don’t want people to think that the speeds they’ll experience on their mobile browsers is somehow leaps & bounds faster. This information came from an article on Wired that I recommend if you want more detailed info.
- I came across this amazing video clip on Universe Today on Monday, but am just now getting around to posting. The sense of scale when talking in astronomical terms is very difficult for a human mind to comprehend, so when things like this come along that really help illustrate that sense of scale, I’m fascinated. This video clip shows what several different planets, including another earth, would look like in the night sky if they were as close to us as the moon. Just wait until Jupiter shows up. (According to the comment from the creator below the video, this is actually what it would look like through a weak pair of binoculars… so what you’re seeing isn’t meant to depict the entire night sky, only about 62 degrees of it.) Be sure to click on the HD button and make it full screen.
Gliese 581g: the controversy
January 19, 2011
The controversy over the existence Gliese 581g, the exoplanet that made waves in the media back in September, is far from over. I’ve been watching Phil Plait’s Bad Astronomy blog for updates on this situation, as he’s one of the most level-headed and honest science bloggers out there. He spoke, so now I speak: the controversy rolls on, but hopefully there’ll be a solution soon. Basically, different teams of astronomers have used different methods and computer models to process the telescopic observations that led to the initial discovery. Some show the planet exists, some don’t, and apparently it has a lot to do with how ellipticalness (yes that’s a word) of the orbit of the other planets in the system. I encourage you to learn more of the specifics by reading the Bad Astronomy post.
In other news, I saw and photographed Wanda Jackson last night with the Third Man House Band, at Third Man Records. Please head over to the Nashville Cream if you haven’t yet, and read the write-up and check out my pics. It was truly something special- she’s a legend and this was by far the best band she’s played with in recent years.
Milestone in the search for earth-like exoplanets: Kepler-10b
January 11, 2011
A major milestone has been achieved by the Kepler Spacecraft- the smallest exoplanet found thus far. Kepler-10b is a small, dense, rocky world only 1.4 times the size of earth. It’s not earth-like, but it is earth-sized. This planet orbits its parent star very close- even closer than Mercury is to our sun, and it’s tidally-locked- meaning the same side always faces its star. It’s so hot that most of its surface is probably molten, and the star’s point-blank radiation would have long since “blown” away any atmosphere it might’ve had, so there’s no way it could support life. Still, this is a major milestone simply because it’s such a small planet. Detecting planets using the transit method is very difficult to begin with and the smaller they are, the harder they are to see. I’ve said this many times before, but it is literally only a matter of time, possibly only months, until Kepler uncovers a true earth-twin. That will create a fundamental shift in the mindset of the entire astronomy community from “are we alone?” toward the direction of “what are they like?”
(Via Universe Today, Bad Astronomy, and NASA)
NYE plans and some good 2011 lists
December 31, 2010
I’m not going to attempt to rundown all the party possibilities for tonight in Nashville. Just head over to the Nashville Cream and check out their NYE flow chart. There’s really nothing better for determining your course of action for tonight. Whatever you do, be safe and if you plan on drinking, arrange for a DD or a cab or Zingo or SOMETHING.
Instead of creating or linking to any “best of” lists about 2010, I thought I’d round up a couple of articles about what to expect in the science world in 2011.
Discovery News: The Biggest, Boldest, and Baddest Space Missions of 2011
Live Science: The Top Science Breakthroughs That 2011 May Bring
That’s it. I’m out. See you in 2011.
Lunar eclipse + solstice tonight, not visible in Nashville due to clouds
December 20, 2010
Credit: Fred Espenak/NASA's Goddard Space Flight Center
You must’ve heard about this by now, but I’ll mention it to make sure you know: there’s a full lunar eclipse happening tonight, and it just so happens that it’s also the winter solstice, a.k.a. the shortest day/longest night of the year. Just a coincidence, but a relatively rare one. Lunar eclipses aren’t super-rare- we get one about once every 2-3 years, but they can be pretty spectacular if the earth’s atmospheric conditions cast an eerie orange-red hue on the moon. There’s no way to know if that will happen for sure, but from my experience it happens more often than not. Unfortunately there’s a very good chance it will cloudy and/or raining tonight in middle TN, but if you’re elsewhere, good luck! It starts at about 1:30am EST, that’s 12:30am central, 11:30pm mountain, and 10:30pm pacific. For more details and a good rundown of what to expect, visit Bad Astronomy, and for a good explanation of the red/orange hue, visit this NASA article.
And I can’t help but post this comic from xkcd: I agree 100%
steve cross loves music and science 