A random image of a mountainous landscape may be beautiful, but without some context and background information, i.e. metadata, you will likely have no idea where in the world the picture was taken, or even exactly what it is that you're looking at. Questions such as "How tall is that mountain?" "How far away is it from the photographer?" or "Where and when was this picture taken?" are all virtually impossible to answer just by looking at the image.
The openFITS project represents a step towards removing some of the mystery surrounding image processing of the X-ray data from the Chandra Observatory. As the Science Imager for Chandra, I'm often asked if astronomical objects appear in optical images as they would if we could somehow fly to these objects and view them with our own eyes. Of course, this is usually asked in relation to optical images, such as those from Hubble, because human eyes cannot actually see X-rays!
While most of the world was focused on that little soccer tournament in South Africa, astrophysicists were involved with their own form of competition last week. As they do every year, experts from around the globe gathered to conduct the Chandra Peer Review process. This is the way that astronomers figure out what targets Chandra will observe over the course of the next year. Most major telescopes – such as Hubble and Spitzer -- have a similar process. And as they say about democracy, it's not a perfect system but it’s better than just about any other.
Recently, I attended a memorial service for Geoffrey Burbidge, who was my thesis advisor many years ago. He was eulogized for his pioneering work in several fields of astrophysics. In the 1950's, he was the first to determine the enormous energies involved in the giant radio sources, calculations still used today in studying the process of black hole feedback in galaxy clusters. He and his wife Margaret were leaders in documenting violent events occurring in what they called active galactic nuclei, or AGN, as they are commonly called today. They also paved the way for work that eventually led to the conclusion that the universe is dominated by dark matter, a peculiar substance whose nature is still not understood.
There are a lot of reasons why people like astronomy. For some, it's the topics it covers like black holes, exploded stars, and distant planets. For others, it's the sense of awe that the cosmos inspires. There are also lots of people that just think the images are beautiful and worth gazing at. And, for most, it’s some combination of these and others that make them want to learn more about astronomy.
This week, astronomers have gathered in the balmy city of Miami for the 216th meeting of the American Astronomical Society meeting. There are some interesting Chandra results – the new image of N49 and the latest on the black hole in Andromeda – but so much more. There has been news on the latest from the WISE mission, new stuff on exoplanets, some spectacular images and movies of the Sun from the Solar Dynamics Observatory – and that's just the first two days. Keep an eye on your favorite astronomy news website for the latest.
Since the dawn of the Internet, there have been countless things that have come and gone. To some of them, we can easily say good riddance (flashing rainbow icons? the used-to-death phrase of the "information superhighway"?)
In other words, not many vestiges of the Internet circa 1996 remain, but one important one does: the Webby awards. Presented by the International Academy of Digital Arts and Sciences, the Webbies are still one of the most prestigious digital awards around.
The good folks over at Cosmic Variance have blogged about a "Sports Science" segment that analyzes how well (and accurately) the New Orleans Saints quarterback Drew Brees throws the football. There's a little discussion about whether or not Brees is more accurate than an Olympic archer, but what caught our eyes and ears was the spin rate of the football they estimate Brees gives the ball.
When we get to this point in the calendar, the "year in review of fill-in-the-blank" lists just come out in droves. You can't seem to drive to the mall without running over a "best of 2009" compendium of something or other. It's as if we have all had collective amnesia over the past 12 months and are required to be subjected to a crash review course of the year that was.
John Scott is a mission planner for Chandraâ€™s Flight Operation Team, and from time to time provides an inside look for the outside world on just how people take care of this remarkable spacecraft. This entry has a bit of a mystery in the second half of the title. If you have a guess to what it means to "Preheat at 90 for 15 minutes," then post it to the comment section. (Note to the rest of the Flight Ops Team: you're not eligible!) If someone comes up with the right answer â€“ or close to it â€“ weâ€™ll send you a Chandra poster.
As most of the nation will spend the Thanksgiving holiday devouring a stuffed turkey in the warmth of their dining room, the Chandra X-ray Observatory will give thanks for the three batteries that will keep it powered during the first day of its 22nd eclipse season. With only three and a half weeks of eclipses (eight eclipses total), this season will be brief when compared to the upcoming eclipse seasons in the following few years.
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