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.

These two supernova remnants are part of a new study from NASA's Chandra X-ray Observatory that shows how the shape of the remnant is connected to the way the progenitor star exploded. In this study, a team of researchers examined the shapes of 17 supernova remnants in both the Milky Way galaxy and a neighbor galaxy, the Large Magellanic Cloud.

This composite image of data from three different telescopes shows an ongoing collision between two galaxies, NGC 6872 and IC 4970 (roll your mouse over the image above). X-ray data from NASA's Chandra X-ray Observatory is shown in purple, while Spitzer Space Telescope's infrared data is red and optical data from ESO's Very Large Telescope (VLT) is colored red, green and blue.

Q:
Is our solar system moving or traveling within our Galaxy? Is our Galaxy traveling or moving in the Universe? If so, how fast?

John Scott is a mission planner for Chandra’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 – or close to it – we’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.

This week, the United States marks the Thanksgiving holiday. For most of us, this means lots of time with family (sometimes too much), friends, and vast amounts of food. It also causes all productivity to cease anywhere close to Thursday and the days that follow. That said, however, science and space never sleep – not even from an overdose of tryptophan.

We've decided to introduce a new, intermittent series to the Chandra blog. From time to time, we'll dig into our vast archive of questions submitted by the public and post the answers written by experts at the Chandra X-ray Center. Some of these will be Chandra-specific or at least X-ray astronomy related. Others, well, they'll be somewhat random. Enjoy.

In celebration of the International Year of Astronomy 2009, NASA's Great Observatories -- the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory -- have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy.

Leisa Townsley has long been a favorite of the Chandra team. Not only does she do really interesting science, she creates some truly spectacular images that we get to share with the public. Leisa is a Senior Scientist at Penn State University. Keep your eyes open for some more gorgeous Chandra images from Leisa and her colleagues, as well as new science results, in the not-so-distant future.